Adverse Environmental Factors Research Articles

Evaluation of aluminum tolerance diversity in Avena sativa L. from the VIR collection

Background. Oat is an important food and feed cereal crop in Russia. The area under oats is 10 million ha worldwide, and 3 million ha in Russia. Acid soils with excessive content of exchangeable aluminum occupy almost every third hectare in the exUSSR territory. Oats are relatively resistant to unfavorable soil factors. Among cereal crops, oat is second only to rye and triticale in terms of resistance to exchangeable Al forms. Despite the crop’s high environmental plasticity, an important condition for obtaining sustainable oat yields is the development of new cultivars with resistance to adverse environmental factors, including metal toxicity and high soil acidity.The objective of this work was to search for oat cultivars resistant to soil stressors (excess of Н+ and Al3+) for use in breeding for edaphic resistance.Materials and methods. The research material included 687 oat accessions from the VIR global plant genetic resources collection. The accessions underwent laboratory evaluation of their aluminum tolerance at the initial growth and development stages using the method of measuring radicle growth after the exposure to aluminum stress. Reproducibility of the used modification of the method was mathematically proved.Results and discussion. Significant variation in the resistance to the studied stressor was observed among the accessions. The regions acting as sources of valuable aluminum resistance genes were identified for the crop. The accessions selected for their high resistance to exchangeable aluminum can be used in breeding programs to develop high-yielding oat cultivars with edaphic resistance.

Understanding PI3K/Akt/mTOR signaling in squamous cell carcinoma: mutated PIK3CA as an example.

Compared with those in adenocarcinoma, PIK3CA mutations are more common in squamous cell carcinoma (SCC), which arises from stratified squamous epithelia that are usually exposed to adverse environmental factors. Although hotspot mutations in exons 9 and 20 of PIK3CA, including E542K, E545K, H1047L and H1047R, are frequently encountered in the clinic, their clinicopathological meaning remains to be determined in the context of SCC. Considering that few reviews on PIK3CA mutations in SCC are available in the literature, we undertook this review to shed light on the clinical significance of PIK3CA mutations, mainly regarding the implications and ramifications of PIK3CA mutations in malignant cell behavior, prognosis, relapse or recurrence and chemo- or radioresistance of SCC. It should be noted that only those studies regarding SCC in which PIK3CA was mutated were cherry-picked, which fell within the scope of this review. However, the role of mutated PIK3CA in adenocarcinoma has not been discussed. In addition, mutations occurring in other main members of the PI3K-AKT-mTOR signaling pathway other than PIK3CA were also excluded.

Maternal exposure to ZIF-8 derails placental function by inducing trophoblast pyroptosis through neutrophils activation in mice

Adverse environmental factors during maternal gestation pose a threat to pregnancy. Environmental factors, particularly nanoparticles, can impact pregnancy by causing damage to the placenta. Compared to early gestation, foetuses in late gestation are more robustly developed and at lower risk of adverse effects from environmental factors. Delivery systems for targeted therapy during pregnancy is predominantly focused on their application in late gestation. Zeolitic imidazolate framework-8 (ZIF-8) holds great potential for targeted drug therapy. To evaluate the value of ZIF-8 in targeted treatment of disorders associated with late gestation, it is crucial to investigate the biological effects of ZIF-8 exposure during late gestation. Here, a mouse model exposed to ZIF-8 particles at different doses (5, 10, and 15 mg/kg) during late gestation was constructed. We found that ZIF-8 particles were deposited in the uterus of pregnant mice. ZIF-8 could trigger placental neutrophil aggregation and induce inflammation, which led to trophoblast pyroptosis and impair placental function, adversely affecting the foetus. Neutrophil depletion alleviated placental and foetal damage induced by ZIF-8. This study provides a novel mechanistic view of the reproductive toxicity induced by ZIF-8 and may offer clues to reduce the latent harm of adverse environmental factors to pregnancy.

The role of nanoparticles of industrial aerosols in the formation of occupational bronchopulmonary pathology

The significant prevalence of industrial aerosols with unintentional nanoparticles and the increasing use of engineering nanoparticles in modern production determine the relevance of research on the patterns of interaction with the human bronchopulmonary system. Unintentional nanoparticles are formed during various production processes: melting and welding of metals, combustion, crushing, grinding of minerals, plasma processing of materials. Engineering nanoparticles are released into the air of the work area during their production or use in any technological processes.
 The respiratory system, as a barrier organ, is most vulnerable to the effects of adverse environmental factors. At the same time, nanoparticles are the least studied component of industrial aerosols. In order to systematize data on the role of nanoparticles in the development of occupational bronchopulmonary pathology, the authors conducted a literature review.
 The size determines the features of the physical, chemical and biological properties of nanoparticles. They have high values of the ratio of surface area to volume, total surface area, which leads to an increase in reactogenicity and penetrating power. The pathogenic properties of nanoparticles depend on the chemical composition, shape, curvature of the surface, structure, charge, mass concentration, total surface area of the particles, and exposure time.
 The multidimensionality of hygienic characteristics determines the complexity of hygienic rationing and monitoring of nanoparticles. To date, safe exposure levels have not been established. When interacting with cells of the respiratory tract, nanoparticles induce the following cellular and molecular mechanisms: oxidative stress, inflammation, violation of the epithelial barrier, autophagy and dysfunction of lysosomes, stress of the endoplasmic reticulum, apoptosis, senescence, fibrosis, endothelial dysfunction, DNA damage. This leads to the development of interstitial pneumonitis, pulmonary fibrosis and obstructive disorders, and an increase in the activity of allergic inflammation. All these mechanisms are present in the pathogenesis of occupational lung diseases. Under the influence of nanoparticles of various chemical compositions, separate phenotypes of occupational chronic obstructive pulmonary disease are formed. There is a lack of epidemiological studies of the possible etiological role of nanoparticles. Nanoparticles of industrial aerosols are a significant factor in the development of occupational diseases of the bronchopulmonary system and have a significant impact on the formation 
 of phenotypes.

Placental biomarkers of fetal-originated diseases

Fetal-originated diseases refer to birth defects of offspring and multiple chronic diseases in adulthood caused by abnormal embryonic development. However, due to the vulnerability of the fetus/ neonate and technical limitations, it is very difficult to carry out effective development assessment and early warning of long-term diseases in the early stages of life. It is known that the placenta is the unique link between the mother and the fetus, and its role in the occurrence and progression of fetal-originated diseases cannot be ignored. Studies have found that a variety of adverse environmental factors (such as nanoparticle exposure) cannot pass through the placental barrier, but can lead to fetal dysplasia and multi-organ development programming changes by affecting placental development, and ultimately mediate the occurrence of fetal-originated diseases. Meanwhile, some environmental factors that can pass through the placental barrier can cause placenta-fetal co-exposure, resulting in similar signaling pathways and epigenetic changes. The placenta originates from the fetus and the mother, and its development is accompanied by changes in indicators that can be objectively and quantitatively detected. These factors can be used as a biomarker to assess maternal exposure, and placental function, and to predict the developmental status and long-term disease susceptibility of offspring. To date, researchers have discovered a variety of potential placental biomarkers, and show promising application prospects. This paper reviews the recent research on placenta-related mechanisms leading to fetal-originated diseases and placental biomarkers, to provide the theoretical and experimental basis for early warning, prevention, and treatment of fetal-originated diseases.

APPLICATION OF BIOLOGICAL GROWTH STIMULATOR IZABION AND INSECTICIDE LUX MAXI IN ADAPTIVE TECHNOLOGY OF GROWING AND PROTECTING TOBACCO

Purpose. The purpose of the article is to develop the elements of the adaptive technology of cultivation and protection of new varieties of tobacco of Ukrainian selection and to carry out the economic substantiation of the obtained results. Methodology of research. General scientific and special methods were used in the work: bibliographic and method of theoretical analysis of scientific literary sources – for studying and processing of scientific works related to the technology of tobacco cultivation; agronomic, field and biometric – to study the norms of introduction of experimental drugs, measurement of biometric indicators of tobacco plants in experimental plots; computational and constructive, mathematical and statistical, method of comparative analysis and economic method – when processing the results of scientific research for 2021-2023 and for evaluating the economic effectiveness of elements of adaptive technology of tobacco cultivation. Findings. An economic evaluation of the adaptive technology of growing and protecting tobacco from diseases and pests with elements of the use of new chemical preparations has been developed and carried out: Izabion growth biostimulator and Lux Maxi insecticide, as effective preparations for increasing the yield and quality of tobacco raw materials of the new variety of Ukrainian selection tobacco Berley 46 in the agro-climatic conditions of Transnistria of Ukraine. Their use significantly increases the level of profitability of the process of growing tobacco raw materials by improving the resistance of plants to adverse environmental factors and contributes to the growth of the competitiveness of the tobacco industry of our country on the world market. Originality. New elements of the adaptive technology of growing and protecting tobacco from diseases and pests have been developed using new environmentally safe drugs – the growth stimulator Izabion and the insecticide Lux Maxi on tobacco fields of the Berley 46 variety in the Transnistrian region of Ukraine. Indicators of economic efficiency of new elements of technology are substantiated. Practical value. The scope of application – agricultural enterprises of Transnistria of Ukraine of all organizational and legal forms, engaged in tobacco cultivation. Key words: tobacco, sort, technology, immunity, diseases, pests, growth stimulants, insecticides, cost, price, profit, profitability level, economic efficiency.

Influence of preparations on photosynthetic activity of brewing barley (Hordeum vulgare L.) plants and quality indicators of grain

Plant growth regulators and microfertilizers stimulate the accumulation of chlorophyll by plants, increase the photosynthetic activity of chloroplasts and the net productivity of photosynthesis, and contribute to increasing the resistance of crops to diseases and adverse environmental factors. The aim of the work was to study the effect of preparations on the photosynthetic activity the plants of spring barley varieties in order to achieve the proper quality of the grown products. In the research, barley plants of the spring brewing direction of the varieties Sebastian (Seyet Planteforedling I/S, Denmark) and Salomi (SAATEN Union, France) were used, which were treated with plant growth stimulator Vimpel 2, complex microfertilizer ORACUL multicomplex, a mixture of Vimpel 2 + ORACUL multi-complex and control area — water treatment. The article presents the results that show that the content of the sum of chlorophylls a and b in spring barley leaves under the influence of preparations Vimpel 2 and ORACUL multicomplex plays a major role in increasing the productivity of the crop. Accumulation of protein and starch in spring barley grains is one of the most important indicators for growing varieties of brewing value. In all variants of the study, the accumulation of protein in the grain turned out to be within acceptable limits for malting barley (8.75–10.02%), only in the control variant it remained too low. The use of preparations Vimpel 2 and ORACUL multicomplex in a mixture contributes to the accumulation of starch in spring barley grains of both studied varieties. At the same time, treatment with only growth promoter or only micro-fertilizer stimulates the accumulation of starch in the grain compared to the control, but remains at a low level for the brewing industry. The most active growth of the assimilation surface of spring barley plants in all phases of growth was observed after treatment with Vimpel 2 mixture in combination with ORACUL multicomplex. The conducted studies established a significant influence of microfertilizers and growth stimulants on the photosynthetic potential of spring barley crops. During the entire vegetation period of spring barley, the highest photosynthetic potential of crops (FPP) — 859.2 m2/ha×day was determined in the Sebastian variety with the addition of microfertilizer and growth stimulator. The high-quality work of the leaf apparatus of plants is determined by the net productivity of photosynthesis (NPP). The highest PPF index was observed on the Sebastian variety in the variant treated with a mixture of microfertilizer and growth stimulator, which is 27% higher than in the control variant. Therefore, spring barley grain of the required quality can be obtained only under the conditions of optimal combination of the use of preparations of different spectrum of action.

The influence of individual elements of agricultural technology on the productivity of durum wheat in the southern forest-steppe of the Omsk region

Relevance. For the manufacture of high-quality pasta, durum wheat grain is used. Improving the productivity of hard spring wheat is an urgent task. The formation of a powerful root system is the key to the full supply of nutrients and plastic substances to the plant. Increased productivity, the number of spikebearing shoots. Plants become more resistant to adverse environmental factors, which is important for spring durum wheat, which is more demanding than spring soft wheat. The timing of sowing and especially the application of mineral fertilizers are a significant factor affecting not only the formation of individual elements of the crop structure, which subsequently form the productivity of plants, but also the formation of the root system. To do this, it is necessary to choose the optimal sowing time, at which the critical phases of plant development fall under the most favorable agrometeorological conditions and the formation of the most powerful root system.Results. The conducted studies allow us to recommend the most optimal terms of sowing and the use of fertilizers to ensure the efficiency of growing durum spring wheat. In dry conditions, when sowing crops without applying fertilizers, sowing in the second ten days of May is most effective. If it is possible to apply nitrogen fertilizers and nitrogen-phosphorus fertilizers, it is better to sow durum spring wheat in the second and third decades of May.

Detection of coconut leaf diseases using enhanced deep learning techniques

Coconut farming is a significant agricultural activity in South India, but the coconut trees face challenges due to adverse weather conditions and environmental factors. These challenges include various leaf diseases and pest infestations. Identifying and locating these issues can be difficult because of the large foliage and shading provided by the coconut trees. Recent research has shown that Computer Vision algorithms are becoming increasingly important for solving problems related to object identification and detection. So, in this work, the YOLOv4 algorithm was employed to detect and pinpoint diseases and infections in coconut leaves from images. The YOLOv4 model incorporates advanced features such as cross-stage partial connections, spatial pyramid pooling, contextual feature selection, and path-based aggregation. These features enhance the model’s ability to efficiently identify issues such as yellowing and drying of leaves, pest infections, and leaf flaccidity in coconut leaf images taken in various environmental conditions. Furthermore, the model’s predictive accuracy was enhanced through multi-scale feature detection, PANet feature learning, and adaptive bounding boxes. These improvements resulted in an impressive 88% F1-Score and an 85% Mean Average Precision. The model demonstrates its effectiveness and robustness even when dealing with medium-resolution images, offering improved accuracy and speed in disease and pest detection on coconut leaves.

Cumulative Genetic Scores Interact with Maternal and Paternal Parenting in Predicting Parent-Adolescent Cohesion and Conflict.

Previous research concerning the interplay between genetics and parenting in the development of the parent-child relationship during adolescence has been extremely scarce, predominantly adopting single-gene designs. This limited body of work has largely overlooked the distinct effects of maternal and paternal roles, as well as potential gender differences. Additionally, existing gene-by-environment (G × E) studies have mainly concentrated on adverse environmental factors and associated negative outcomes, somewhat neglecting positive environments and outcomes. The present study examined the interactions of cumulative genetic scores (CGS, dopamine receptor D2 TaqIA and oxytocin receptor gene rs53576 polymorphisms) with both positive and negative parenting on parent-adolescent cohesion and conflict. Furthermore, this study aimed to ascertain with which gene-environment model the potential G × E interactions would align. A total of 745 Chinese Han adolescents (Mage = 13.36 ± 0.96 years; 46.8% girls) from grades 7 to 9 participated in this study. Results revealed a significant effect of CGS and negative maternal parenting on mother-adolescent conflict among males, consistent with the weak differential susceptibility model. As CGS increased, the effects of negative maternal parenting on mother-son conflict were magnified. These findings have implications for the timing and focus of interventions aimed at improving parent-adolescent relationships.

Analysis of some promising directions of the development of the public health risk assessment in the Russian Federation (review article)

The population of developed and developing countries is constantly under the influence of a complex of adverse environmental factors that can negatively affect health. The Public health risk assessment is one of the strategic directions of hygiene development in the Russian Federation. Therefore, the study, improvement, and use of health risk assessment are a promising direction and the basis for effective primary prevention of environmentally related diseases in our country.
 The purpose of the work is to describe the current directions of risk assessment. 
 To achieve this goal, the systematization of legislative and methodological documents and the analysis of literary data from a number of sources were carried out. The analysis was made among the sources: «Analiz riska zdorov’yu» (Health risk Analysis), «Gigiena i sanitariya» (Hygiene and Sanitation), “Pubmed”, “eLibrary”, “Cyberleninka”, «Mezhdunarodnyj zhurnal jeksperimental’nogo obrazovanija» (International Journal of Experimental Education). The search was conducted for the keywords: “Risk assessment”, “Combined exposure”. The archive for 2018–2023 was studied in the journal “Analiz riska zdorov’yu”.
 As a result, promising areas of scientific research were identified: harmonization of terminology used in assessing health risks; development of methodological approaches to risk assessment associated with exposure to physical factors; development of methodological approaches to assessing the risk associated with the combined impact on the health of the population of adverse environmental factors of various nature; taking into account the individual sensitivity of the population; taking into account the impact of multiple uncertain factors.

Risk factors for malignant oral mucosal lesion development (literature review). Part 2. Exogenous factors

Relevance. Cancer stands as a prominent cause of untimely mortality in young and middle-aged individuals (aged 20-64 years). The inquiry into the extent of influence exerted by external risk factors on the emergence of oral mucosal oncopathology remains pertinent. Equally crucial is understanding the intricate interplay among different groups of factors and their effects.Research objective. To determine the extent of influence exerted by various endogenous and exogenous risk factors on the development of malignant oral mucosal lesions, based on contemporary literature data, and to assess their interrelationships.Materials and methods. The research material was the analysis of literary data from bibliographic sources – Elsevier, PubMed, Elibrary, Google Academy, Medline, Cyberleninka. The study included literature sources in Russian and English. The second part of the review combines studies devoted to the study of the influence of exogenous controlled factors on the risk of developing malignant neoplasms of the oral mucosa.Results. Through contemporary literature analysis, the potential and scale of influence attributed to controllable exogenous risk factors in the development of malignant oral mucosal lesions have been established. Notably, significant impact has been associated with smoking and alcohol consumption. Additionally, adverse socio-economic conditions, environmental factors, and dietary habits have been identified as contributors to an elevated cancer risk. Throughout this investigation, it became evident that literature sources frequently highlight the influence of individual factors without adequately considering potential synergies, antagonistic effects, or interactions with endogenous factors. Moreover, certain factors pivotal to the carcinogenesis of oral cavity tumors remain inadequately researched.Conclusion. To facilitate efficient primary and secondary prevention measures, it is imperative to advance and refine a multidisciplinary research methodology. This approach should aim to comprehensively identify the collective impact of diverse groups of risk factors on the progression of malignant oral mucosal lesions.

Understanding AP2/ERF Transcription Factor Responses and Tolerance to Various Abiotic Stresses in Plants: A Comprehensive Review.

Abiotic stress is an adverse environmental factor that severely affects plant growth and development, and plants have developed complex regulatory mechanisms to adapt to these unfavourable conditions through long-term evolution. In recent years, many transcription factor families of genes have been identified to regulate the ability of plants to respond to abiotic stresses. Among them, the AP2/ERF (APETALA2/ethylene responsive factor) family is a large class of plant-specific proteins that regulate plant response to abiotic stresses and can also play a role in regulating plant growth and development. This paper reviews the structural features and classification of AP2/ERF transcription factors that are involved in transcriptional regulation, reciprocal proteins, downstream genes, and hormone-dependent signalling and hormone-independent signalling pathways in response to abiotic stress. The AP2/ERF transcription factors can synergise with hormone signalling to form cross-regulatory networks in response to and tolerance of abiotic stresses. Many of the AP2/ERF transcription factors activate the expression of abiotic stress-responsive genes that are dependent or independent of abscisic acid and ethylene in response to abscisic acid and ethylene. In addition, the AP2/ERF transcription factors are involved in gibberellin, auxin, brassinosteroid, and cytokinin-mediated abiotic stress responses. The study of AP2/ERF transcription factors and interacting proteins, as well as the identification of their downstream target genes, can provide us with a more comprehensive understanding of the mechanism of plant action in response to abiotic stress, which can improve plants' ability to tolerate abiotic stress and provide a more theoretical basis for increasing plant yield under abiotic stress.

Cassava phosphatase PP2C1 modulates thermotolerance via fine-tuning dephosphorylation of antioxidant enzymes.

Global warming is an adverse environmental factor that threatens crop yields and food security. 2C-type protein phosphatases (PP2Cs), as core protein phosphatase components, play important roles in plant hormone signaling to cope with various environmental stresses. However, the function and underlying mechanism of PP2Cs in the heat stress response remain elusive in tropical crops. Here, we report that MePP2C1 negatively regulated thermotolerance in cassava (Manihot esculenta Crantz), accompanied by the modulation of reactive oxygen species (ROS) accumulation and the underlying antioxidant enzyme activities of catalase (CAT) and ascorbate peroxidase (APX). Further investigation found that MePP2C1 directly interacted with and dephosphorylated MeCAT1 and MeAPX2 at serine (S) 112 and S160 residues, respectively. Moreover, in vitro and in vivo assays showed that protein phosphorylation of MeCAT1S112 and MeAPX2S160 was essential for their enzyme activities, and MePP2C1 negatively regulated thermotolerance and redox homeostasis by dephosphorylating MeCAT1S112 and MeAPX2S160. Taken together, this study illustrates the direct relationship between MePP2C1-mediated protein dephosphorylation of MeCAT1 and MeAPX2 and ROS accumulation in thermotolerance to provide insights for adapting to global warming via fine-tuning thermotolerance of the tropical crop cassava.

FusionPlanner: A multi-task motion planner for mining trucks via multi-sensor fusion

In recent years, significant achievements have been made in motion planning for intelligent vehicles. However, as a typical unstructured environment, open-pit mining attracts limited attention due to its complex operational conditions and adverse environmental factors. A comprehensive paradigm for unmanned transportation in open-pit mines is proposed in this research. Firstly, we propose a multi-task motion planning algorithm, called FusionPlanner, for autonomous mining trucks by the multi-sensor fusion method to adapt both lateral and longitudinal control tasks for unmanned transportation. Then, we develop a novel benchmark called MiningNav, which offers three validation approaches to evaluate the trustworthiness and robustness of well-trained algorithms in transportation roads of open-pit mines. Finally, we introduce the Parallel Mining Simulator (PMS), a new high-fidelity simulator specifically designed for open-pit mining scenarios. PMS enables the users to manage and control open-pit mine transportation from both the single-truck control and multi-truck scheduling perspectives. The performance of FusionPlanner is tested by MiningNav in PMS, and the empirical results demonstrate a significant reduction in the number of collisions and takeovers of our planner. We anticipate our unmanned transportation paradigm will bring mining trucks one step closer to trustworthiness and robustness in continuous round-the-clock unmanned transportation.

A Climate History of Early Dutch Settlement at Cape Town, 1652–62

This article uses historical and climatological methods to recontextualise the first decade of Dutch settlement at the Cape, 1652–62. It draws on weather data contained in the Journal of Jan van Riebeeck, natural proxies in the region, climate reanalysis and the global context of a particularly severe period during the Little Ice Age to reconstruct climatic conditions at monthly and seasonal scales for the decade under review. This reconstruction shows that the Dutch settled at a time of declining moisture at the Cape: relatively wet summers gave way to dry winters, while short-term droughts and deluges were regular occurrences. It then integrates this climatic context into an understanding of the history of this period. In so doing, it argues that adverse climatic conditions helped to undermine early Dutch designs on intensive agriculture, accelerated many free burghers’ initial transition towards pastoralism, shaped the timing and volume of the cattle trade between settlers and indigenous populations and exacerbated tensions that led to the first Khoikhoi–Dutch war (1659–60). It may also have enhanced the transmission of and deaths from disease, though the evidence in this instance is less conclusive. In short, a climate-historical perspective shows that adverse climatic and environmental factors critically affected many of the core themes that are already associated with the history of early Dutch settlement at the Cape.

Study of antimutagenic activity of medicinal plant infusions Crataegus sanguinea Pall. family Rosaceae in plant test systems

Medicinal plants, integral to traditional medicine systems, are rich sources of biologically active substances that benefit physiological and biochemical processes within living organisms. Amongst these activities, antimutagenic and genoprotective properties stand out, offering mitigation against genotoxic effects induced by adverse environmental factors on genetic material. This study delves into the mutagenic and antimutagenic capacities of aqueous and alcoholic infusions derived from Crataegus sanguinea Pall. (Rosaceae family), utilising Hordeum vulgare L. as a plant-based test subject. The assessment employed the metaphase chromosome analysis technique. Results indicate that these infusions exhibit no mutagenic activity, with the level of chromosomal aberrations in barley seeds treated with these infusions not exceeding the natural mutation rate in a statistically significant manner. When infusions were combined with Methyl methanesulfonate (positive control) exposure – irrespective of exposure sequence – a statistically significant attenuation in MMS-induced mutagenesis was observed (p<0.01). A 56-60% reduction quantified the antimutagenic efficacy of C.sanguinea infusions. This metric underscores the infusions’ capability to inhibit MMS-induced mutagenesis by 50–60%, positioning these water and alcohol-based extracts of common hawthorn as viable candidates for safeguarding against chemically induced mutagenic factors.

IMPROVEMENT OF TECHNOLOGIES FOR GROWING HIGH-PRODUCT VARIETIES OF WINTER WHEAT IN SCIENTIFICALLY BASED CROP ROTATIONS UNDER THE CONDITIONS OF CLIMATE CHANGE

It has been established that in order to sustainably meet the needs of food grain, the decisive role belongs to the improvement of technologies for growing high-yielding varieties of winter wheat in scientifically based crop rotations, the urgency of whose implementation is caused by climate changes. It was found that in solving the mentioned problem, great importance is attached to the creation of new varieties of winter wheat with high genetic potential of productivity and quality, stable resistance to diseases, pests, adverse environmental factors. An important role in the improvement of such technologies is played by selection, thanks to which the creation of new and improvement of existing varieties of winter wheat takes place. Important trends in the selection of winter wheat are: development of new high-yielding varieties with complex resistance to diseases and pests; increasing the adaptive properties of breeding material to natural and anthropogenic factors; research of the gene pool of plants, selection of donors of economic-valuable traits, establishment of new physiological-biochemical, anatomical-morphological and cytogenetic traits and their connection with better properties; improvement of methods of creating raw material for the selection process. Great importance is attached to the research, development and improvement of systems and methods of stabilizing selection in order to preserve varietal identity, improvement of methods of approbation in the direction of varietal control of crops. An important role is played by the use of scientifically based seed crop rotations with effective saturation, placement and ratio of crops belonging to groups with different biological properties. When placing seed crops of winter wheat, it is necessary to take into account the culture's requirements for fertility, moisture availability, clogging, and mechanical composition of the soil. When drawing up a scheme for alternation of crops in crop rotations, attention is focused on the fact that each crop should ensure high and stable yield and quality of seeds. Because precursors affect the yield and seed quality of winter wheat depending on how much they dry out the soil and use nutrient reserves. The preservation of winter wheat varieties from biological and mechanical clogging is of great importance. In order to preserve the purity of seed crops, it is forbidden to place winter wheat after predecessors, the carrion of which can clog its variety. In addition, it is necessary to exclude the possibility of contamination of seed crops with diseases and pests that are transmitted by wind, water, as well as through soil, seeds, plant residues, etc. It is especially important to take into account the clogging of crops by weeds, the seeds of which are difficult to separate from grain: ryegrass in oat crops, ragweed in pea crops, wild radish in wheat and barley crops. It was determined that in the conditions of climate change, in seed crop rotations, it is necessary to observe varietal agricultural techniques, use optimal rates of organic and mineral fertilizers, siderates, post-harvest sowing, plant protection products, and also apply differentiated tillage.

Landscape Perception of Children Under the Age of 12 Living in Different Settings: A Systematic Review

Abstract Due to the increasing scale of urbanisation, the topic of natural landscape perception is receiving more and more attention. Children who live in the city experience significantly less contact with nature and, due to that, lose connection with it. Therefore, this study aims to determine how the landscape perception of children who live in urban areas differs from that of children who live in rural places. The main findings were obtained using a systematic analysis of the literature. The results of this study show that in rural areas, children often have more space, freedom, and opportunities to experience and get to know the natural landscape and understand its processes, while in cities, children lose their close connection with nature and are constantly exposed to adverse environmental factors. This deterioration of environmental conditions, pollution, and constant noise is already becoming a common phenomenon for children. There is a need to conduct deeper research to understand better how children perceive the natural environment and how it can help preserve a child’s connection with nature in the cities.

Селекционная ценность мутантных форм ярового ячменя в условиях Волго-Вятского региона

Many crops have a very small genetic “base”. The use of a limited number of parental forms reduces the genetic diversity of commercial varieties and exacerbates the problem of their resistance to adverse environmental factors. Induced mutagenesis is one of the means to generate genetic variation in crops in a shorter time compared to crosses and can be used to develop source material for breeding and new varieties with high yields, excellent product quality, resistance to climate change and tolerance to biotic and abiotic stresses. The aim of the research is to evaluate mutant forms of spring barley for economic characters based on competitive variety testing data, to identify sources of breeding valuable traits for further use as source material in breeding. The research was carried out in 2021–2023 at the FARC of the North-East, Kirov. The object of research were nine mutant samples and variety Pamyati Dudina, created at the Vyatka State Agrotechnological University through the influence of various combinations of mutant factors on the seeds of spring barley variety Bios 1. During the research period a comprehensive study of mutant forms of spring barley was conducted in the nursery of competitive variety testing. The conducted research has confirmed the possibility of obtaining beneficial mutations on barley crop as a result of application of chemical and physical low-toxic and safe factors. Stress-resistant mutant forms capable of stable yield in both favorable and unfavorable years have been identified: M 4–10, M 5–3, M 9–5–3 and M 6–10. The conducted research has shown that all the studied mutant forms are characterized by a complex of breeding-valuable traits and are a valuable source material for the creation of new varieties of spring barley for the conditions of the Volga-Vyatka region. However, it is necessary to include them in crosses with lodging resistant genotypes.