Late Maturation Research Articles

Is Biobanding the Future of Youth Sport Participation?

Traditionally, sports participation has been based on the chronological age of the individual with year of birth determining participation grouping. However, grouping by chronological age can result in individuals who are nearly a full year different in age competing within the same age group. Moreover, during the pubertal years, age grouping may provide physical (size) advantage to early maturers and disadvantage to late maturers. These advantages/disadvantages could impact talent selection, psychosocial aspects of sport participation, technical and tactical skill development, competitiveness, and injury risk. Biobanding is an alternative method for determining sport participation categorization and uses factors of growth and/or maturation, rather than traditional chronological age, for grouping athletes. Implementation of biobanding in sports may be advantageous to both early and late-maturing athlete development.

The Effect of Integrative Training Program on Youth Soccer Players’ Power Indexes

Integrative neuromuscular training (INT) is commonly employed for preventing injuries, yet there is a scarcity of studies examining its impact on the physical capabilities of young athletes. This study sought to explore the influence of a brief, in-season INT intervention on the performance of adolescent soccer players. The participants included thirty-one U15 (under 15 years old) soccer players who were randomly assigned to either the control group (CG) (engaged solely in soccer training, n = 14, 14.6 ± 0.6 years) or the exercise group (EG) (where INT was incorporated into traditional soccer training, n = 17, 14.1 ± 0.6 years). Early or late maturers were excluded from the study. The INT program lasted for 5 weeks (two sessions per week) and mainly included single-leg exercises. At the commencement and conclusion of the intervention program, measurements were taken for acceleration (10 m), speed (30 m), jumping ability (squat jump, SJ, and countermovement jump, CMJ), and change of direction ability (COD) (Illinois agility test). The data analysis employed a two-way repeated-measures ANOVA. The INT program resulted in enhanced performance for the EG in SJ (28.4–32.3, p < 0.001, η2 = 0.463), CMJ (30.6–35.3, p < 0.001, η2 = 0.426), and COD ability (18.11–17.64, p = 0.003, η2 = 0.545). No changes in performance were observed in the CG. The results suggest that the addition of a short-duration in-season INT program in U15 soccer players can induce positive adaptations in their performance.

Photochemical activity in developing pea (Pisum sativum L.) cotyledons depends on the light transmittance of covering tissues and the spectral composition of light.

Many crops require not only leaf photosynthesis for their seed development but also the photochemical reactions that occur in the seeds. The purpose of this work was a comparative analysis of light transmittance and photochemical activity in the leaves of Pisum sativum L. and its pericarp, seed coat, and cotyledons at the early, middle, and late maturation stages. The spectral composition of light was measured using a spectroradiometer in the range of 390-760 nm. We assessed the light transmittance of plant tissues by placing the plant tissue between the light source and the spectroradiometer's sensor. PAM fluorometry was used to quantify the photochemical activity in plant tissues: this technique is handy for evaluating the efficiency of converting light energy into chemical energy through the analysis of the kinetics of chlorophyll fluorescence excitation and quenching. On average, a photochemically active green leaf of pea transmitted 15 % of solar radiation in the 390-760 nm, blue light was delayed entirely, and the transmitted red light never exceeded 5 %. Photochemically active radiation passing through the pericarp and coat and reaching the cotyledons at the early and middle seed maturation stages manifested a high proportion of green and far-red light; there was no blue light, and the percentage of red light was about 2 %. However, the cotyledons were photochemically active regardless of low irradiance and spectral ranges untypical of leaf photosynthesis. At the early and middle maturation stages, the maximum quantum yield of photosystem II (Fv/Fm) averaged 0.5 at the periphery of cotyledons and 0.3 at their center. Since the intensity of embryonic photochemical reactions significantly affects the efficiency of reserve nutrient accumulation, this parameter is a promising marker in pea breeding for seeds with improved nutritional qualities.

The Effects of Gibberellic Acid and Cane Girdling of Applications on Crimson Seedless Grape Variety of Cluster and Berry Characteristics

‘Crimson Seedless’ grape variety is a late maturity and small berry size. Berry size is one of the most important quality parameters of table grapes. This trial was carried out in the Crimson Seedless (Vitis vinifera L.) grower vineyard in Sarıgöl (dadağlı) locality of Manisa province in the 2022 vegetation period. A randomized complete block design was used with vines as blocks and clusters as the experimental unit’s four treatments and four replications. Vine bunches of Crimson Seedless grape variety, ten years old, were sprayed extensively with a GA3 (Gibberellic Acid) solution (20 mg L-1) on the 25th of April 10th of May, and 10th of June/2022, while girdling (G) was applied from removing 3 mm diameter bark all around from 10 cm below the top of the vine trunk at fruit set stage. Control (C) only water was sprayed. This study aimed to reveal gibberellic acid and cane girdling applications on Crimson Seedless cluster and berry characteristics. Harvest (oBrix 19) was done on the 10th of October/2022 and after that, the cluster weight (g), cluster length (cm), cluster width (cm), berry weight (g), berry length (mm), berry diameter (mm), berry length/berry diameter, total soluble solid, total acidity and maturity index were determined in fresh fruit samples randomly taken from each vine. It was found that all applications generally had statistically (P

Grass-based finishing of early- and late-maturing breed bulls within suckler beef systems: Performance, profitability, greenhouse gas emissions and feed-food competition

Demand for beef is increasing but concerns about the environmental impact of ruminant-protein production and food security are also increasing. Animal performance, profitability, greenhouse gas (GHG) emissions and feed-food competition within spring-calving suckler grass-based systems in which the males, progeny of either early- (EM) or late-maturing (LM) breed sires, were finished from pasture-alone or pasture-plus-concentrate supplementation, at 19.5 months-of-age, were evaluated. Sixty yearling bulls, previously offered grass silage ad libitum and supplementary concentrates during a first winter ‘store’ period, were assigned within breed type (EM or LM) to a pasture-finishing strategy of grass only (G-G) or grass + 3.2 kg dry matter of a barley-based concentrate daily (G-GC). Bulls rotationally grazed Lolium perenne-based swards over a 192 day grazing season. Concentrates were offered to G-GC treatments for the final 95 days following which all animals were slaughtered. The experimental data produced were used to populate a whole-farm systems economic and environmental model to determine beef output, profit, GHG emissions and feed-food competition of spring-calving suckler calf-to-beef systems. There were no finishing strategy × breed type interactions. Supplementation increased slaughter weight (+37 kg), carcass weight (+27 kg), carcass fat score (+1.1 units, 15-point scale), and resulted in more yellow subcutaneous fat. The LM bulls were heavier at slaughter (+65 kg), had a heavier carcass (+45 kg), greater kill-out proportion (+14 g/kg), a greater lean meat proportion in the carcass (+35 g/kg), superior carcass conformation score (+1.4 units, 15-point scale), lower carcass fat score (-1.2 units), and more yellow subcutaneous fat than EM bulls. Compared to G-GC suckler calf-to-beef systems, G-G systems had lower beef output, were less profitable, had higher GHG emission intensities (kg CO2 eq) per kg live- (10.2 v. 10.1), carcass- (18.6 v. 18.1) and meat- weight (26.1 v. 25.5), but superior human-edible protein (HEP) and energy efficiencies. The LM-sired systems were more profitable, had lower GHG emission intensities, and superior HEP and energy efficiency than EM systems. The HEP efficiency ratios exceeded 1.0 (i.e. were net producers of protein) for the G-G treatments and ranged from 0.9 to 1.0 for the G-GC treatments, when offered the ‘control’ barley-soyabean meal based concentrate: alternatively, using by-product concentrate feedstuffs increased the HEP ratios to 3.9 or greater. In conclusion, the existence of synergies and trade-offs between sustainability metrics makes the selection of a beef production system that optimises all performance metrics difficult.

Review on Effects of Organophosphate Pesticides in Human Health and Way to Mitigates its Harmful Impacts

Due to increasing the human population day by day, for the control of the human population, needs to increase the agricultural productivity, for agricultural production is increasing we use pesticide. Pesticides not only kill the target pest species also affect non-target organisms. Pesticide pollution has become a significant problem all over the world. This is mainly due to the abuse and overuse of pesticides which remain in the soil for several years and leach into water bodies. Pesticides are chemical (synthetic or semi-synthetic) agents that control and destroy pest population. Organophosphate pesticides are major bulk that includes malathion, parathion, diazinon, fenthion, chlordecone, Imidacloprid, dichlorvos, chlorpyrifos, ethion, nerve gases (soman, sarin, tabun, VX), ophthalmic agents (echothiophate, isoflurophate), and antihelmintics (trichlorfon). Herbicides (tribufos or DEF, merphos) are tricresyl phosphate etc. Though various pesticides were banned due to its harmful impacts on human health and environment, but still some has been used in paddy fields, greenhouse culture, horticulture and even hydroponics. They persistent in nature (bio-accumulation and bio-magnification by the food chain, especially through pieces) and cause acute or chronic toxicity. They contain very noxious components that harm our neuronal system by cholinergic effects. Pesticide also has an unfavorable effect on aquatic organisms such as ataxia causing late maturation in fish. Various physical and chemical methods are used for the reduction the toxicity of pesticides, physically and chemically pesticide reduction process is costly and hazardous. One good strategy is applied for the remediation of pesticides is bioremediation, i.e- use of various modified strain of agricultural microbes especially bacteria.

Relationships among development, growth, body size, reproduction, aging, and longevity - trade-offs and pace-of-life

Relationships of growth, metabolism, reproduction, and body size to the biological process of aging and longevity have been studied for decades and various unifying “theories of aging” have been proposed to account for the observed associations. In general, fast development, early sexual maturation leading to early reproductive effort, as well as production of many offspring, have been linked to shorter lifespans. The relationship of adult body size to longevity includes a remarkable contrast between the positive correlation in comparisons between different species and the negative correlation seen in comparisons of individuals within the same species. We now propose that longevity and presumably also the rate of aging are related to the “pace-of-life.” A slow pace-of-life including slow growth, late sexual maturation, and a small number of offspring, predicts slow aging and long life. The fast pace of life (rapid growth, early sexual maturation, and major reproductive effort) is associated with faster aging and shorter life, presumably due to underlying trade-offs. The proposed relationships between the pace-of-life and longevity apply to both inter- and intra-species comparisons as well as to dietary, genetic, and pharmacological interventions that extend life and to evidence for early life programming of the trajectory of aging. Although available evidence suggests the causality of at least some of these associations, much further work will be needed to verify this interpretation and to identify mechanisms that are responsible.

Disrupting Poly(ADP-ribosyl)ating Pathway Creates Premalignant Conditions in Mammalian Liver.

Hepatocellular carcinoma (HCC) is a major global health concern, representing one of the leading causes of cancer-related deaths. Despite various treatment options, the prognosis for HCC patients remains poor, emphasizing the need for a deeper understanding of the factors contributing to HCC development. This study investigates the role of poly(ADP-ribosyl)ation in hepatocyte maturation and its impact on hepatobiliary carcinogenesis. A conditional Parg knockout mouse model was employed, utilizing Cre recombinase under the albumin promoter to target Parg depletion specifically in hepatocytes. The disruption of the poly(ADP-ribosyl)ating pathway in hepatocytes affects the early postnatal liver development. The inability of hepatocytes to finish the late maturation step that occurs early after birth causes intensive apoptosis and acute inflammation, resulting in hypertrophic liver tissue with enlarged hepatocytes. Regeneration nodes with proliferative hepatocytes eventually replace the liver tissue and successfully fulfill the liver function. However, early developmental changes predispose these types of liver to develop pathologies, including with a malignant nature, later in life. In a chemically induced liver cancer model, Parg-depleted livers displayed a higher tendency for hepatocellular carcinoma development. This study underscores the critical role of the poly(ADP-ribosyl)ating pathway in hepatocyte maturation and highlights its involvement in liver pathologies and hepatobiliary carcinogenesis. Understanding these processes may provide valuable insights into liver biology and liver-related diseases, including cancer.

Stability of Elite late Maturity Pro-vitamin a Enriched maize (Zea mays L.) varieties across Environments

Stability of Elite late Maturity Pro-vitamin a Enriched maize (Zea mays L.) varieties across Environments

Evaluation of Betel Nut Germplasm in Barishal Region

The field evaluation of betel nut germplasm was conducted at Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barishal all the year round during three consecutive years of 2019-22 to select suitable entry (ies) for releasing as new variety (ies) for Barishal region. Seven entries of betel nut viz., E1 (AC Rah-01), E2 (AC Rah-02), E3 (AC Rah-03), E4 (AC Rah-04), E5 (AC Rah-05), E6 (AC Rah-06) and E7 (AC Rah-07) were used as testing materials. The germplasm had been collected from different regions of Bangladesh since 1973. Three years average results showed that significant variations were observed among the evaluated betel nut germplasm. The maximum fresh and dry nut yield with husk (34.48 and 12.07 t/ha, respectively) was obtained from AC Rah-02 that was identical to AC Rah-01 (28.24 and 10.57 t/ha, respectively). Results revealed that the three years average yield performances of AC Rah-02 and AC Rah-01 were higher compared to that of other tested entries. Maturing condition of AC Rah-01 was late but early maturity was observed in AC Rah-02 and other tested entries. Nut shapes of AC Rah-01 and AC Rah-02 were oblong and oval, respectively. The laboratory analyses results revealed that alkaloids that caused oral cancer was less (3.95 mg/g) and the Ferric Reducing Antioxidant Power that cures the disease was higher (10.20 mgAAE/g) in AC Rah-01. The amount of total alkaloids (1.35%) and Arecoline content (4.69 mg/g) that cause cancer in the mouth were lower in AC Rah-02. Considering yield potentiality, maturity condition (late and early), lower incidences of insect-pest and diseases, and biochemical properties (higher Antioxidant power and lower contents of Alkaloids or Arecoline), AC Rah-01 and AC Rah-02 have been selected as promising entries of betel nut towards releasing new varieties for Barishal region of Bangladesh. Bangladesh J. Agril. Res. 47(3): 291-302, September 2022

Mechanisms and Strategies for the Growth of Territorial Tourism Industry under the Transfer Matrix Model

Abstract In this paper, firstly, according to the conditions of the growth of the tourism industry in the whole region and the requirements of the growth mechanism, the time sequence of the growth of the tourism industry in the whole region is divided into three phases: the initial start-up phase, the mid-growth phase and the late maturity phase, and puts forward the strategy of the growth of the tourism industry in the whole region. Then, on the basis of the transfer matrix model, according to the law of tourism industry development to determine the tourism industry’s independent variable power function, considering the impact of economic policy and monetary policy on the development of the tourism industry, the need to eliminate the direct effect of the tourism industry independent variable, and then construct the transfer matrix based on the spatial distribution of the tourism industry analytical model and hierarchical system analytical model, and the whole region of the tourism industry in Hubei Province for example research and analysis. The results show that on the model analysis, the prediction accuracy of VM and FM varies among five different groups: purchase>tour> food>travel>housing. In the tourism industry, the correlation coefficient between “food and beverage, accommodation, shopping and entertainment” is around 0.95. This study not only contributes to the green and sustainable development of China’s tourism industry but also is an important step in promoting the construction of ecological civilization.

Pubertal development at age 14 is associated with male adolescents’ combustible cigarette smoking and dual use, but not with e-cigarette use – Findings from the UK Millennium Cohort Study

BackgroundAdolescent nicotine exposure via electronic cigarettes (e-cigarettes) is a global health concern. Pubertal development earlier than peers increases the risk of tobacco smoking compared to peers experiencing on-time or late maturation, yet relationships of pubertal timing with e-cigarettes are unknown. We examine whether early pubertal timing is associated with risk for e-cigarette use, tobacco cigarettes, or both by age 14. MethodsThe Millennium Cohort Study follows a representative cohort of 18,552 9-month-old children born 2000–2002 in the United Kingdom. Our sample includes 11,445 adolescents (5697 boys, 5748 girls) classified at age 14 as early, on-time, or late in pubertal development timing (PDT) relative to same-age, same-sex peers using the Pubertal Development Scale. Outcomes were use of e-cigarettes, tobacco cigarettes, or both by age 14. We included childhood liability confounders and demographics measured from age 7–11. ResultsFor girls, no PDT differences in age 14 e-cigarette or tobacco cigarette use were observed. All relative to on-time PDT boys, early maturing boys’ odds of tobacco cigarette use were 59% higher (OR=1.59, 95% confidence interval (CI)=1.08,2.35), and odds of dual-use were 49% higher (OR=1.49, CI=1.11,1.99), both compared to odds of never use. Among late PDT boys, dual-use odds were lower than never use by 35% (OR=0.65, CI=0.47,0.91) and lower than e-cigarette use only by 36% (OR=0.64, CI=0.42,0.97). ConclusionsAt age 14, PDT was not associated with e-cigarette use for either sex, yet it was linked with tobacco use and dual use among boys.

Development of Novel Monoclonal Antibodies to Wheat Alpha-Amylases Associated with Grain Quality Problems That Are Increasing with Climate Change.

Accurate, rapid testing platforms are essential for early detection and mitigation of late maturity α-amylase (LMA) and preharvest sprouting (PHS) in wheat. These conditions are characterized by elevated α-amylase levels and negatively impact flour quality, resulting in substantial economic losses. The Hagberg-Perten Falling Number (FN) method is the industry standard for measuring α-amylase activity in wheatmeal. However, FN does not directly detect α-amylase and has major limitations. Developing α-amylase immunoassays would potentially enable early, accurate detection regardless of testing environment. With this goal, we assessed an expression of α-amylase isoforms during seed development. Transcripts of three of the four isoforms were detected in developing and mature grain. These were cloned and used to develop E. coli expression lines expressing single isoforms. After assessing amino acid conservation between isoforms, we identified peptide sequences specific to a single isoform (TaAMY1) or that were conserved in all isoforms, to develop monoclonal antibodies with targeted specificities. Three monoclonal antibodies were developed, anti-TaAMY1-A, anti-TaAMY1-B, and anti-TaAMY1-C. All three detected endogenous α-amylase(s). Anti-TaAMY1-A was specific for TaAMY1, whereas anti-TaAMY1-C detected TaAMY1, 2, and 4. Thus, confirming that they possessed the intended specificities. All three antibodies were shown to be compatible for use with immuno-pulldown and immuno-assay applications.

The influence of extraction of various solvents on chemical properties on Chang 7 shale, Ordos Basin, China

Abstract. To explore the effect of various solvents extraction on the chemical property of shale, several lacustrine shale samples from the Chang 7 member of the Upper Triassic Yanchang Formation, Ordos Basin, with maturities, from marginally mature (Tmax=439∘) to late mature (Tmax=456∘), were extracted by using acetone, tetrahydrofuran (THF), carbon disulfide (CS2), and benzene, respectively. Fourier transform infrared spectroscopy (FTIR) was employed to examine the functional groups of the samples before and after extraction with different solvents. The results showed that the extraction yield from shale with THF is significantly higher than that of other solvents, which may be related to the properties of the THF, including the aromatic structure, high boiling point, excellent Hansen solubility parameters, and strong polarity. The total organic carbon (TOC)-normalized yield of the mature sample J1 is significantly higher than that of other samples, which may be related to the fact that the J1 sample is at the peak of hydrocarbon generation; thus, a large number of kerogens were cracked into oil and bitumen. The aromaticity of organic matter (OM) increases with the increase in the maturity. The length of the aliphatic chains of the OM first increased with the increase in the maturity before late maturity stage and then decreased in late maturity stage. The extraction of shale samples with solvents hardly changes the length of aliphatic chains. Higher aromaticity is observed in shale residues after THF extractions than for other solvents (i.e., acetone, CS2, and benzene).

Early Maturity Mechanism and High-Yielding Cultivation of Short-Season Cotton in China

Short-season cotton is a type of cotton variety characterized by its abbreviated cycle, rapid development, and concentrated flowering and boll setting. Compared with full-season cotton, short-season cotton facilitates an easier attainment of desirable maturation even when sown relatively late. This advantage of late sowing and early maturation eliminates the necessity for plastic film mulching, thereby creating opportunities for diversified double cropping, such as cotton–wheat, cotton–garlic, cotton–rape, and cotton–triticale systems. This paper provides a comprehensive review of the morphological, physiological, and molecular biological mechanisms underlying early maturity in short-season cotton. Furthermore, the significance and application of short-season cotton is discussed in relation to optimizing planting patterns and methods, promoting its cultivation in saline fields, developing machine-harvested cotton, and encouraging plastic mulch-free cotton planting. Based on these analyses and discussions, the paper proposes future strategies aimed at enhancing the breeding and cultivation of short-season cotton. These findings serve as valuable references for global breeding and cultivation research, and application of short-season cotton in the future.

A Pilot Multicentric Prospective Study on the Usefulness of Peripheral Blood Immunophenotyping As Erythroid Maturation Response Marker during Luspatercept Treatment in Patients Affected By ß-Thalassemia Major and SF3B1+ Myelodysplastic Syndrome

Introduction Erythropoiesis is a multi-step maturation process; luspatercept proved to be successful on ineffective erythropoiesis acting on the second phase of erythroid maturation reducing the hyper expression of transforming growth factor beta (TGF-beta) ligands via the Smad 2/3 signaling pathway, thus ameliorating the aberrant late stage erythroid maturation featured in the myelodysplastic syndrome (MDS) and thalassemia. MEDALIST and BELIVE studies showed efficacy and safety of Luspatercept in MDS and Thalassemic patients respectively, but, regarding erythroid maturation, a significant correlation has been revealed only between hematological response and the reticulocyte value or medullar erythroblasts counts. In order to avoid for patients extra scheduled bone marrow aspirate , in particular in thalassemic patients, in our pilot study we propose to explore, for the first time, the role of peripheral blood immunophenotyping (IF) as reproducible and more affordable erythroid maturation's marker respect to the medullar immunophenotyping described in the previous published papers. Our hypothesis is that peripheral IF could represent a new tool to detect the ameliorate of inefficacy erythropoiesis during Luspatercept therapy, acting as “minimal residual disease” in patients in response or that loss the response to Luspatercept. Patients, Material and Methods Approval by local Ethic Scientific Commission has be completed. Patients will be enrolling by Hematology Unit and by Hemoglobinophaties Unit from 2 different Institution in Italy (“A. Businco” Oncologic Hospital and “A. Cao” Hemoglobinopathies Hospital). Inclusion criteria: Patients must be affected by MDS with ringed sideroblasts (with or without SF3B1 mutation) very low, low and intermediate revised IPSS stage or affected by ß-thalassemia major; aged ≥ 18 years and able to understand and sign an informant consent; not renal or hepatic failure; EF > 50%. Duration of the study will be scheduled for 1 year. Prevision of 30 patient enrolled in the first 1 year of study. Primary endpoint is to confirm the role of peripheral blood immunophenotyping (IF) as reproducible and affordable erythroid maturation's marker in these setting of patients. Secondary endpoint is to evaluate the role of peripheral IF as “minimal residual disease” in particular during the loss of Lusplatercept response and also the assessments of iron homeostasis in responder's patients. Patients will be assessed for r-IPSS and NGS (only for MDS), endogenous erythropoietin, full blood count and reticulocyte, iron status, transfusion burden in the previous 24 weeks and peripheral IF (centralized in the laboratory of Hematology Unit). All patients will collect these samples at baseline timing and after 12,24,36 and 48 weeks. Peripheral IF is tested by 8-color EuroFlow antibody panels define progressive terminal stages of erythroblasts' maturation (10 health samples have been used as control). Hematological response and Luspatercept's dose escalation are considered as for MEDALIST study criteria for MDS and BELIVE study for thalassemia, as well adverse events. Results At the time of this report 26 patients have been enrolled in the two institution (10 MDS and 16 thalassemic patients). Baseline patients' characteristics are reported in TAB 1 and baseline peripheral blood erythroid maturation (based on centralized IF) are reported in TAB 2 Conclusion Our pilot study aims to explore, for the first time, the role of peripheral blood immunophenotyping (IF) as reproducible and affordable erythroid maturation's marker during Luspatercept therapy in Thalassemic and MDS patients.

Seedling emergence and biomass production of soybean cultivars under wheat-soybean relay cropping.

Diversification and intensification of cropping systems can ensure farm profitability while reducing negative environmental impacts of agriculture. Wheat-soybean relay cropping (RC), which consists in planting soybean into standing wheat prior to its harvest, may have this potential although it is poorly adopted by French and European farmers. One of the reasons underlying this lack of adoption could be poor emergence rates and biomass production of soybean, due to a severe competition from the already established primary crop for water, light and nutrients during the co-growth or intercrop phase. All these constraints during the early plant growth could finally affect soybean grain yield and thus farm profitability. Here, we performed a laboratory experiment followed by a 2-year field trial (2021-2022) to investigate potential differences among seven soybean cultivars belonging to different maturity groups (from very early to late) in terms of early growth traits viz. seed germination, seedling emergence vigor and final rates, and early biomass production in wheat-soybean RC. A reference soybean variety belonging to late maturity group (cv. ES Pallador) was also sown under conventional cropping system as control treatment (hereafter referred to as CC). Under laboratory conditions, the base water potential for germination ranged from -0.65 to -0.45 MPa with significant differences (p<0.001) among the tested cultivars indicating their differential tolerance to water stress. Under field conditions, seedling emergence vigor, an index explaining the speed of emergence, ranged from 0.23 to 0.41 and from 0.24 to 0.33 while final emergence rates ranged from 69% to 93% and from 65 to 90% in 2021 and 2022, respectively. We found significant effect of cultivar, year and cultivar x year interaction on emergence vigor (p<0.001) and final emergence rates (p<0.01, p<0.05 and p<0.01, respectively) of soybean cultivars. Significantly higher emergence vigor of the referent cv. ES Pallador was observed in RC compared to CC cropping system in 2021 (0.40 and 0.34, respectively) but not in 2022 (0.29 and 0.31, respectively). Water stress in the seedbed was higher in RC compared to the CC and was the main cause affecting seed germination and seedling emergence vigor especially in 2022. We found a positive correlation between seedling emergence vigor and seedling final emergence rates indicating that a lower speed of seedling emergence, due to seedbed stress factors, affects final emergence rates of soybean. Post-emergence losses due to pigeons were significantly higher (p<0.001) in CC compared to RC (30% and 2% in 2021, and 29% and 2% in 2022 in CC and RC, respectively). Significantly higher biomass production was observed in CC compared to that in RC both in 2021 (162 vs 33 g/m2 of dry matter; p<0.001) and 2022 (252 vs 60 g/m2 of dry matter; p<0.001). Overall, pre-/post-emergence water stress in the seedbed and post-emergence damage due to pigeons are the most important factors affecting a uniform and robust soybean establishment under RC and CC, respectively under southern French conditions.

Maturation of flounder species in the northern part of the Sea of Okhotsk in 1997–2019

Data on the rate of maturation during the linear growth of flounder species in the northern part of the Sea of Okhotsk based on samples collected in 1997–2019 are given. These data contradict the idea developed in the literature about the flounders of the northern part of the Sea of Okhotsk as small-sized, early maturating species. The flounders reach sexual maturity when they reach approximately the same size and age as in northern populations of the same species. In comparison with the populations of the corresponding species in the south of the range, all of them are characterized by relatively late and long maturation, and become fully mature shortly before the end of their life cycle.

Chlorophyll fluorescence is a potential indicator to measure photochemical efficiency in early to late soybean maturity groups under changing day lengths and temperatures.

In this study, we employed chlorophyll a fluorescence technique, to indicate plant health and status in response to changing day lengths (photoperiods) and temperatures in soybean early and late maturity groups. Chlorophyll a fluorescence study indicates changes in light reactions in photosystem II. Experiments were performed for 3-day lengths (12.5, 13.5, and 14.5 h) and five temperatures (22/14°C, 26/18°C, 30/22°C, 34/26°C, and 40/32°C), respectively. The I-P phase declined for changing day lengths. Active reaction centers decreased at long day length for maturity group III. We observed that low temperatures impacted the acceptor side of photosystem II and partially impacted electron transport toward the photosystem I end electron acceptor. Results emphasized that higher temperatures (40/32°C) triggered damage at the oxygen-evolving complex and decreased electron transport and photosynthesis. We studied specific leaf areas and aboveground mass. Aboveground parameters were consistent with the fluorescence study. Chlorophyll a fluorescence can be used as a potential technique for high-throughput phenotyping methods. The traits selected in the study proved to be possible indicators to provide information on the health status of various maturity groups under changing temperatures and day lengths. These traits can also be deciding criteria for breeding programs to develop inbreed soybean lines for stress tolerance and sensitivity based on latitudinal variations.

Sustained selective attention in adolescence: Cognitive development and predictors of distractibility at school

Despite much research into the development of attention in adolescence, mixed results and between-task differences have precluded clear conclusions regarding the relative early or late maturation of attention abilities. Moreover, although adolescents constantly face the need to pay attention at school, it remains unclear whether laboratory measures of attention can predict their ability to sustain attention focus during lessons. Therefore, here we devised a task that was sensitive to measure both sustained and selective attention and tested whether task measures could predict adolescents’ levels of inattention during lessons. In total, 166 adolescents (aged 12–17 years) and 50 adults performed a sustained selective attention task, searching for letter targets while ignoring salient yet entirely irrelevant distractor faces, under different levels of perceptual load—an established determinant of attention in adults. Inattention levels during a just preceding classroom lesson were measured using a novel self-report classroom distractibility checklist. The results established that sustained attention (measured with response variability) continued to develop throughout adolescence across perceptual load levels. In contrast, there was an earlier maturation of the effect of perceptual load on selective attention; load modulation of distractor interference was larger in the early adolescence period compared with later periods. Both distractor interference and response variability were significant unique predictors of distractibility in the classroom, including when controlling for interest in the lesson and cognitive aptitude. Overall, the results demonstrate divergence of development of sustained and selective attention in adolescence and establish both as significant predictors of attention in the important educational setting of school lessons.