Type Of Plant Material Research Articles

Biologically Active Diterpenoids in the Clerodendrum Genus-A Review.

One of the key areas of interest in pharmacognosy is that of the diterpenoids; many studies have been performed to identify new sources, their optimal isolation and biological properties. An important source of abietane-, pimarane-, clerodane-type diterpenoids and their derivatives are the members of the genus Clerodendrum, of the Lamiaceae. Due to their diverse chemical nature, and the type of plant material, a range of extraction techniques are needed with various temperatures, solvent types and extraction times, as well as the use of an ultrasound bath. The diterpenoids isolated from Clerodendrum demonstrate a range of cytotoxic, anti-proliferative, antibacterial, anti-parasitic and anti-inflammatory activities. This review describes the various biological activities of the diterpenoids isolated so far from species of Clerodendrum with the indication of the most active ones, as well as those from other plant sources, taking into account their structure in terms of their activity, and summarises the methods for their extraction.

ASSESSMENT OF BIOFUEL PRODUCTION TECHNOLOGIES FROM MICROALGAE AND ORGANIC WASTE

Today, the processing of organic matter, such as organic waste or microalgae, is an important way to renewable energy sources. To maintain a prosperous life of the population, it is critical that renewable sources of energy be found. Problem statement. In the near future, mineral and organic reserves of the earth's interior will cease to meet the growing energy needs of civilization. Already today, technologies have emerged that allow the production of fossil fuels based on many plant species. But the cultivation of such crops leads to depletion of land resources. In other words, the top and thin fertile layer of humus is gradually depleted, which can lead to the use of millions or billions of hectares of arable land. And here to replace usual terrestrial cultures come microalgae. Research methodology. The study was based on the analysis of theoretical studies and comparison of different types of biological fuels from plant-type and microalgae, at the economic, environmental and social levels. Results and discussion. Biodiesel from microalgae is a third generation fuel obtained by processing vegetable raw materials. It is known that algae are characterized by a high content of fatty acids, which are the basis for the production of biodiesel. Microalgae are very cheap and, at the same time - highly productive raw materials. One hectare of microalgae produces 30 times more biofuel than one hectare of soybeans. At the same time, biofuel from algae is 5-10% more energy-intensive than biodiesel from vegetable oils. In addition, microalgae grow quite rapidly. For example, algae, which is 80% composed of substances similar in origin to oil, grows in 10 days, while the same algae, which is 30% composed of substances similar in origin to oil, grows in only 3 days. Another advantage of using algae is the fact that, unlike growing other types of plant materials, they do not need to be fed and fertilized - they use carbon dioxide (CO2) for growth. The higher the concentration of carbon dioxide, the faster they are cultivated. Thus, the cultivation of microalgae can solve several problems: the problem of the greenhouse effect; the problem of employment of sown areas; the problem of shortages of traditional fuels and many other equally important problems. Conclusion. Organic susstance as microalgae have been experimented as a potential feedstock for biofuel generation in current era owing to its’ rich energy content, inflated growth rate, inexpensive culture approaches, the notable capacity of CO2 fixation, and O2 addition to the environment. The implementation of the technology of biofuel production from organic waste also warns of danger, first of all for people. By reducing free waste, use it as a secondary material and benefit from it. Integrated waste management technology includes successive steps that take into account the environmental, economic and social spheres of life.

Influence of peracetic delignification on biomass lignocellulosic complex

The process of delignification of plant biomass with peracetic acid was studied and the effect of the duration of peracetic delignification on the degree of delignification and the degree of removal of the carbohydrate complex in the final cellulose products was established. The treatment of different representatives of plant biomass was performed with peracetic acid at a concentration of 8% and at different time of the process. The study was focused on the process of chemical treatment of six different representatives of non-wood plant raw materials in the form of straw, agricultural waste, as well as stems of fast-growing industrial and fodder crops. Cellulose products were obtained with a yield of about 50% and a whiteness of greater than 60%. It was shown that an increase in the duration of processing naturally leads to a decrease in the yield of the final product, which is associated with the intensive oxidation and removal of lignin, as well as partial destruction of the polysaccharide component of biomass. The investigated method of delignification proved to be effective for the removal of more than 90% of lignin in the entire studied time interval, but the selectivity of the removal of lignin and carbohydrates depended significantly on the type of plant material. By an increase in the efficiency of lignin removal with peracetic acid, the studied plants are located in the following row: sverbiga (bunias orientalis)>shchavnat>lavatera>rapeseed>wheat straw>amaranth. Conducted research work gives grounds to claim that peracetic delignification is an effective method of chemical treatment of plant biomass; it allows obtaining cellulose products that can be used in the production of paper products for various purposes, as well as for the chemical industry.

Studies on the chemical composition of plants used in traditional medicine in Congo

Abstract The knowledge of the chemical composition of herbs used medicinally in Africa is relatively low, and at the same time, the growing interest in alternative medicine prompts scientists to search for justification for the use of various plants. Due to these, the aim of the study was to analyze ten botanical species of medicinal plants originating from Congo to determine the contents of non-metals (P, Se), metallic elements (Cu, Zn, Fe, Mn, Ca, Mg, Na, K, Cd, Pb, Cr, Co, Al), phenolic compounds, and L(+) ascorbic acid and antioxidant activities. To prepare plant samples for quantitative analysis by flame atomic absorption spectrometry (FAAS) and inductively coupled plasma-optical emission spectroscopy, the microwave digestion was applied. The contents of phenolic acids, flavonoids, polyphenolic compounds, and vitamin C were assayed in extracts of medicinal plants spectrophotometrically, while the antioxidant activity was determined by ferric reducing antioxidant power (FRAP), 2,2-Diphenyl-1-picryl-hydrazyl-hydrate (DPPH), and 2,2 -Azino-bis-3-ethylbanzothiazoline-6-sulfonic acid (ABTS) techniques. The studies showed that the medicinal plants from Congo differed to a high degree. Principal component analysis demonstrated that the concentrations of Cu, Fe, Mn, and also phenolic compounds and antioxidant activity had the highest impact on sample’s differentiation. The relationship between the type of plant material (bark, root, or leaf) and its chemical composition was noticed, too.

Yield Potential of Shallots Bulbil Planting Materials with Liquid Organic Fertilizer Treatment out of Season

The main problem with shallots in Indonesia is planting material. The use of consumption tubers as planting material is very high. Efforts are needed to replace consumption tuber planting material with other planting materials such as aerial tubers. This study examines the potential yield of aerial tuber planting material and consumption tuber with fertilization treatment. The study used a Completely Randomized Block Design with a split-plot pattern with two factors, namely: fertilizer (as the main plot) with two levels, namely: with liquid and chemical fertilizer. Types of planting material (as a subplot) with three levels, namely aerial tubers, large consumption tubers (1.93-2.05 cm) and small consumption tubers (1.04-1.29 cm). Repeat three times. Liquid organic fertilizer can be used to improve the chemical quality of the soil. The combination of bulbils planting material with chemical fertilizer resulted in the highest fresh weight of bulbs per plot and dry weight of bulbs per plot, namely 394.67 grams and 338.67 grams, respectively. However, the highest number of bulbs planted in the treatment of large consumption bulbs was 7 bulbs. The diameter of bulbs produced from bulbils planting material and bulb consumption was the same. Shallot bulbs have potential as planting material.

Profiling plant histone modification at single-cell resolution using snCUT&Tag.

Profiling plant histone modification at single-cell resolution using snCUT&Tag.

Selective Quantification of Erwinia amylovora Live Cells in Pome Fruit Tree Cankers by Viability Digital PCR.

The accurate assessment of Erwinia amylovora live cell populations in fire blight cankers by classic microbiology methods has major limitations. Some of them are the presence of competitive microbiota in samples that inhibit E. amylovora's growth and the release of toxic compounds by plant material during sample processing, which may hamper the pathogen's ability to form colonies on solid media. Digital PCR (dPCR) combined with the photo-reactive DNA-binding dye propidium monoazide (PMA) allows selective detection and quantification of live E. amylovora cells in woody samples while overcoming the constraints of culture-dependent methods. This work describes a reliable viability dPCR procedure to determine E. amylovora live cell concentrations in fire blight cankers from pome fruit trees. This protocol can be adapted for the analysis of other types of plant material and enables investigation of ecological, epidemiological, and management significance of cankers as a relatively underexplored part of the fire blight disease cycle.

The reuse of bio-waste from the invasive species Tradescantia fluminensis as a source of phenolic compounds.

Phenolic compounds have numerous applications for different industrial sectors, where this natural raw material from bio-waste would help to achieve more sustainable production. To optimize extraction in the invasive species Tradescantia fluminensis the response surface methodology, specifically the Box-Behnken design (BBD), was used to investigate the effects of three independent variables, namely time (hour), temperature (°C) and solvent type (distilled water, ethanol and hexane) on the response, total phenolic content (TPC). Statistical analysis for the optimized conditions revealed that the best TPC extraction was obtained for stems with hexane, at 45 °C, 4 h (8.45 mg GAE/g) and for leaves with distilled water, 35 °C, 4 h (4.69 mg GAE/g). The identification of the extracts from the different parts by HPLC-MS/MS reported a high content of phenolic acids and a low content of flavonoids. The phenolic acids mostly present were sinapic acid and ferulic acid, mainly in the stem fraction. The presence of these acids with high antioxidant potential makes T. fluminensis interesting for pharmaceutical and food preservation applications. The current management of bio-waste resulting from invasive species control actions are not fully effective and sometimes may result in other problems. If this type of plant material proves to contain potential for use to industry, it could become established within a circular and sustainable bioeconomy.

Potential of Three Taro (Colocasia esculenta L.) Cultivars as Animal Feed

The growth and yield of taro (Colocasia esculenta L.) plants are influenced by the planting material. The use of planting material derived from corms is expected to improve the quality and quantity of taro growth and yield. This research aimed to find the best type of planting material and cultivars for taro growth and the potential of taro plants as animal feed. The experiment was carried out in Jember, East Java ( elevation ±89 m asl). The experiment used the randomized completed block design method with two treatment factors, the type of planting material (B) as the first factor (B1: taro corms, B2: taro tiller, B3: taro stolon) and the use of taro cultivars (V) as the second factor (V1: green taro, V2: ketan taro, V3: Sukabumi taro). The treatment was repeated four times. The results showed that there was an interaction between the use of taro planting material and taro cultivar that could influence the tuber weight per plant. The types of planting material had a significant effect on the number of tillers, leaf area, corm weight and diameter, and the planting of several taro cultivars significantly affected all observed variables. The treatment that gave the best results was planting material from taro tuber (B1) and Sukabumi cultivar (V3) with a tuber weight yield of 362.58 g (±14.5 tons/ha). Meanwhile, the Sukabumi cultivar (V3) had the best potential as animal feed. Overall, the stems and leaves of taro had a protein content of 1.19–2.02%, while the corms had 2.82–4.09%.

Untargeted Analysis of Lemna minor Metabolites: Workflow and Prioritization Strategy Comparing Highly Confident Features between Different Mass Spectrometers.

Metabolomics approaches provide a vast array of analytical datasets, which require a comprehensive analytical, statistical, and biochemical workflow to reveal changes in metabolic profiles. The biological interpretation of mass spectrometric metabolomics results is still obstructed by the reliable identification of the metabolites as well as annotation and/or classification. In this work, the whole Lemna minor (common duckweed) was extracted using various solvents and analyzed utilizing polarity-extended liquid chromatography (reversed-phase liquid chromatography (RPLC)-hydrophilic interaction liquid chromatography (HILIC)) connected to two time-of-flight (TOF) mass spectrometer types, individually. This study (introduces and) discusses three relevant topics for the untargeted workflow: (1) A comparison study of metabolome samples was performed with an untargeted data handling workflow in two different labs with two different mass spectrometers using the same plant material type. (2) A statistical procedure was observed prioritizing significant detected features (dependent and independent of the mass spectrometer using the predictive methodology Orthogonal Partial Least Squares-Discriminant Analysis (OPLS-DA). (3) Relevant features were transferred to a prioritization tool (the FOR-IDENT platform (FI)) and were compared with the implemented compound database PLANT-IDENT (PI). This compound database is filled with relevant compounds of the Lemnaceae, Poaceae, Brassicaceae, and Nymphaceae families according to analytical criteria such as retention time (polarity and LogD (pH 7)) and accurate mass (empirical formula). Thus, an untargeted analysis was performed using the new tool as a prioritization and identification source for a hidden-target screening strategy. Consequently, forty-two compounds (amino acids, vitamins, flavonoids) could be recognized and subsequently validated in Lemna metabolic profile using reference standards. The class of flavonoids includes free aglycons and their glycosides. Further, according to our knowledge, the validated flavonoids robinetin and norwogonin were for the first time identified in the Lemna minor extracts.

Free Radical Scavenging Activity of Infusions of Different Medicinal Plants for Use in Obstetrics.

An X-band (9.3 GHz) electron paramagnetic resonance (EPR) spectroscopy was used to examine the free radical scavenging activity of the following infusions, which were nonirradiated and exposed to UVA: root of Asparagus racemosus and herbs of Mitchella repens, Cnicus benedictus L., Galega officinalis L., and Eupatorium cannabinum L. The plant materials for obstetrics applications were chosen for analysis. The aims of these studies were to compare the free radical scavenging ability of the tested infusions and to determine the influence of UVA irradiation of the plant materials on interactions of these infusions with free radicals. Both the magnitude and kinetics of the interactions of the infusions with the model DPPH free radicals were examined. The ability to quench the free radicals for the examined plant infusions increases in the following order: Asparagus racemosus (root) < Mitchella repens (herb) < Cnicus benedictus L. (herb) < Galega officinalis L. (herb) < Eupatorium cannabinum L. (herb). The analyzed infusions differ in the kinetics of the interactions with free radicals. The fastest interactions with free radicals characterize the infusions of Galega officinalis L. herb and Eupatorium cannabinum L. herb. The infusion of Mitchella repens herb interacts with free radicals in the slowest way. UVA radiation reduces the antioxidant interactions of all tested infusions, especially the infusion of Eupatorium cannabinum L. herb, which should be protected against UVA radiation during storage. The weakest decrease of free radical scavenging activity was observed for the infusion of the root of Asparagus racemosus exposed to UVA radiation. UVA radiation affected the speed of the free radical interactions of the infusions, depending on the type of plant materials. EPR spectroscopy is useful to examine the free radical scavenging activity of plant infusions, which is helpful to find effective antioxidants for applications in obstetrics and their optimal storage conditions.

The Scientific Basis of the Target Plant Concept: An Overview

Reforestation and restoration using nursery-produced seedlings is often the most reliable way to ensure successful establishment and rapid growth of native plants. Plant establishment success—that is, the ability for the plant to develop within a set period of time with minimal further interventions needed—depends greatly on decisions made prior to planting, and yet nursery-grown plants are often produced independently of considering the range of stressors encountered after nursery production. The optimal plant or seedling will vary greatly with species and site (depending on edaphic and environmental conditions), and in having the biological capacity to withstand human and wildlife pressures placed upon vegetative communities. However, when nursery production strategies incorporate knowledge of genetic variability, address limiting factors, and include potential mitigating measures, meeting the objectives of the planting project—be it reforestation or restoration—becomes more likely. The Target Plant Concept (TPC) is an effective framework for defining, producing, and handling seedlings and other types of plant material based on specific characteristics suited to a given site. These characteristics are often scientifically derived from testing factors that are linked to outplanting success, such as seedling morphology and physiology, genetic source, and capacity to overcome limiting factors on outplanting sites. This article briefly summarizes the current knowledge drawn from existing literature for each component of the TPC framework, thereby helping land managers and scientists to meet objectives and accelerate reforestation and restoration trajectories.

Plant-matrix reference materials as a tool for ensuring the uniformity of chemical measurements in geochemistry, ecology, agriculture and pharmacology

The population needs reliable information on the chemical composition of plants and products made from them in order to preserve the environment and its safety. With the increase in cross-border trade, there is a growing demand for traceable results of determining the content of chemical elements in plants and not only proteins, fats, carbohydrates, pesticides, moisture, vitamins, etc., which can affect the quality of human life. An urgent but difficult analytical task is to obtain reliable measurements of the elemental composition of agricultural and wild plants and various products made from them. Reference materials (RMs) are a widely recognized tool for ensuring the uniformity of chemical measurements. They are designed for certification (validation) of existing and new methods (techniques) of chemical analysis, certification studies in the development of reference materials, and professional testing of laboratories. The article lists the reputable manufacturers of plant RMs in which the content of chemical elements is certified. The ratio of certified, reference, and quality control samples of plant-matrix has been assessed. The classification of certified reference materials according to the type of plant material used for their food application is provided. The contribution of different countries to the development of plant CRMs is hown. The selection of plants for the development of new RMs is discussed from two points of view, namely food composition databases (AOAC INTERNATIONAL) and the ‘Reference Plant’ chemical fingerprinting (B. Markert). Based on the consolidation of studies devoted to the development and appliance of plant-matrix reference materials, a list of the most important requirements has been compiled for reference materials that ensure the reliability and comparability of the results of chemical analysis in the fields of biology, geochemistry, ecology, agriculture, medicine, and interdisciplinary research.

A modern analogue matching approach to characterize fire temperatures and plant species from charcoal

Charcoal identification and the quantification of its abundance in sedimentary archives is commonly used to reconstruct fire frequency and the amounts of biomass burning. There are, however, limited metrics to measure past fire temperature and fuel type (i.e. the types of plants that comprise the fuel load), which are important for fully understanding the impact of past fire regimes. Here, we expand the modern reference dataset of charcoal spectra derived from micro-Fourier Transformed Infrared Spectroscopy (FTIR) and apply an analogue matching model to estimate the maximum pyrolysis temperature and the type of plant material burned. We generated laboratory-created reference charcoal from nine plant species that were heated to six temperature categories (100 °C increments between 200 °C–700 °C). The analogue matching approach used on the FTIR spectra of charcoal estimated the maximum pyrolysis temperatures with an accuracy of 57%, which improved to 93% when accuracy was considered ±100 °C. Model accuracy for the type of plant material burned was 38% at the species level, which increased to 67% when species were grouped into trait-based categories. Our results show that analogue matching is an effective approach for estimating pyrolysis temperature and the type of plant material burned, and we suggest that it can also be applied to charcoal found in palaeoecological records, improving our understanding of past fire regimes and fuel dynamics.

Produktivitas Rumput Hamil (Panicum maximum cv Hamil) yang Ditanam Menggunakan Benih Berbeda

Reproductive traits determine the selection method in plant breeding. The benggala grass of the Hamil cultivar was thought to be apomictic; thus, a study was conducted to determine its reproduction. The research began by studying the morphological characters, continued with observing the generative phase and seed production of the cultivar planted from seeds (generative) and from pols (vegetative). The experiment was conducted in the greenhouse of the Research Institute of Animal Production. The experimental design was a completely randomized design with ten replications, and the treatments were different types of plant materials: seeds and pols. The Hamil cultivar taken from RIAP Collection was planted in pots with a diameter of 40 cm and a height of 30 cm. The results showed that most of the morphological characters of the Hamil cultivar planted from seeds and from pols were not different (P &gt;0.05), so it was presumed that they were apomictic. The difference in morphology was only in the length and width of the flag leaves and the length of the internodes, where the cultivars planted using seeds were higher. The production of seeds, pithy seed weight, and seed germination of cultivars planted using seeds were higher (P &lt;0.05). Further research is needed to determine the apomixis properties based on cytologically Hamil cultivars.&#x0D; &#x0D; Keywords: apomixis, benggala grass, morphology, plnting material; seed

The seed quality of Indonesian cowpea local varieties after storage

The optimum performance of the cowpea plant population in the field could be determined by their seed quality. The research aims to evaluate the seed quality of several cowpea local varieties after being stored in the form of seeds and pods. A total of 18 cowpea local varieties from East Java, West Nusa Tenggara, South Kalimantan, and West Sulawesi were evaluated for their seed vigor and viability after being stored for 30 and 60 days at room temperature using plant material in the form of seeds and pods. The seed multiplication was conducted in the field at Banyuwangi, and the seed quality test using sand media was carried out at the glasshouse of ILETRI Malang. The storage of cowpea in the form of pods and seeds for up to 30 days did not significantly affect the seed quality. Four local varieties (VU 0007, VU 0093, VU 0125, VU 0155) showed good viability at the storage of 30 and 60 days, respectively. The VU 0032 and VU 0076 have optimum viability after being stored for 60 days. The speed of the germination index (SGI) was not only describing the level of vigor but also able to show the type of plant material to be stored. The VU 0007, VU 0093, and VU 0155 were recommended to be stored in the form of seeds, meanwhile, the VU 0125 can be stored for up to 60 days in the form of seeds or pods. The morphological characters of sprouts, namely hypocotyl length, stem dry weight, and root dry weight, could be considered as a benchmark parameter for seed vigor of cowpea.

Micropropagation and in vitro conservation of Ruta graveolens plants

Ruta graveolens is a widespread plant in moderate and semiarid regions with several medicinal properties that are overturning and is threatened due to destruction and overuse for the pharmaceutical and food industry. Moreover, conventional propagation through seeds is not sufficient enough to produce due to seed dormancy and poor seed viability for which clonal propagation is the need of the hour. Therefore, the current study outlines a simple approach for clonal propagation and germplasm conservation of R. graveolens. Seeds were firstly surface decontaminated and germinated on agar water media, then micro shoots were cultivated on Murashige and Skoog (MS) medium contains 3% sucrose. The addition of 1.5 mg/L 6-Benzylaminopurine (BAP) produced a maximum multiplication rate (4.2 shoots per explant). Root formation was developed at the base of micro shoot on MS containing Indole-3- Butyric acid (IBA), Indole Acetic Acid (IAA), or Naphthalene Acetic Acid (NAA). Maximum root number and root length produced at 0.9 mg/L NAA (2.25 roots per explants, and 2.69 mm length). The survival rate after acclimatization reached 90% under the greenhouse conditions when rooted plantlets were adopted to ex vitro employing in 1 soil: 1 perlite: 1 peat mixture. Micro shoots were kept for up to 16 weeks without serious losses at 6 ± 2 °C utilizing MS medium supplemented with sucrose, glucose, fructose, or sorbitol at different concentrations. Media supplemented with 6% sucrose resulted in the maximum number of shoots (2.69 shoots per explants) in the two methods of conservation. Further studies are still needed on medium-term conservation to enhance the survival percentages of different plant material types.

Research on the Influence of Water Storage Medium on early Planting Performance of Portland Cement Foamed Concrete

Adding sap particle, Portland cement foamed concrete was studied to manufacture a new type of planting material. The pH, porosity, permeable capacity, infiltration rate and water storage were tested for evaluating the performance of foamed concrete. Solid-liquid extraction method and image binaryzation were used to study the pH and porosity of foamed concrete. A kind of self-made permeable device was also used in this paper. It was found that the pH of foamed concrete could be decreased by sap particles absorbed the boric acid solution in 14 d. For the foaming effect of fresh concrete was disturbed by liquid from sap particles, the porosity of foamed concrete was increased and then decreased. Seepage channels could be formed in foamed concrete when sap particles shrunk for releasing liquid and they also would be block for sap particles expanding when water permeated into foamed concrete. The permeable capacity and infiltration rate were decreased with increasing sap particles. The water storage of foamed concrete was fluctuated with sap particles increasing but more than that without sap particles. The optimal dosage of sap particles was 0.3wt% of binder material in this study. At the dosage, the minimal pH of foamed concrete could be obtained and performance of that would be good to plant, such as permeable capacity, infiltration rate and water storage.

FORESTRY EVALUATION OF GROWTH OF FOREST CROPS OF SPIRIT CREATED BY DIFFERENT TYPES OF PLANTING MATERIAL

The purpose of the scientific article is to assess the growth and condition of forest crops of European spruce, created by various types of planting material. The planting of European spruce seedlings in the southern taiga forest area was studied, their survival rate was assessed, and a comparative analysis of the growth of forest crops created by planting material with a closed root system and planting material with open roots was performed.

РАЗВИТИЕ ИССЛЕДОВАНИЙ СИЛОВОГО РЕЗАНИЯ ДРЕВЕСИНЫ КОРНЕЙ САЖЕНЦЕВ ЛЕЗВИЕМ РАБОЧЕГО ОРГАНА ВЫКОПОЧНОГО ОБОРУДОВАНИЯ

Large-sized woody plants are widely used in forestry and forest parks. This type of planting material, which has certain advantages over ordinary seedlings and seedlings in the form of better preservation and survival rate, prolonging the planting season and reducing the volume of preparatory work, is transplanted with a soil lump using special equipment. Research has being carried out to create equipment for digging out large-sized plants with a lump of soil. Previously, laboratory experiments were carried out to assess the effort of cutting the roots of tree species with blades of various configurations. The obtained data made it possible to determine the optimal geometric parameters of the cutting edge of the blade - the sharpening angle is 30 ° and the angle at the apex of the oblique blade is 105 °. However, this configuration of the cutting element did not always provide a cut of the root system without damage. This paper presents further improvement of the design of plant lifters and the development of research on power cutting of root wood with cutting elements of various profiles. During the experiments, we used blades with the following cutting edge shape: horizontal, providing horizontal cutting with a flat wedge, as well as oblique and arcuate for sliding cutting. According to the research results, it was determined that the smallest cutting force is provided by the use of a blade with an arcuate cutting edge. It has been established that this blade configuration in combination with a cutting edge sharpening angle of 30 ° allows cutting the roots with minimal squeezing and cracking of their surface