Czasopisma Uniwersytetu Przyrodniczy w Lublinie
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The impact of selected agrotechnical treatments on the growth of wild garlic (Allium ursinum L.) leaves in field cultivation
Get PDFWild garlic (Allium ursinum L.) is a typical spring geophyte whose natural habitat is beech forests. The research aimed to assess the possibility of cultivating wild garlic in field conditions significantly different from those required by this plant, using environmentally friendly and unconventional treatments. This study aimed to evaluate the effect of selected agricultural practices (catch crop, shading plant, biopreparations) on the growth of wild garlic leaves grown in the field.
The results show that the biomass of catch crops and shade plants and biopreparations from marine algae are justified in cultivating wild garlic in field conditions regarding the leaf yield. Ploughing of phacelia biomass on a catchment soil with an unstable structure positively affected the growth of wild garlic, increasing the length of leaves, their number, and the length and width of the leaf blade. Winter turnip rape used as a shade plant caused an increase in the length of the leaves and the value of the FV/FM index (the quotient of the variable fluorescence to the maximum fluorescence), and also, depending on the year of the study, the length and width of the garlic leaf blade. Soaking the bulbs before planting in the ‘Kelpak SL’ solution increased the number of garlic leaves growing without turnip rape cover in the second and third years of cultivation. In the first year of vegetation, longer leaves with a larger leaf blade ensured the preparation was sprayed three times without pre-soaking the bulbs. Considering the biopreparations’ positive effect on the growth of garlic leaves and the FV/FM ratio values, their use is prospective regarding the increasing occurrence of dry years and is an alternative to plant irrigation
In vitro propagation of Liparis nervosa (Thunb.) Lindl., an endangered medicinal orchid
Get PDFIn vitro regeneration was studied to protect the rare Chinese medicinal orchid Liparis nervosa (Thunb.) Lindl. The mixtures of protocorm and seeding and the stem tip were used as explants. The results revealed that the best essential medium for L. nervosa growth was 1/3 MS medium with 25 g · L–1 sucrose, 50 g · L–1 banana puree, 40 g · L–1 mashed potato, and 1.0 g · L–1 AC (MS1); MS1 medium with 0.5 mg · L–1 BA, 0.05 mg · L–1 2,4-D, and 1.5 mg · L–1 NAA was optimal for proliferation. When stem tips were cultured in a proliferation medium, four types of proliferation occurred: basal stem cluster bud (occurring at the basal node), tiller bud (occurring at the root), protocorm-like body (occurring at the plant’s base incision), and high-position bud (occurring on plant stem nodes other than the basal nodes). Four methods produced 10.12 proliferation coefficients. In the MS1 medium with 0.5 mg · L−1 NAA, the plantlets rooted 100%, and the rooted plantlets survived 100% after domestication and transplantation.In vitro regeneration was studied to protect the rare Chinese medicinal orchid Liparis nervosa (Thunb.) Lindl. The mixtures of protocorm and seeding and the stem tip were used as explants. The results revealed that the best essential medium for L. nervosa growth was 1/3 MS medium with 25 g · L–1 sucrose, 50 g · L–1 banana puree, 40 g · L–1 mashed potato, and 1.0 g · L–1 AC (MS1); MS1 medium with 0.5 mg · L–1 BA, 0.05 mg · L–1 2,4-D, and 1.5 mg · L–1 NAA was optimal for proliferation. When stem tips were cultured in a proliferation medium, four types of proliferation occurred: basal stem cluster bud (occurring at the basal node), tiller bud (occurring at the root), protocorm-like body (occurring at the plant’s base incision), and high-position bud (occurring on plant stem nodes other than the basal nodes). Four methods produced 10.12 proliferation coefficients. In the MS1 medium with 0.5 mg · L−1 NAA, the plantlets rooted 100%, and the rooted plantlets survived 100% after domestication and transplantation
Development of the male and female gametophyte, fertilization, and assessment of germination and regulation of dormancy in Iris aphylla L. seeds
Get PDFThe observations of fruiting and formation of offspring through generative propagation presented in this study were aimed at determination of propagation potential in Iris aphylla L. The low percentage of germinating seeds largely limits its generative reproduction. The germination tests confirmed deep dormancy of the Iris aphylla seeds. The dormancy was disrupted by isolation of embryos from seeds, which were further cultivated in vitro. The germination of isolated embryos proved the localization of endogenous inhibitors of germinating seeds of I. aphylla in the endosperm. The comparison of phytohormonal profiles of seeds, endosperm and embryos of I. aphylla and Iris sibirica, i.e. a species with a high percentage of germinating seed, revealed that the deep dormancy of I. aphylla seeds was associated with the balance between abscisic acid and gibberellins (ABA/GA), a significant predominance of ABA and a massive accumulation of salicylic acid. Isolation of embryos from seeds and their germination in growing medium in vitro is recommended as the most efficient method for I. aphylla propagation. Results of this study can be applied in conservation efforts of this attractive and important native species
Short-term effects of brassica cover crops on soil quality indicators in organic production in high tunnels
Get PDFThe use of cover crops is aimed at sustaining soil health and productivity in the context of agricultural intensification and accompanying soil degradation. While cover crops have been extensively studied in field production systems, limited research has been conducted concerning their application in high-tunnel vegetable production. This study aimed to assess the effects of turnip (Brassica napus subsp. napobrassica (L.) Jafri) and swede Brassica rapa subsp. Rapifera Metzg) cover crops (CCs) on soil physicochemical and biological properties in an organic high tunnel system in southern Poland in 2017–2019. The planting sequence was as follows: winter cover crops/pumpkin/romaine lettuce/broad bean/chilli pepper. Soil analyses included measurements of bulk density, water capacity, soil aggregation, soil organic carbon (SOC), available soil nutrients, as well as microbial abundance and diversity. Rape crops produced a higher aboveground dry biomass (4.11 t ha−1) than swede (2.85 t ha−1), and the N content in their biomass was 101 kg N ha−1 and 75 kg N ha−1, respectively. The results presented that CC residue significantly contributed to soil organic carbon stock, retention of plant-available nitrogen, and improvement of soil physical properties, especially wet aggregate stability. Soils with the highest SOC concentrations were associated with the highest bacterial and fungal abundance. The most significant number of mesophilic bacteria was detected in the soil where turnip was grown as a cover crop (7.6 × 107 cfu g−1 DM soil). Moreover, a higher abundance of the tested nitrogen cycle bacteria was found in the soils after CC cultivation compared to the control soils, particularly bacteria reducing NH4 +-N and NO₃⁻-N. These findings highlight the importance of cover crop management practices in high tunnels, as they influence the composition of the total bacterial community and the abundance of N-cycling microbial guilds.The use of cover crops is aimed at sustaining soil health and productivity in the context of agricultural intensification and accompanying soil degradation. While cover crops have been extensively studied in field production systems, limited research has been conducted concerning their application in high-tunnel vegetable production. This study aimed to assess the effects of turnip (Brassica napus subsp. napobrassica (L.) Jafri) and swede Brassica rapa subsp. Rapifera Metzg) cover crops (CCs) on soil physicochemical and biological properties in an organic high tunnel system in southern Poland in 2017–2019. The planting sequence was as follows: winter cover crops/pumpkin/romaine lettuce/broad bean/chilli pepper. Soil analyses included measurements of bulk density, water capacity, soil aggregation, soil organic carbon (SOC), available soil nutrients, as well as microbial abundance and diversity. Rape crops produced a higher aboveground dry biomass (4.11 t ha−1) than swede (2.85 t ha−1), and the N content in their biomass was 101 kg N ha−1 and 75 kg N ha−1, respectively. The results presented that CC residue significantly contributed to soil organic carbon stock, retention of plant-available nitrogen, and improvement of soil physical properties, especially wet aggregate stability. Soils with the highest SOC concentrations were associated with the highest bacterial and fungal abundance. The most significant number of mesophilic bacteria was detected in the soil where turnip was grown as a cover crop (7.6 × 107 cfu g−1 DM soil). Moreover, a higher abundance of the tested nitrogen cycle bacteria was found in the soils after CC cultivation compared to the control soils, particularly bacteria reducing NH4 +-N and NO₃⁻-N. These findings highlight the importance of cover crop management practices in high tunnels, as they influence the composition of the total bacterial community and the abundance of N-cycling microbial guilds
Preparaty pochodzenia roślinnego – ekologiczne narzędzie nowoczesnej strategii ochrony roślin przed grzybami chorobotwórczymi
Get PDFPlants are a valuable source of many bioactive compounds. Numerous scientific studies confirm the antimicrobial effect of plant extracts against many phytopathogens, including pathogenic fungi. Currently, the attention is mainly focused on the production of preparations of plant origin containing stable and biodegradable biologically active compounds to control plant diseases. They are also an alternative to the conventional method of protection against pathogens. This review includes the characteristics of the most popular herbal plants (tansy, yarrow, garlic, horseradish, nettle) and the bioactive compounds contained in them, as well as the possibility of their use in plant protection, especially for control of pathogenic fungi.Plants are a valuable source of many bioactive compounds. Numerous scientific studies confirm the antimicrobial effect of plant extracts against many phytopathogens, including pathogenic fungi. Currently, the attention is mainly focused on the production of preparations of plant origin containing stable and biodegradable biologically active compounds to control plant diseases. They are also an alternative to the conventional method of protection against pathogens. This review includes the characteristics of the most popular herbal plants (tansy, yarrow, garlic, horseradish, nettle) and the bioactive compounds contained in them, as well as the possibility of their use in plant protection, especially for control of pathogenic fungi
Black bean aphid populations and chlorophyll composition changes as responses of guelder rose to aphid infestation stress conditions
Get PDFAphis fabae Scop. is phloem-feeding insect that cause substantial damage to horticulare and agriculture worldwide due to feeding – related damage and the transmission of economically important plant viruses. These aphids cause a detrimental effects in attacked organs, like depletion of photoassimilates. Insect feeding can among others reduced chlorophyll catabolism. In the present investigations we determined the chlorophyll a and b levels (SPAD readings) in uninfested leaves and in Aphis fabae-infested leaves of Viburnum opulus shrubs, wild plants and garden variety, which were grown in green areas around Siedlce, east central Poland. Feeding by A. fabae affected chlorophyll a + b level. The insect feeding reduces the concentration of photosynthetic pigment in the infested shrubs. The level of chlorophyll in plants occupied by aphids was clearly lower than the level in plants where aphids were not found. We also found that chlorophyll levels increased with the progress of growing season, the level of chlorophyll differed between date of survey, being higher for the latest survey (mid-June) and that the place where the plant is located is important, wild V. opulus have slightly more level of chlorophyll compared to garden ones. Chlorophyll level might be useful as an indicator of plant responses to aphid damage.Aphis fabae Scop. is phloem-feeding insect that cause substantial damage to horticulare and agriculture worldwide due to feeding – related damage and the transmission of economically important plant viruses. These aphids cause a detrimental effects in attacked organs, like depletion of photoassimilates. Insect feeding can among others reduced chlorophyll catabolism. In the present investigations we determined the chlorophyll a and b levels (SPAD readings) in uninfested leaves and in Aphis fabae-infested leaves of Viburnum opulus shrubs, wild plants and garden variety, which were grown in green areas around Siedlce, east central Poland. Feeding by A. fabae affected chlorophyll a + b level. The insect feeding reduces the concentration of photosynthetic pigment in the infested shrubs. The level of chlorophyll in plants occupied by aphids was clearly lower than the level in plants where aphids were not found. We also found that chlorophyll levels increased with the progress of growing season, the level of chlorophyll differed between date of survey, being higher for the latest survey (mid-June) and that the place where the plant is located is important, wild V. opulus have slightly more level of chlorophyll compared to garden ones. Chlorophyll level might be useful as an indicator of plant responses to aphid damage
Effects of salicylic acid application on germination, growth and development of rough lemon (Citrus jambhiri Lush.) under salt stress
Get PDFRough lemon (Citrus jambhiri Lush.) – RL, is used as a rootstock for citrus plants in saline conditions. NaCl causes an osmotic stress on plants mainly preventing the water uptake by the roots and thus reducing the plant growth. The objective of this study was to determine the effects of salicylic acid (SA) on germination of seeds and the growth and development of seedlings of RL rootstock under salt stress. For seed germination, a study was conducted in a completely randomized design in a 4 × 4 factorial scheme (SA at 0.00, 0.25, 0.50, or 1.00 mM and NaCl at 0, 50, 100, or 200 mM) with 4 repetitions, totaling 64 plots, of 25 seeds per plot. RL seeds were incubated in SA solutions for 24 h. Then, they were treated with NaCl-containing water in Petri dishes and incubated in the growth chamber at 25°C. For greenhouse experiment, a study was conducted in a randomized complete block in a 4 × 4 factorial scheme (SA at 0.0, 0.5, 1.0, or 2.0 mM and NaCl at 0, 50, 100, or 150 mM) with 3 repetitions, totaling 48 plots, of 2 plants per plot. Some morphological and physiological characteristics were determined. While germination time was extended, germination ratio and radicle extension were decreased in seeds under salt stress compared to control. Moreover, in these conditions the leaf membrane permeability and leaf falling were increased. In turn, plant height, diameter, root and shoot dry weight, leaf relative water content, and leaf chlorophyll were decreased in seedlings. Salt stress had negatively affected seed germination from 97.5% in control to 23.5% in 200 mM NaCl. However, SA treatments significantly decreased plant height to 67.8 cm in 2.0 mM compared to 80.1 cm in control in RL rootstock.Rough lemon (Citrus jambhiri Lush.) – RL, is used as a rootstock for citrus plants in saline conditions. NaCl causes an osmotic stress on plants mainly preventing the water uptake by the roots and thus reducing the plant growth. The objective of this study was to determine the effects of salicylic acid (SA) on germination of seeds and the growth and development of seedlings of RL rootstock under salt stress. For seed germination, a study was conducted in a completely randomized design in a 4 × 4 factorial scheme (SA at 0.00, 0.25, 0.50, or 1.00 mM and NaCl at 0, 50, 100, or 200 mM) with 4 repetitions, totaling 64 plots, of 25 seeds per plot. RL seeds were incubated in SA solutions for 24 h. Then, they were treated with NaCl-containing water in Petri dishes and incubated in the growth chamber at 25°C. For greenhouse experiment, a study was conducted in a randomized complete block in a 4 × 4 factorial scheme (SA at 0.0, 0.5, 1.0, or 2.0 mM and NaCl at 0, 50, 100, or 150 mM) with 3 repetitions, totaling 48 plots, of 2 plants per plot. Some morphological and physiological characteristics were determined. While germination time was extended, germination ratio and radicle extension were decreased in seeds under salt stress compared to control. Moreover, in these conditions the leaf membrane permeability and leaf falling were increased. In turn, plant height, diameter, root and shoot dry weight, leaf relative water content, and leaf chlorophyll were decreased in seedlings. Salt stress had negatively affected seed germination from 97.5% in control to 23.5% in 200 mM NaCl. However, SA treatments significantly decreased plant height to 67.8 cm in 2.0 mM compared to 80.1 cm in control in RL rootstock
The optimization growth of Dracocephalum forrestii in RITA® bioreactor, and preliminary screening of the biological activity of the polyphenol rich extract
Get PDFDracocephalum forrestii is a medicinal plant growing in China. The aim of the present study was to large-scale cultivation of D. forrestii transformed shoots in a temporary immersion system based on previously-optimized Murashige and Skoog (MS) medium supplemented with 0.5 mg/L N-benzyl-9-(2-tetrahydropyranyl)-adenine (BPA) and 0.2 mg/L indole-3-acetic acid (IAA) and physical (under blue LED) conditions. Shoot proliferation, and biomass and secondary metabolite accumulation in the shoots were assessed after a three-week growth period in a RITA® bioreactor. The levels of polyphenols in four types of extract (hydromethanolic extracts – mixtures with a 20%, 50%, and 80% methanol content and infusion) were determined using high-performance liquid chromatography (HPLC). Within three weeks, the culture increased its biomass 283-fold, with a proliferation ratio of 40.5 shoots or/and buds per explants. The most efficient solvent for extraction of phenolic compounds from raw material turned out to be 80% methanol solution; the highest polyphenol content was 40 mg/g DW (dry weight) with acacetin rhamnosyl-trihexoside (12.97 mg/g DW) and rosmarinic acid (10.68 mg/g DW) predominating. The intensive growth of the biomass of the culture allowed 570 mg of polyphenolic compounds to be obtained per liter of the medium. The antioxidant potential of extract of D. forrestii shoots was evaluated using three free radical-scavenging tests, and the inhibition of lipid peroxidation assay. In the study, the cytotoxic, antibacterial and antifungal potentials of the extract were also determined.Dracocephalum forrestii is a medicinal plant growing in China. The aim of the present study was to large-scale cultivation of D. forrestii transformed shoots in a temporary immersion system based on previously-optimized Murashige and Skoog (MS) medium supplemented with 0.5 mg/L N-benzyl-9-(2-tetrahydropyranyl)-adenine (BPA) and 0.2 mg/L indole-3-acetic acid (IAA) and physical (under blue LED) conditions. Shoot proliferation, and biomass and secondary metabolite accumulation in the shoots were assessed after a three-week growth period in a RITA® bioreactor. The levels of polyphenols in four types of extract (hydromethanolic extracts – mixtures with a 20%, 50%, and 80% methanol content and infusion) were determined using high-performance liquid chromatography (HPLC). Within three weeks, the culture increased its biomass 283-fold, with a proliferation ratio of 40.5 shoots or/and buds per explants. The most efficient solvent for extraction of phenolic compounds from raw material turned out to be 80% methanol solution; the highest polyphenol content was 40 mg/g DW (dry weight) with acacetin rhamnosyl-trihexoside (12.97 mg/g DW) and rosmarinic acid (10.68 mg/g DW) predominating. The intensive growth of the biomass of the culture allowed 570 mg of polyphenolic compounds to be obtained per liter of the medium. The antioxidant potential of extract of D. forrestii shoots was evaluated using three free radical-scavenging tests, and the inhibition of lipid peroxidation assay. In the study, the cytotoxic, antibacterial and antifungal potentials of the extract were also determined
Transcriptome analysis of genes involved in flower and leaf color of Oncidium by RNA-seq
Get PDFOncidium, an important tropical orchid, has high ornamental value due to its specific color and occupies a significant market position for the worldwide flower. Transcriptome analysis of flower and leaf color formation provides new sources for producing novel Oncidium hybridum cultivars. We sequenced 12 samples of flowers (yellow and white) and leaves (striped and regular) of O. hybridum and assembled 381,136 and 453,566 unigene sequences from RNA-seq data, respectively. Among unigenes, 662 and 1,324 differentially expressed genes were identified in flower and leaf samples, respectively. Gene ontology and pathway enrichment showed that secondary metabolite biosynthetic pathways were responsible for flower and leaf color formation. It was determined that UGT75C1, E2.4.1.115, CCD7, E2.1.1.76, and CCoAOMT are involved in regulating flower color, and UGT75C1, LHCB, UGT, RP-L18Ae, and ABCB1 play crucial roles in regulating leaf color. Kyoto Encyclopedia of Genes and Genomes analysis revealed that UGT75C1 was significantly enriched in the anthocyanin biosynthetic pathway, showing effects on flower and leaf colors. This study was the first detailed analysis of the molecular mechanisms of O. hybridum flower and leaf colors, and the results advanced the understanding of the genetic basis of flower and leaf colors; they also provided additional support for improving commercial value and producing novel cultivars of O. hybridum.Oncidium, an important tropical orchid, has high ornamental value due to its specific color and occupies a significant market position for the worldwide flower. Transcriptome analysis of flower and leaf color formation provides new sources for producing novel Oncidium hybridum cultivars. We sequenced 12 samples of flowers (yellow and white) and leaves (striped and regular) of O. hybridum and assembled 381,136 and 453,566 unigene sequences from RNA-seq data, respectively. Among unigenes, 662 and 1,324 differentially expressed genes were identified in flower and leaf samples, respectively. Gene ontology and pathway enrichment showed that secondary metabolite biosynthetic pathways were responsible for flower and leaf color formation. It was determined that UGT75C1, E2.4.1.115, CCD7, E2.1.1.76, and CCoAOMT are involved in regulating flower color, and UGT75C1, LHCB, UGT, RP-L18Ae, and ABCB1 play crucial roles in regulating leaf color. Kyoto Encyclopedia of Genes and Genomes analysis revealed that UGT75C1 was significantly enriched in the anthocyanin biosynthetic pathway, showing effects on flower and leaf colors. This study was the first detailed analysis of the molecular mechanisms of O. hybridum flower and leaf colors, and the results advanced the understanding of the genetic basis of flower and leaf colors; they also provided additional support for improving commercial value and producing novel cultivars of O. hybridum
Comparative analysis of the biotechnological potential of Knautia drymeia Heuff. and K. macedonica Griseb
Get PDFThe present study of Knautia drymeia and K. macedonica is in line with the current trend of searching for new plant species that can potentially be used as medicinal herb materials. A comparative analysis of the morphological and anatomical structure of both species was performed together with the distribution of polyphenolic compounds, which was correlated with the tissue structure of plant organs. Quantitative phytochemical analyses were performed to supplement the biophysical analyses. Both species had a similar morphological, anatomical, and histological structure. Polyphenolic compounds were accumulated in the parenchyma tissue in an organ-specific mode, mainly in the leaves. The phytochemical analyses revealed organ- and species-dependent variations in the polyphenol content. Thus, the highest polyphenol amount was observed in the leaves, with equal levels of total polyphenols and phenolic acids in the leaves of K. macedonica and K. drymeia, respectively. The present study integrates morphological/histological analyses with investigations of the biotechnological/pharmaceutical potential of the studied plants and constitutes an innovative and holistic approach to the current research problem.The present study of Knautia drymeia and K. macedonica is in line with the current trend of searching for new plant species that can potentially be used as medicinal herb materials. A comparative analysis of the morphological and anatomical structure of both species was performed together with the distribution of polyphenolic compounds, which was correlated with the tissue structure of plant organs. Quantitative phytochemical analyses were performed to supplement the biophysical analyses. Both species had a similar morphological, anatomical, and histological structure. Polyphenolic compounds were accumulated in the parenchyma tissue in an organ-specific mode, mainly in the leaves. The phytochemical analyses revealed organ- and species-dependent variations in the polyphenol content. Thus, the highest polyphenol amount was observed in the leaves, with equal levels of total polyphenols and phenolic acids in the leaves of K. macedonica and K. drymeia, respectively. The present study integrates morphological/histological analyses with investigations of the biotechnological/pharmaceutical potential of the studied plants and constitutes an innovative and holistic approach to the current research problem