Herbal
Fatemeh Nejad-Alimoradi; farkhondeh rezanejad
Abstract
Introduction: Leptadenia pyrotechnica is a medicinal, evergreen and drought-resistant plant that can grow in hot and dry areas in the south of Kerman province with high biomass production, so it plays an important role in preserving the soil and environment. It can be a potential source for secondary ...
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Introduction: Leptadenia pyrotechnica is a medicinal, evergreen and drought-resistant plant that can grow in hot and dry areas in the south of Kerman province with high biomass production, so it plays an important role in preserving the soil and environment. It can be a potential source for secondary metabolites. Methods: In this research, the soil ecological factors of plant distribution areas, plant morphology and some antioxidant compounds in different plant organs were investigated. Results and discussion: The soil analysis of the distribution areas of the plant showed that sandy, non-saline to moderately saline soil with neutral to slightly alkaline acidity and containing sufficient amounts of necessary mineral elements is suitable for the growth of this plant. The presence of relatively thick perianth with a lot of trichomes is one of the adaptive features of the plant against environmental stress conditions. The remarkable features of the reproductive system of the plant, including the Gynostegium and Pollinarium system and their role in pollination, show the evolutionary and advanced features of the plant. The highest content of total phenol, total flavonoid and total anthocyanin was observed in flower, seed and shoot, respectively. The variety and amount of phenolic and flavonoid compounds detected in different parts of the plant were different, the main phenolic compound in the shoot, fruit and seed was gallic acid and in the flower, hesperidin. Considering that different organs of this plant species are rich in phenolic compounds; therefore, this species is recommended for use in the pharmaceutical industry.
Herbal
Hamid Reza Darafshi; Seied Mohammad Javad Arvin; Fatemeh Nejad-Alimoradi
Abstract
Introduction: Brassinosteroids play an important role in plant growth and development. Seedling is one of the most important factors affecting plant establishment and crop production. Methods: The effects of tomato seed pretreatment with 24-Epibrassinolide (EBL) on germination indicators, seedling growth ...
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Introduction: Brassinosteroids play an important role in plant growth and development. Seedling is one of the most important factors affecting plant establishment and crop production. Methods: The effects of tomato seed pretreatment with 24-Epibrassinolide (EBL) on germination indicators, seedling growth in the greenhouse and the effect of foliar spraying on plant growth and yield in the field were investigated. The treatments in the germination and seedling production stage included seed soaking (priming) in distilled water (control) and EBL solution with concentrations of 0.25, 0.5 and 0.75 μM for 24 hours. Seedlings obtained by seed priming in EBL (0, 0.5 and 0.75 μM) were transferred to the field and after one month, they were sprayed with concentrations of 0, 0.5 and 0.75 μM. Results and discussion: compared to the control, EBL increased the percentage and speed of seed germination and all physiological and growth parameters, and the effect of 0.75 μM was more significant. The effect of EBL on the measured parameters in the field was also very impressive. Although the effect of seed priming alone in all treatments was significantly better than the foliar spraying alone in all stages, but the combination of these two treatments in both concentrations of 0.5 and 0.75 μM was more significant than seed priming or foliar spraying treatments. Tomato production from the combination of seed priming along with foliar spraying increased by 74% at 0.5 μM and 145% at 0.75 μM concentration compared to the control.
Herbal
Fatemeh Nejad-Alimoradi; Fatemeh Nasibi; Mahboobeh Sheikhbahaei
Abstract
Introduction: The positive potential of brassinosteroids and polyamines as protective agents for environmental stresses has been proven. Methods: In this study, Cucurbita pepo was pretreated with 24-epibrasinolide (EBL) (0, 0.01 and 0.1 μM) and spermine (0, 0.1 and 1 mM) and then salinity treatment ...
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Introduction: The positive potential of brassinosteroids and polyamines as protective agents for environmental stresses has been proven. Methods: In this study, Cucurbita pepo was pretreated with 24-epibrasinolide (EBL) (0, 0.01 and 0.1 μM) and spermine (0, 0.1 and 1 mM) and then salinity treatment (0, 40 and 80 mM sodium chloride) was applied. Results and discussion: Salinity stress decreased dry weight, potassium and calcium content and increased sodium content. EBL and Spm increased potassium, calcium and decreased sodium in shoots. Salinity stress increased root SOS1 gene expression and had no effect on NHX1 gene expression. EBL and Spm decreased expression of SOS1 gene while Spm increased expression of NHX1 gene. Therefore, it seems that Spm via the over-expression of the NHX1 gene substantially increased the tolerance to stress by sequestering excess Na+ into the vacuoles and sustaining a better cellular environment for improvement of plant growth under salinity stress.
