4 research outputs found
Effect of salt stress on Seedlings growth and ions homeostasis of soybean (Glysin max) Cultivars
No full textAbstract: This experiment was carried out in Islamic Azad university (Shoushtar Branch) for investigate effect of salt stress on seedling growth of soybean cultivars. The soybean cultivars (Hill, Klark and Williams) obtained from Iran seed and plant institute, Karaj, Iran. The experimental design was 2 factorial, arranged in completely randomized design with 4 replication. First factor was soybean cultivars and second factor was salt stress levels (0, 4, 8, 12 and 16ds/m NaCl solution). These salinity treatments named S0, S1, S2, S3 and S4. Results indicated salt stre ss led to decrease germination, seedling fresh weight, seedling growth and seedling K + percentage in dry matter but increase Mean germination time and seedling Na + percentage. Results showed cultivar Hill K + /Na + ratio was higher compared Williams and Klark. Results indicated under salt stre ss seedling growth of cultivar Hill was better compared other soybean cultivars
The effect of growth regulators and irrigation on remobilization and grain filling of bread wheat in tropical climatic conditions
No full textTo study the remobilization rate affected by growth regulators in wheat a field experiment was carried out in the south of Iran over 2017-2019 with a split-split plot design and three iterations in completely randomized blocks. The main plots were two irrigation regimes (full irrigation and irrigation interruption at the grain-filling stage), two wheat cultivars (Chamran 2 and Durum Karkheh cv.s) were as sub plots, and four growth regulators (control (no growth regulator), salicylic acid, jasmonic acid, and cytokinin) placed in sub-sub plots. Results revealed the significant impact of the triple interaction on grain yield. The highest grain yield (4803 kg/Ha) was observed for Chamran 2 cv. treated with complete irrigation and salicylic acid. Although grain yield declined by 15.5% in the Karkheh cv. with irrigation interruption at the grain-filling stage and non-administration of growth regulators, treatment with salicylic acid managed to attenuate the adverse impact of drought stress in grain yield. The highest current photosynthesis and its contribution were observed in cultivars treated with complete irrigation. Moreover, irrigation regimen and growth regulators each had significant impacts on proline, catalase enzyme, and stomatal conductance. Overall, results suggested that using salicylic acid in Chamran 2 cv. would be advisable to increase growth and grain yield and reduce decline under stress
The Effect of Hypericum Perforarum on Anxiety and Depressant Activity in Wistar Rats Exposed to Phenol
No full textIntroduction: For a Long time, anxiety has been an important issue in psychology and different drugs have been applied to treat it. Various studies have demonstrated that the plant Hypericum perforatum has an antidepressant effect. With the industrialization of human societies, pollutants like phenol can be entered in the life cycle that have adverse effects on body organs. Therefore, this study aimed to investigate the antianxiety and antidepressant effects of Hypericum Perforarum extract in rats that were exposed to phenol.
Methods: In this study, 54 Wistar rats were used in terms of a 3×3 factorial design with 3 levels of Hypericum perforatum extract (0, 250 and 500 mg/kg.bw) and 3 levels of phenol (0, 100 and 200 mg/kg.bw). Rats received the extract and phenol every other day via gavage method for periods of 15 and 30 days, respectively. Thirty min after each gavage, a behavior test was performed by using the open field and elevated plus-maze. Recuperative effects of Hypericum perforatum were assessed within short (first 15 days) and long (second 15 days) periods.
Results: The statistic findings indicated that there were no significant differences between behavior tests with respect to the treatments (P> 0.05).
Conclusion: The study results proposed that the used levels of Hypericum Perforarum extract did not show any significant effects on reduction of anxious and depressant behaviors in phenol exposed Wistar rats
Feasibility Study on Reducing Lead and Cadmium Absorption by Alfalfa (Medicago scutellata L.) in a Contaminated Soil Using Nano-Activated Carbon and Natural Based Nano-Zeolite
No full textThe first risk posed by heavy metal pollution in an ecosystem is metal accumulation in the biomass of growing plants, which has harmful effects on human health. Natural-based nanoparticles are efficient in remediating environmental pollutants because they have a high surface/volume ratio, high chemical activity and produce no harmful side-products. The present study investigates the capacity of natural-based nano-porous adsorbents for reducing the availability of heavy metals to annual alfalfa (Medicago scutellata L.) roots and keeps them in soil. In a factorial experiment based on a randomized design (with four replications), three nano-adsorbents (nano-activated carbon, natural nano-zeolite and modified nano-zeolite) and two heavy metals (lead and cadmium) have been tested. The results demonstrated that applying the highest rate of activated carbon and modified nano-zeolite reduced shoot Pb content by 34% and 33.2%, and shoot Cd content by 35.5% and 46.7%, respectively, compared with the adsorbent-free control
