جستجوی مقالات مرتبط با کلیدواژه « آنزیم سوپراکسید دیسموتاز » در نشریات گروه « زیست شناسی »

In order to evaluate the effect of boron and jasmonic acid foliar application on maize, under different irrigation regimes, an experiment was conducted as split-split plots in the form of a randomized complete block design in three replications in the summer of 2021 in the Varamin. In this experiment, irrigation was arranged in four levels (as the main factor): complete irrigation, stopping irrigation at the 8-leaf stage, stopping irrigation at the stage of cob emergence, and stopping irrigation at the stages of 8 leaves and cob emergence. Boron foliar application at three levels, including spraying with pure water, spraying with 0.5% boron, spraying with a solution with 1% boron, and spraying with jasmonic acid solution in three levels, including spraying with pure water, spraying with a concentration of 50 µM jasmonic acid, and spraying with a concentration of 100 µM jasmonic acid, were considered in sub-plots. The results showed that stopping irrigation at different stages of growth caused a decrease in all tested traits. Also, the results show that the spraying of 1% boron increases grain yield (5.5%), 1000 seed weight (2.9%), biological yield (2.8%), carotenoid content (11.2%), and decreases 4.4% of leaf malondialdehyde. On the other hand, the use of 100 µM jasmonic acid increases leaf chlorophyll content (2.69%), leaf carotenoid content (2.94%), 1000-seed weight (1.29%), seed yield (2.67%), and biological yield (2.95%). Indeed, the use of jasmonic acid also reduced the damage caused by oxidative stress by increasing the amount of the superoxide dismutase enzyme.

In order to investigate the variation of some morphological, physiological and enzymatic characteristics of Zataria multiflora with the application of Humic acid and Fowlowic acid, as completely randomzed design with 7 treatments, 3 replicates and each replicate containing 3 units of plant, in total 63 units were evaluated. The treatments consisted of Humic acid and Fluvic acid with 3 levels of 25, 50 and 100 mg/L. Sparying the pots with the desired compounds were carried out three times in a week. Sampling and evaluation of the traits were carried out about two weeks after the last spraying. The evaluated traits included fresh and dry weight of shoot and root, total leaf chlorophyll, protein, superoxide dismutase enzyme activity, iron and nitrogen content. The results showed that Humic acid 100ppm treatment had the most effect on improving traits such as fresh weight of shoot and root, shoot and root dry weight, protein, superoxid dismutase enzyme activity and nitrogen content. Also Fluvic acid 100ppm treatment improvement of total leaf chlorophyll and iron content.