Year: 2011
Type: article
Abstract: The present study was designed to evaluate the effect of lead (Pb) and combine effect of Pb with brassinolide (BL) on thegrowth, metabolite contents and enzyme activities in radish plants. Pb suppressed the growth of the radish plants, reduced netphotosynthesis rate and soluble sugar levels. Activities of nitrate reductase in radish plants were also reduced under Pb stress.However seed treatment with BL mitigated the adverse effects of Pb and stimulated the growth of radish plants. The growthpromotion was associated with enhanced rate of photosynthesis and elevated levels of reducing and total sugars and nitratereductase activities in radish plants under Pb stress. Under Pb stress, reactive oxygen species (ROS) levels and lipid peroxidationwere increased in radish plants, which were significantly inhibited by BL application. The activities of antioxidant enzymes suchas peroxidase, ascorbate peroxidase and superoxide dismutase were increased during metal stress. Treatment with BL furtherincreased the activity of ascorbate peroxidase, catalase and superoxide dismutase. The BL treatment also enhanced glutathionereductase activity under stress. From the results it can be concluded that BL could play a positive role in the alleviation of oxidativestress caused by ROS by enhancing antioxidant defense system, thus improving the tolerance of radish plants to Pb stress
Authors: S. Anuradha, S. Eeta, R.G.S. Rao
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2184986217