Effects of Paclobutrazol on Nutrients, Zinc and Chromium Accumulation and Antioxidant Enzymes of Soybean
In order to investigate the physiological effects of paclobutrazol on soybean growing in zinc-chromium contaminated soils,the nutrient,zinc chromium absorption and antioxidant enzyme system of soybean seed soaking with different concentrations(0,100,250,400,600 mg· L-1) of paclobutrazol were studied by a pot experiment.The results showed that the effects of paclobutrazol on the accumulation of N and P in soybean organs were not significant,but the appropriate concentration of paclobutrazol could increase the accumulation of K;250 mg · L-1 soaking of paclobutrazol could increase the accumulation of Zn and Cr in soybean underground part(root and nodule),and reduce the accumulation in overground part (stems and leaves).Appropriate concentration of paclobutrazol could enhance soybean antioxidant enzyme activities and significantly decrease the content of MDA.In summary,soybean growing in zinc and chromium contaminated soil under the treatment of appropriate concentration of paclobutrazol could reduce the accumulation of Zn and Cr of overground part,increase the accumulation of Zn and Cr of underground part,improve nutrient absorption capacity and antioxidant enzyme activities,and alleviate the membrane lipid peroxidation damage by heavy metals Zn and Cr.But the effects of different paclobutrazol concentrations on the heavy metal absorption and physiological characteristics in soybean organs were different,and the treatment with 250 mg·L-1 soaking concentrationhad the best comprehensive effect.This study provides a scientific basis for the safe production of soybean growing in heavy metals contaminated soil by the soaking of paclobutrazol.
国家科技期刊平台
NSTL
万方数据
维普
