Oxidative injury and antioxidant enzymes regulation in arsenic-exposed seedlings of four Brassica napus L. cultivars

Environmental Science and Pollution Research International
Muhammad A FarooqWeijun Zhou

Abstract

Environmental contamination due to arsenic (As) has become a major risk throughout the world; this affects plant growth and productivity. Its accumulation in food chain may pose a severe threat to organisms. The present study was carried out to observe the toxic effects of As (0, 50, 100, and 200 μM) on physiological and biochemical changes in four Brassica napus cultivars (ZS 758, Zheda 619, ZY 50, and Zheda 622). Results showed that As toxicity provoked a significant inhibition in growth parameters of B. napus cultivars and this reduction was more obvious in cultivar Zheda 622. The highest concentration of MDA, H2O2, and O2 (-) contents in both leaf and root tissues were observed at 200 μM As level, and a gradual decrease was observed at lower concentrations. Increasing As concentration gradually decreased chlorophyll and carotenoids contents. Activity of antioxidant enzymes such as SOD, CAT, APX, GR, and GSH was positively correlated with As treatments in all cultivars. The microscopic study of leaves and roots at 200 μM As level showed the disorganization in cell organelles. Disturbance in the morphology of chloroplast, broken cell wall, increase in size, and number of starch grains and immature nucleus were found in leaf u...Continue Reading

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Citations

Nov 5, 2015·Environmental Science and Pollution Research International·Muhammad RizwanYong Sik Ok
Jun 24, 2015·Ecotoxicology and Environmental Safety·Ihsan Elahi ZaheerRehan Ahmad
May 6, 2016·Frontiers in Plant Science·Muhammad A FarooqWeijun Zhou
Sep 18, 2016·Ecotoxicology and Environmental Safety·Theodore M MwambaWeijun Zhou
Jan 25, 2020·Bulletin of Environmental Contamination and Toxicology·Guiying YangChangqun Duan
Sep 14, 2019·International Journal of Environmental Research and Public Health·Aboubacar Younoussa CamaraHuafen Li
May 31, 2019·Journal of Plant Physiology·Aurélie SongyFlorence Fontaine

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