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21.
Rai A Tripathi P Dwivedi S Dubey S Shri M Kumar S Tripathi PK Dave R Kumar A Singh R Adhikari B Bag M Tripathi RD Trivedi PK Chakrabarty D Tuli R 《Chemosphere》2011,82(7):986-995
World wide arsenic (As) contamination of rice has raised much concern as it is the staple crop for millions. Four most commonly cultivated rice cultivars, Triguna, IR-36, PNR-519 and IET-4786, of the West Bengal region were taken for a hydroponic study to examine the effect of arsenate (AsV) and arsenite (AsIII) on growth response, expression of genes and antioxidants vis-à-vis As accumulation. The rice genotypes responded differentially under AsV and AsIII stress in terms of gene expression and antioxidant defences. Some of the transporters were up-regulated in all rice cultivars at lower doses of As species, except IET-4786. Phytochelatin synthase, GST and γ-ECS showed considerable variation in their expression pattern in all genotypes, however in IET-4786 they were generally down-regulated in higher AsIII stress. Similarly, most of antioxidants such as superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), catalase (CAT), monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase (DHAR) increased significantly in Triguna, IR-36 and PNR-519 and decreased in IET-4786. Our study suggests that Triguna, IR-36 and PNR-519 are tolerant rice cultivars accumulating higher arsenic; however IET-4786 is susceptible to As-stress and accumulates less arsenic than other cultivars. 相似文献
22.
中国环境保护产业协会袋式除尘委员会 《中国环保产业》2007,(10):25-29
本文介绍了我国袋式除尘行业和袋式除尘技术2006年的发展情况,对目前存在的问题进行了分析,并提出了对策建议。 相似文献