Kamboj, RituVishwakarma, Gajendra SinghSharma, ShilpaMittal, Sunil2017-08-212024-08-142017-08-212024-08-142016Kamboj, R. Singh, Vishwakarma, GS. Sharma, A. Mittal, Sunil. (2016) Arsenic Induced Alteration in Macromolecule Concentration and Antioxidant System in Two Improved Rice Varieties. Indian Journal Of Natural Sciences. 6(36).Print- 0976-0997http://10.2.3.109/handle/32116/354Arsenic contamination of rice has been highlighted as major issue throughout the world as it is a staple food for millions. The aim of study was to analyze the effect of different concentration of arsenic on the germination, physiology, macromolecules concentration and antioxidant enzymes in improved varieties of rice. In vitro study indicates that the lower concentration of arsenate had a stimulating effect on germination, chlorophyll content as well as respiratory content while an inhibitory effect at higher concentration. Roots were more affected than shoots. Further, the content of macromolecules (carbohydrate and protein) was elevated while the activities of their hydrolyzing enzymes (α, β amylase and protease) were declined on arsenic stress. The significant elevation in the activity of superoxide dismutase and peroxidase enzymes also proved the generation of reactive oxygen species due to the arsenic toxicityen-USArsenicα-amylaseβ-amylaseperoxidasericesuperoxide dismutaseArticle