Vol. 2, Issue 4 (2017)
Arsenic effect on morphology and rate limiting step of Nitrate assimilation pathway of Phaseolus vulgaris
Author(s): Yasmin Bano, Shiv Kumar Jayant, Jot Sharma, Archana Shrivastava
Abstract: Arsenic is one of the oldest and most toxic heavy metal in the earth’s crust and biosphere. As exists in the environment in various organic and inorganic forms. Due to greater cellular uptake, inorganic As+3 is 60 times more soluble, mobile and toxic form then As+5. In plants, As is accumulated according to tolerance. In general, with increasing Assoil, there was a concomitant increase in As plant, results in growth inhibition, low fruit yield, physiological disorders and finally their death. Growth inhibition is one of the important manifestations of As-induced toxicity in plants. Most significant percent germination as well as seed germination retardation pronounced in 1mM when sand was treated with 0.001, 0.01, 0.1 and 1mM concentrations. Highest Nitrate activity and endogenous pool activity found more significant at 0.01mM. The effect of As on chlorophyll was increased with increased concentrations. Total chlorophyll concentration was inhibited ranged from 42.45% to 86.98%. Therefore the present study will definitely help in assessing/evaluating the effect of As on overall productivity of important crops and detoxification of As by phytochela¬tin synthesis in As enriched soil.