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Biography

Anil Barla is pursuing his second year of Ph.D. and AnamikaShrivastava is pursuing her third year of Ph.D. under the supervision of Dr. Sutapa Bose at IISER Kolkata. Dr. Sutapa Bose has completed her M.Phill and Ph.D. in 2003 and 2005 respectively from School of Environmental Sciences, JNU, New Delhi, India.Further, in career advancement she went to U.S.A to join the Lamont-Doherty Earth Observatory of Columbia University, New York, as Senior Researcher in 2009, further she joined New York University, New York as a Post-Doctoral Researcher in 2010. She moved back to India at IISER Kolkata, Department of Earth Sciences as Ramanujan Fellow in December 2011. Recently, she was selected for “RashtriyaGaurav Award” for her present research work from Indian International Friendship Society, New Delhi. She has published more than 25 research papers in reputed journals and has been serving as an editorial board members of many committee and journals.

Abstract

Agriculture in West Bengal (WB) is the means of livelihood of about 65% of the population of the state living in villages. The agricultural economy of the state is heavily dependent on the vagaries of monsoon with an average annual rainfall of 195.98 cm.Approximately 47% of the gross rice area is grown under rainfed condition. Rice is the main dietary source of arsenic consumption in this region where rice is a staple food. The presence of As in food through the water-soil crop routes has raised a worldwide concern in terms of food safety. This triggers a possible dietary risk to human health and also risk of environmental hazards. Accumulation of As by rice mostly depends on oxidation-reduction potential in plant and soil phosphate concentration, rhizosphere iron plaque formation, microbic activity, and rice selection.In spite of rice varieties, accumulation of As is observed approximately twenty eight times and seventy five folds higher in roots than that of shoot and raw rice of grain. The permissible limit of Asin rice grains is 1.0 mg Kg-1 as per World Health Organization. The present study was conducted in the months of August to November 2013 where the amon (monsoon) rice was collected to assess the arsenic concentration in different parts of rice plant. Mainly the mean arsenic concentration (mg/kg) in root of the matured plant was around 36 followed by straw, husk and grains as 16.28, 1.65 and 0.52 respectively. Thus, the present study reveals that rice grown in the study area is safe for consumption, for now. But, the arsenic accumulation in the crop should be monitored periodically as the level of arsenic toxicity in the study area is increasing day by day.Also consumption of rice straw containing considerable amount of arsenic by cattle could potentially lead to increased arsenic levels in meat or milk and thus posing threats to human health.

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