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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Jul 2010, 31 (4)                                                                                                             Back



Abstract _23

Biochemical responses and accumulation of cadmium? in Spirodela polyrhiza

 

N.M. Rolli*2, S.S. Suvarnakhandi2, G.S. Mulgund1, R.H. Ratageri3 and T.C. Taranath1

1Environmental Biology Laboratory, Department of Botany, Karnataka University, Dharwad - 580 003, India

2Bldea?s Comm, BHS Arts and TGP Science College, Jamakhandi - 587 301, India

3Department of Botany, Govt. Science College, Chitradurga - 577 501, India

(Received: March 31, 2009; Revised received: August 31, 2009; Accepted: September 25, 2009)

 

Abstract: The present study focused on biochemical responses of Spirodela polyrhiza to cadmium stresses and its accumulation. The laboratory experiments were conducted for the assessment of biochemical responses and accumulation of cadmium in plants at its various concentrations (0.1, 0.5, 1.5 and 2.0 ppm) at the regular interval for twelve days exposure. Spirodela showed visible symptoms like withering of roots and chlorosis at? higher concentration (2.0 ppm), however the plant showed normal growth at lower concentration (0.1 ppm). The estimation of biochemical parameters? (total chlorophyll, protein and carbohydrate) of test plants showed a significant increase at lower concentration (0.1 ppm) of cadmium. The biochemical changes decrease with increase in exposure concentration and duration. The toxic effect of cadmium is directly proportional to its concentration and duration. The accumulation? of cadmium by Spirodela polyrhiza was maximum at four days exposure duration and gradually decreases.

Key words: Cadmium, Accumulation, Toxicity, Biochemical parameters

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