Biophysical Characterization of Heavy Metal Stress in Spirodela polyrhiza (L.) Schleid

Authors: Hanwant Singh, Deepak Kumar and Vineet Soni*

DOI: 10.23880/psbj-16000161

Volume 5, Issue 1

Abstract

In the present investigation the effect of heavy metal stress on photosynthetic performance of Spirodela polyrhiza was studied. The photosynthetic activity was measured by using chlorophyll a fluorescence analysis. S. polyrhiza were treated with various concentrations of HgCl2 (0, 0.2, 0.4 and 0.6 μM). After 48-hour, various fluorescence parameters (Fm. Fv/Fm and PIcsm) and chlorophyll a content were measured. Results show that with increasing the metal concentration, fluorescence parameters and chlorophyll a content were decreased. The study reveal that heavy metal decreased the photosynthetic activity of S. polyrhiza.

Keywords: S. polyrhiza; Fm; Fv/Fm; Chlorophyll a fluorescence; Performance index

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