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IJMS Vol.31(4) [December 2002] >


Title:  Effect of ultraviolet-B radiation on biochemical composition of three Ulva species (Chlorophyta) from southeast coast of India
Authors: Eswaran, K.
Ganesan, M.
Periyasamy, C.
Rao, P.V. Subba
Keywords: Ulva
UV-B
pigments
protein
NR activity
Issue Date: Dec-2002
Publisher: CSIR
Abstract: The young plants of Ulva fasciata, U. reticulata and U. lactuca were subjected to UV–B (320-280 nm) radiation for 30, 60, 90, 120, 150 and 180 min. The changes in chlorophylls, carotenoids, protein, nitrate contents and reductase activities were studied. Compared to control, in UV exposed plants both pigments and protein concentrations were significantly decreased. The magnitude of such decrease was higher in Ulva lactuca than in other two species. In contrast to this in vitro nitrate reductase activity was more severely affected in Ulva reticulata. The experiments clearly showed that the UV (A & B)-B radiation has a strong inhibitory effects on biochemical properties in all three Ulva species. However, the rate of inhibition is dependent on the duration of exposure of plants to UV (A & B)-B radiation.
Page(s): 334-336
ISSN: 0379-5136
Source:IJMS Vol.31(4) [December 2002]

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