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Journal of Environmental Biology

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

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    Abstract - Issue Apr 2007, 28 (2)                                     Back


Artificial UV-B induced changes in pigmentation of marine diatom Coscinodiscus gigas


A. Yogamoorthi*

Centre for Futures Studies, Pondicherry University, Pondicherry-605 014, India

(Received: Decemebr 22, 2004 ; Revised received: May 01, 2005 ; Accepted: June 09, 2005)

Abstract: In vitro studies in marine diatom Coscinodiscus gigas revealed that artificial UV-B radiation (313 nm) at a dose level of 0.4W m-2 for a continuous period of 3 hours in a UV treatment chamber caused disbursement of chromatophores from their normal loci and resulted in clumping / aggregation of chromatophores exhibiting a phenomenon called UV-B induced syntrophism . It is also understood that such clumping could cause only insignificant reduction in photosynthetic oxygen release.

Key words: UV-B radiation, Marine diatom, Chromatophore distribution and changes


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