| Adaptation strategies of the sheathed cyanobacterium Lyngbya majuscula to ultraviolet-B. | |
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MedLine Citation:
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PMID: 20970352 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Lyngbya majuscula is a dominant organism in the east coast of India forming characteristic mat in dried saline soils simultaneously exposed to solar radiation of the tropics. Studies on the growth response, changes in the spectral properties of the methanolic extract and protein profile of this estuarine sheathed cyanobacterium to UV-B revealed existence of effective adaptation mechanism to withstand prolonged UV-B radiation. Carotenoids along with MAAs of the organism was increased with increase in UV irradiation. Increase in thickness of the mucilaginous sheath layer as well as cellular carbohydrate content was observed upon exposure to prolonged UV-B dose. Induction of 21 and 33kDa low molecular weight proteins, and a 99kDa protein together with formation of distinct multilayered sheath embedding trichomes with granulated cells were the adaptive features of the organism to cope with UV-B stress. The organism was considerably revived after incubating the irradiated cells in mineral medium under florescent light and in the dark suggesting existence of photoreactivation and dark repair in this cyanobacterium. However more experiments are needed to establish the existence of photoreactivation and dark repair mechanism in the studied cyanobacterium. |
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Authors:
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Sikha Mandal; Jnanendra Rath; Siba Prasad Adhikary |
Publication Detail:
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Type: Journal Article Date: 2010-10-08 |
Journal Detail:
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Title: Journal of photochemistry and photobiology. B, Biology Volume: 102 ISSN: 1873-2682 ISO Abbreviation: J. Photochem. Photobiol. B, Biol. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804966 Medline TA: J Photochem Photobiol B Country: Switzerland |
Other Details:
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Languages: eng Pagination: 115-22 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Botany, Visva-Bharati University, Santiniketan 731 235, India. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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