Document Detail

Involvement of digalactosyldiacylglycerol in cellular thermotolerance in Synechocystis sp. PCC 6803.
MedLine Citation:
PMID:  19468713     Owner:  NLM     Status:  MEDLINE    
The effects of digalactosyldiacylglycerol (DGDG) deficiency on photosynthesis at high temperatures were examined using a dgdA mutant of Synechocystis sp. PCC 6803 incapable of DGDG biosynthesis. The dgdA mutant cells showed significant growth retardation when the temperature was increased from 30 to 38 degrees C, although wild-type cells grew normally. The degree of growth retardation was enhanced by increasing light intensity. In addition, dgdA mutant cells showed increased sensitivity to the photoinhibition of photosynthesis when illuminated at 38 degrees C. Analysis of photosynthesis in intact cells suggested that the inhibition of repair processes and accelerated photodamage resulted in growth retardation in dgdA mutant cells at high temperatures.
Naoki Mizusawa; Shinya Sakata; Isamu Sakurai; Naoki Sato; Hajime Wada
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-05-26
Journal Detail:
Title:  Archives of microbiology     Volume:  191     ISSN:  1432-072X     ISO Abbreviation:  Arch. Microbiol.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-06-22     Completed Date:  2009-07-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0410427     Medline TA:  Arch Microbiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  595-601     Citation Subset:  IM    
Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan.
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MeSH Terms
Galactolipids / biosynthesis*
Hot Temperature*
Hydroxylamine / pharmacology
Photosystem II Protein Complex / drug effects
Stress, Physiological
Synechocystis / genetics,  growth & development*,  metabolism
Reg. No./Substance:
0/Galactolipids; 0/Photosystem II Protein Complex; 0/digalactosyldiacylglycerol; 7803-49-8/Hydroxylamine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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