PMID: 9647800Jul 2, 1998Paper

Growth on urea can trigger death and peroxidation of the cyanobacterium Synechococcus sp. strain PCC 7002

Applied and Environmental Microbiology
T SakamotoD A Bryant

Abstract

Laboratory conditions have been identified that cause the rapid death of cultures of cyanobacteria producing urease. Once the death phase had initiated in the stationary growth phase, cells were rapidly bleached of all pigmentation. Null mutations in the ureC gene, encoding the alpha subunit of urease, were constructed, and these mutants were no longer sensitive to growth in the presence of urea. High levels of peroxides, including lipid peroxides, were detected in the bleaching cells. Exogenously added polyunsaturated fatty acids triggered a similar death response. Vitamin E suppressed the formation of peroxides and delayed the onset of cell bleaching. The results suggest that these cyanobacterial cells undergo a metabolic imbalance that ultimately leads to oxidative stress and lipid peroxide formation. These observations may provide insights into the mechanism of sudden cyanobacterial bloom disappearance in nature.

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Citations

Dec 10, 2013·Bioscience, Biotechnology, and Biochemistry·Chifumi KitazakiMunehiko Asayama
Mar 1, 2006·Applied Microbiology and Biotechnology·Bing-kun SunHajime Unno
Oct 2, 2007·FEMS Microbiology Reviews·Paula TamagniniPeter Lindblad
Jun 19, 2007·The Journal of General and Applied Microbiology·Kaori Inoue-SakamotoDonald A Bryant
Sep 26, 2019·Frontiers in Microbiology·Théo VeaudorFranck Chauvat
Oct 16, 2020·International Journal of Molecular Sciences·Haruhiko JimboHajime Wada
Jun 21, 2005·Plant Physiology·Hiroshi MaedaDean Dellapenna
Mar 5, 2002·Microbiology and Molecular Biology Reviews : MMBR·Paula TamagniniPeter Lindblad

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