High growth rate, photosynthesis rate and increased hydrogen(ases) in manganese deprived cells of a newly isolated Nostoc-like cyanobacterium (SAG 2306)

Abdel-Basset, R., Friedl, T., Mohr, K. I., Rybalka, N. and Martin, W. (2011) High growth rate, photosynthesis rate and increased hydrogen(ases) in manganese deprived cells of a newly isolated Nostoc-like cyanobacterium (SAG 2306) International Journal of Hydrogen Energy, 36 (19). pp. 12200-12210. DOI 10.1016/j.ijhydene.2011.07.006.

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Abstract

A Nostoc-like cyanobacterium, strain SAG 2306, was isolated from a clay soil sample at Assiut region (Egypt). Morphology and analysis of 16S rDNA identified it as a member of the heterocyteous cyanobacteria (Nostocales). Unexpectedly, chlorophyll a and dry weight were higher in manganese deprived (Mn-) or in manganese double deprived (Mn-) than in replete (Mn+) cells. The latter phase of Mn- diluted the cellular content in daughter cells to a critical minimal value of about 1.5 relative to the original 100 in Mn+. Similar to growth, Nostoc sp. exhibited a significant age-dependent biphasic impact on hydrogenases activity. Older cells of 120 h age displayed higher hydrogen evolution rates than younger ones. The results suggest inhibitory effects of the 12 mu M manganese contained in BG11 medium (Mn+) not only on growth but also on hydrogen production during the first 72 h of growth. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Document Type: Article
Keywords: Manganese deprivation Photosynthesis Respiration Hydrogenases Nostoc superoxide-dismutase anabaena-variabilis mass-spectrometry water oxidation photosystem-ii waste-water hydrogenase chlamydomonas deficiency photoevolution
Refereed: Yes
DOI etc.: 10.1016/j.ijhydene.2011.07.006
ISSN: 0360-3199
Date Deposited: 01 Nov 2012 05:04
Last Modified: 01 Nov 2012 05:04
URI: http://eprints.uni-kiel.de/id/eprint/16593

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