Hydrogen evolution in relation to PSI-reducible substrates in the cyanobacterium Oscillatoria chalybea assayed by means of mass spectrometry

被引：6

作者：

Abdel-Basset, R. ^{[1
,2
]}

Bader, K. P. ^{[1
]}

机构：

[1] Univ Bielefeld, Fak Biol, Lehrstuhl Zellphysiol, D-33501 Bielefeld, Germany

[2] Assiut Univ, Fac Sci, Dept Bot, Assiut 71516, Egypt

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 11期

关键词：

hydrogen evolution; Oscillatoria chalybea; reducible substrates; ATP;

D O I：

10.1016/j.ijhydene.2008.03.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

None of the PS I-reducible molecules (nitrate, NAD or NADP) decreased H-2 evolution in Oscillatoria chalybea; indicating that their reduction would not compete with proton reduction. Seemingly, CO2 reduction does not compete as well. Only nitrite was accompanied with a strong and consistent inhibition most probably due to;a specific characteristic of the chemical rather than substrate competition. Such nitrite-induced inhibition could not be attributed to a lack in photosynthetic electrons since nitrite inhibited neither PS I nor PS II activity. ATP enhanced hydrogen evolution (about 50%) while NH4Cl in an uncoupling concentration was inhibitory; although in hydrogenases (other than nitrogenases) ATP is not directly involved (discussed). (c) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：2653 / 2659

页数：7

共 33 条

[1] Physiological analyses of the hydrogen gas exchange in cyanobacteria [J].