Sánchez O, Van Gemerden H, Mas J
Department of Genetics and Microbiology, Autonomous University of Barcelona, E-08193 Bellaterra, Spain.
Arch Microbiol. 1998 Nov;170(6):411-7. doi: 10.1007/s002030050661.
This study describes how the phototrophic organism Chromatium vinosum, when grown under different degrees of light limitation, distributes the reducing power initially present in the medium as hydrogen sulfide. Under all the conditions of illumination tested, sulfur was the major store of reducing power. Glycogen, which was virtually absent under light limitation, accounted for 31.6% of the stored reducing power at saturating irradiances. Analysis of the electron budget showed that under light-limiting conditions, an important fraction of reducing power did not appear in storage products or in structural cell material. Analysis of dissolved organic carbon in the supernatant of the culture indicated the excretion of organic compounds.
本研究描述了光合生物嗜硫色杆菌在不同程度的光照限制下生长时，如何分配最初以硫化氢形式存在于培养基中的还原力。在所有测试的光照条件下，硫是还原力的主要储存形式。在光照限制条件下几乎不存在的糖原，在饱和辐照度下占储存还原力的31.6%。电子收支分析表明，在光照限制条件下，很大一部分还原力并未出现在储存产物或细胞结构物质中。对培养物上清液中溶解有机碳的分析表明存在有机化合物的排泄。
