Department of Biology, Brooklyn College, Brooklyn, New York 11210.
Plant Physiol. 1977 Sep;60(3):407-11. doi: 10.1104/pp.60.3.407.
The effect of various sugar phosphates on CO(2) fixation in Anabaena flos-aquae was investigated and found to be very similar to that found for isolated spinach chloroplasts. One exception, glucose 6-phosphate, has a stimulatory effect on CO(2) fixation in Anabaena but not in isolated chloroplasts.Further examination of the role of glucose 6-phosphate metabolism in Anabaena indicates that: (a) this sugar phosphate can be taken up; (b) its uptake is greater in the light than the dark; (c) turnover of glucose 6-phosphate is inhibited in the light; and (d) glucose 6-phosphate can support dark CO(2) fixation. These results are discussed with reference to photosynthesis-related control of glucose 6-phosphate metabolism and the role of glucose 6-phosphate as a source for reducing equivalents and ATP in blue-green algae.
研究了各种糖磷酸对鱼腥藻 CO2 固定的影响,结果发现它们与分离的菠菜叶绿体非常相似。一个例外是葡萄糖 6-磷酸,它对鱼腥藻 CO2 固定有刺激作用,但对分离的叶绿体没有作用。进一步研究葡萄糖 6-磷酸代谢在鱼腥藻中的作用表明:(a) 这种糖磷酸可以被吸收;(b) 在光下比在暗中吸收更多;(c) 葡萄糖 6-磷酸在光下的周转率受到抑制;(d) 葡萄糖 6-磷酸可以支持黑暗 CO2 固定。这些结果与光合作用相关的葡萄糖 6-磷酸代谢的控制以及葡萄糖 6-磷酸作为蓝藻中还原当量和 ATP 的来源的作用有关。