地中海扇藻叶绿体制剂中 pH 值对 CO(2)光合作用产物的影响。
The Effect of pH on the Products of Photosynthesis in CO(2) by Chloroplast Preparations from Acetabularia mediterranea.
机构信息
Department of Biology, Queen's University, Kingston, Ontario, Canada.
出版信息
Plant Physiol. 1971 Jun;47(6):779-83. doi: 10.1104/pp.47.6.779.
Abstract
The effect of pH on the pathways of carbon in photosynthesis was examined in chloroplast preparations from Acetabularia mediterranea. The flow of carbon into a number of photosynthetic intermediates, particularly sucrose, glycine, serine, glycolate, and the insoluble fraction, was strongly influenced by pH. At higher pH a much larger portion of the (14)C entered intermediates of the glycolate pathway. Although maximal apparent photosynthesis occurred at pH 7.6 to 7.7, cytoplasmic pH was found to be 8.0 to 8.4, using indicators. The pattern of distribution of (14)C in intermediates of whole cells was closest to that in chloroplasts at the higher pH range.
摘要
我们用地中海扇藻的叶绿体制剂研究了 pH 对光合作用碳途径的影响。碳进入一些光合作用中间产物（特别是蔗糖、甘氨酸、丝氨酸、乙醇酸和不溶性部分）的流动情况受 pH 的强烈影响。在较高的 pH 值时，更多的 (14)C 进入乙醇酸途径的中间产物。虽然最大的表观光合作用出现在 pH7.6 到 7.7，但用指示剂发现胞质 pH 值为 8.0 到 8.4。整个细胞中间产物中 (14)C 的分布模式在较高的 pH 范围内与叶绿体最接近。
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