蓝藻异形胞中光合培养物的年龄与光合作用光系统II色素产生之间的关系。
Relationship between age of culture and occurrence of the pigments of photosystem II of photosynthesis in heterocysts of a blue-green alga.
作者信息
Thomas J
出版信息
J Bacteriol. 1972 Apr;110(1):92-5. doi: 10.1128/jb.110.1.92-95.1972.
Abstract
Microspectrophotometric examination of the pigments in vivo of heterocysts of Anabaena sp. L-31 has shown that most heterocysts of 2-day-old cultures possess only very small amounts, if any, of c-phycocyanin, allo-phycocyanin, and c-phycoerythrin, the main pigments comprising photosystem II of photosynthesis. The quantities of these pigments, however, increase with age of cultures, and by the end of 5 days the majority of heterocysts contain comparatively large amounts. The culmination of this sequential development is observed in most heterocysts of 7- to 15-day-old cultures when the full complement of photosystem II pigments is present. The spectral characteristics at this stage are similar to those of vegetative cells and suggest a dedifferentiation of heterocysts.
摘要
对鱼腥藻属L-31异形胞体内色素进行的显微分光光度法检测表明，在2日龄培养物中，大多数异形胞仅含有极少量（若有的话）的c-藻蓝蛋白、别藻蓝蛋白和c-藻红蛋白，这些是构成光合作用光系统II的主要色素。然而，这些色素的量会随着培养物的老化而增加，到第5天结束时，大多数异形胞含有相对大量的这些色素。在7至15日龄培养物的大多数异形胞中观察到了这种连续发育的顶点，此时光系统II色素已完全具备。此阶段的光谱特征与营养细胞相似，表明异形胞发生了去分化。
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