Abstract

It has been found that cell volumes of the Synechococcus sp. WH5701 strain of cyanobacteria, as well as the intracellular contents of chlorophyll a and C-phycocyanin, did not depend of the spectral qualities of light. Chlorophyll a specific light absorption coefficients by pigments at wavelengths of 438 and 678 nm in cells adapted to blue light were higher than in cells adapted to white light by 20 and 50%, respectively. It was found that the quantum yield and the cell growth rate of Synechococcus sp. WH5701 depended on the spectral composition of the light. The value of the maximum quantum yield was at a minimum under blue light adaptation and at a maximum under adaptation to red light. An inverse relationship was revealed between the chlorophyll a specific light absorption coefficients and the quantum yield of growth, because in cyanobacteria, unlike eukaryotic microalgae, photosynthesis and growth depend on quanta absorbed only by phycobilin pigments, but not by all pigments. This peculiarity depends on the specific structure and function of the photosynthetic apparatus of cyanobacteria.

中文翻译：

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不同光谱质量的光对C-吡花青蓝藻Synechococcus sp。光合特性的影响。WH5701

摘要

已经发现Synchococcus sp。的细胞体积。WH5701蓝细菌菌株以及叶绿素a和C-藻蓝蛋白的细胞内含量与光的光谱质量无关。在适应蓝光的细胞中，色素在438和678 nm波长下对叶绿素a的比吸收系数分别比适应白光的细胞高20％和50％。结果发现，量子产率和细胞生长速度聚藻sp。WH5701取决于光的光谱成分。在蓝光适应下，最大量子产率的值最小，而在红光适应下，最大量子产率的值最大。叶绿素a的特定光吸收系数与生长的量子产率之间存在反比关系，这是因为在蓝细菌中，与真核微藻不同，光合作用和生长仅取决于藻蓝素颜料而不是所有颜料吸收的量子。这种特殊性取决于蓝细菌光合作用设备的具体结构和功能。