Cryptophyte algae belong to a special group of oxygenic photosynthetic organisms containing pigment combination unique for plastids – phycobiliproteins and chlorophyll a/c-containing antenna. Despite the progress in investigation of morphological and ecological features, as well as genome-based systematics of cryptophytes, their photosynthetic apparatus remains poorly understood. The ratio of the photosystems (PS)s I and II is unknown and information on participation of the two antennal complexes in functions of the two photosystems is inconsistent. In the present work we demonstrated for the first time that the cryptophyte alga Rhodomonas salina had the PSI to PSII ratio in thylakoid membranes equal to 1 : 4, whereas this ratio in cyanobacteria and higher plants was known to be 3 : 1 and 1 : 1, respectively. Furthermore, it was established that contrary to the case of cyanobacteria the phycobiliprotein antenna represented by phycoerythrin-545 (PE-545) in R. salina was associated only with the PSII, which indicated specific spatial organization of these protein pigments within the thylakoids that did not facilitate interaction with the PSI.

中文翻译：

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藻红蛋白与隐藻藻红单胞菌中光系统 II 的关联

隐藻藻属于一组特殊的含氧光合生物，含有质体特有的色素组合——藻胆蛋白和含有叶绿素 a/c 的触角。尽管在形态学和生态学特征的研究以及基于基因组的隐生植物系统学方面取得了进展，但对它们的光合作用装置仍然知之甚少。光系统 (PS) I 和 II 的比率未知，并且关于两个触角复合物参与两个光系统功能的信息不一致。在目前的工作中，我们首次证明隐生藻类盐生红藻在类囊体膜中的 PSI 与 PSII 之比等于 1:4，而在蓝藻和高等植物中的这一比例已知为 3:1 和 1:1 ， 分别。此外，