The Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Kraków, Poland.
Int J Mol Sci. 2021 Apr 13;22(8):4021. doi: 10.3390/ijms22084021.
is a cyanobacteria species with a lack of thylakoids, while photosynthetic antennas, i.e., phycobilisomes (PBSs), photosystem II (PSII), and I (PSI), are located in the cytoplasmic membrane. We verified the hypothesis that blue-red (BR) light supplemented with a far-red (FR), ultraviolet A (UVA), and green (G) light can affect the photosynthetic electron transport chain in PSII and explain the differences in the growth of the culture. The cyanobacteria were cultured under different light conditions. The largest increase in biomass was observed only under BR + FR and BR + G light. Moreover, the shape of the cells was modified by the spectrum with the addition of G light. Furthermore, it was found that both the spectral composition of light and age of the cyanobacterial culture affect the different content of phycobiliproteins in the photosynthetic antennas (PBS). Most likely, in cells grown under light conditions with the addition of FR and G light, the average antenna size increased due to the inactivation of some reaction centers in PSII. Moreover, the role of PSI and gloeorhodopsin as supplementary sources of metabolic energy in the growth is discussed.
是一种无类囊体的蓝藻，而光合天线，即藻胆体（PBS）、光系统 II（PSII）和 I（PSI），位于细胞质膜中。我们验证了这样一个假设，即蓝-红（BR）光补充远红（FR）、紫外线 A（UVA）和绿（G）光可以影响 PSII 中的光合作用电子传递链，并解释了 培养物生长差异的原因。蓝藻在不同的光照条件下培养。只有在 BR + FR 和 BR + G 光下，生物量才会最大程度增加。此外，通过添加 G 光，光谱会改变 细胞的形状。此外，还发现光的光谱组成和蓝藻培养物的年龄都会影响光合天线（PBS）中藻胆蛋白的不同含量。很可能是由于 PSII 中的一些反应中心失活，在添加 FR 和 G 光的条件下生长的细胞中，天线的平均大小增加了。此外，还讨论了 PSI 和绿视蛋白作为代谢能量的补充来源在 生长中的作用。
