Regulation of Cell Cycle Progression by Circadian Rhythms in Cyanidioschyzon merolae

Miyagishima, Shin-ya

doi:10.1007/978-981-10-6101-1_12

Cited by 1 publication

(1 citation statement)

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“…Normally, cell division is aroused by the mother cell size at a certain degree, as the cellular turgor pressure reaches the yield threshold for cell expansion. The model species Chlamydomonas reinhardtii is usually divided by a multiple fission mechanism that allows a single mother cell to produce 2 to 32 daughter cells [6]. A recent study revealed that the disruption of the cell cycle led to the remodeling of intermediate metabolisms, which consequently changed cell composition [7].…”

Section: Introductionmentioning

confidence: 99%

Coordinating Carbon Metabolism and Cell Cycle of Chlamydomonasreinhardtii with Light Strategies under Nitrogen Recovery

et al. 2021

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Nutrient supplementation is common in microalgae cultivation to enhance the accumulation of biomass and biofunctional products, while the recovery mechanism from nutrient starvation is less investigated. In this study, the influence of remodeled carbon metabolism on cell cycle progression was explored by using different light wavelengths under N-repletion and N-recovery. The results suggested that blue light enhanced cell enlargement and red light promoted cell division under N-repletion. On the contrary, blue light promoted cell division by stimulating cell cycle progression under N-recovery. This interesting phenomenon was ascribed to different carbon metabolisms under N-repletion and N-recovery. Blue light promoted the recovery of photosystem II and redirected carbon skeletons into proteins under N-recovery, which potentially accelerated cell recovery and cell cycle progression. Although red light also facilitated the recovery of photosystem II, it mitigated the degradation of polysaccharide and then arrested almost all the cells in the G1 phase. By converting light wavelengths at the 12 h of N-recovery with blue light, red and white lights were proved to increase biomass concentration better than continuous blue light. These results revealed different mechanisms of cell metabolism of Chlamydomonas reinhardtii during N-recovery and could be applied to enhance cell vitality of microalgae from nutrient starvation and boost biomass production.

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Section: Introductionmentioning

confidence: 99%