Resting cell formation in the marine diatom Thalassiosira pseudonana

Wang, Guangning, Huang, Lu, Zhuang, Shanshan, Han, Fang, Huang, Qianqian, Hao, Mengyuan, Lin, Guifang, Chen, Longnan, Shen, Biying, Li, Feng, Li, Xuesong, Chen, Changping, Gao, Yahui, Mock, Thomas ORCID: and Liang, Junrong (2024) Resting cell formation in the marine diatom Thalassiosira pseudonana. New Phytologist. ISSN 0028-646X

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Resting cells represent a survival strategy employed by diatoms to endure prolonged periods of unfavourable conditions. In the oceans, many diatoms sink at the end of their blooming season and therefore need to endure cold and dark conditions in the deeper layers of the water column. How they survive these conditions is largely unknown. We conducted an integrative analysis encompassing methods from histology, physiology, biochemistry, and genetics to reveal the biological mechanism of resting-cell formation in the model diatom Thalassiosira pseudonana. Resting-cell formation was triggered by a decrease in light and temperature with subsequent catabolism of storage compounds. Resting cells were characterised by an acidic and viscous cytoplasm and altered morphology of the chloroplast ultrastructure. The formation of resting cells in T. pseudonana is an energy demanding process required for a biophysical alteration of the cytosol and chloroplasts to endure the unfavourable conditions of the deeper ocean as photosynthetic organisms. However, most resting cells (> 90%) germinate upon return to favorable growth conditions.

Item Type: Article
Additional Information: Funding Information: This work was supported by the National Natural Science Foundation of China (Grant no. 42076115 and 41576138). Publisher Copyright: © 2024 The Authors. New Phytologist © 2024 New Phytologist Foundation.
Uncontrolled Keywords: diatom,intracellular acidification,metabolic reprogramming,resting cell formation,stress resistance,viscous cytosol and chloroplasts,physiology,plant science,sdg 14 - life below water ,/dk/atira/pure/subjectarea/asjc/1300/1314
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Depositing User: LivePure Connector
Date Deposited: 12 Apr 2024 09:30
Last Modified: 12 Apr 2024 09:30
DOI: 10.1111/nph.19646

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