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A new subarctic strain of Tetradesmus obliquus. Part II: comparative studies of CO2-stress toleranceстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 сентября 2019 г.
- Авторы: Scherbakov P., Ismagulova T., Chernov T., Gorelova O., Selyakh I., Semenova L., Baulina O., Chivkunova O., Solovchenko A., Lobakova E.
- Журнал: Journal of Applied Phycology
- Том: 30
- Год издания: 2018
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 2751
- Последняя страница: 2761
- DOI: 10.1007/s10811-017-1334-9
- Аннотация: A huge interest in CO2-tolerant microalgae is fueled by development of CO2- biomitigation methods based on intensive cultivation of microalgae. Still, the mechanisms of CO2-tolerance are scarcely investigated. Previously, we described a symbiotic Desmodesmus sp. IPPAS S-2014 from a White Sea hydroid tolerant to extremely high (20−100%) CO2 levels. In the present work, we compared its ultrastructural and physiological responses to a novel free-living White Sea strain of Tetradesmus obliquus IPPAS S-2023 characterized in the companion paper. The strain S-2023 is closely related to Desmodesmus sp. IPPAS S-2014 but lacks its tolerance to extremely high CO2 (it is unable to survive at 100% CO2 and exhibits a reduced-growth phenotype when sparged with 20% CO2: air mixture). We compared the responses of the cell organization and photosynthetic activity to 20% CO2 in the tolerant and the intolerant White Sea chlorophytes using chlorophyll fluorescence measurements and ultrastructural analysis (transmission electron microscopy). The features peculiar to the CO2-intolerant chlorophyte include (i) inability to maintain pH homeostasis of the cultural medium; (ii) a steady decline in the photosynthetic activity of the cells; (iii) a reduction of the photosynthetic membranes; and (iv) delayed accumulation of starch (starch grains) and its subsequent conversion to reserve lipids (oil bodies). N starvation enhances the effects of high-CO2 stress in CO2-intolerant microalga. The results of this work are discussed in the context of selection of tolerant algal strains for CO2 biomitigation applications.
- Добавил в систему: Соловченко Алексей Евгеньевич