Long-distant transport as a photosynthesis regulation mechanism in characean algae

Alova, A.; Bulychev, A.; Cherkashin, A.; Krupenina, N.; Shapiguzov, S.; Eremin, A.; von Rueling, F.; Rubin, A.

Авторы: Alova A., Bulychev A., Cherkashin A., Krupenina N., Shapiguzov S., Eremin A., von Rueling F., Rubin A.
Журнал: Biophysical Reviews
Том: 15
Год издания: 2023
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 1641
Последняя страница: 1642
Номер статьи: S6.398
DOI: 10.1007/s12551-023-01150-w
Аннотация: Two approaches were applied to study long-distance intra- and intercellular interactions in photosynthesis of internodal cells of Chara australis and Nitelloposis obtusa algae. In the first one, chlorophyll fluorescence (Chl FL) transients were traced in a small region of interest (AOI) under local illumination of a remote cell area. In the other approach, the induction changes of Chl FL in AOI were compared under narrow-field and wide-field illumination. The divergent parts of FL induction curves in these light treatments reflect the exchange of metabolites between AOI and surrounding areas. Permeation of photometabolites through plasmodesmata of Chara cells was quantitatively assessed. It was shown that the mobile cytoplasmicpackage produced after exposure of cells to intense LL at low and high background irradiance contains two types of metabolitesthat cause opposite changes in Chl FL. The reducing metabolites were found to freely permeate through intercellular barriers, while the products acting as FL quenchers were unable to overcome them. Apparently,plasmodesmata act as a selective filter that restricts the passage of potentially destructive agents generated at high light.
Добавил в систему: Булычев Александр Александрович

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