Turkish Journal of Botany
The Effect of Glycinebetaine on the Heat Stability of Photosynthetic Reactions in Thylakoid Membranes
Heat inactivation of various photosynthetic electron transport reactions were investigated in the presence/absence of glycinebetaine (betaine) in unstacked thylakoid membranes from spinach. The activity of Photosystem II (PS II) is more sensitive to heat than that of Cytochrome bf (cyt.bf) and Photosytem I (PS I) complexes. The data obtained clearly demonstrated the protection of PS II and PS I electron transfer by betaine under high temperatures. The phenomena observed are probably related to the stabilization of the higher-order structures of PS II and PS I by betaine.
Electron transport, heat stress, glycinebetaine.
ALLAKHVERDIEVA, YAGUT M.; MAMEDOV, MAHIR D.; and GASANOV, RALPHREED A. (2001) "The Effect of Glycinebetaine on the Heat Stability of Photosynthetic Reactions in Thylakoid Membranes," Turkish Journal of Botany: Vol. 25: No. 1, Article 2. Available at: https://journals.tubitak.gov.tr/botany/vol25/iss1/2