Response of photosynthesis and chlorophyll fluorescence quenching to leaf dichotocarpism in Ligustrum vicaryi, an ornamental herb

Autor:	X. F. Yi, P. Prasad, Y. Q. Yang
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Photosystem II Physiology Plant physiology Plant Science Biology Photosynthesis chemistry.chemical_compound chemistry Photosynthetically active radiation Photoprotection Chlorophyll Botany Chlorophyll fluorescence Carotenoid
Zdroj:	Photosynthetica. 47:137-140
ISSN:	1573-9058 0300-3604
Popis:	Net photosynthetic rate of yellow upper leaves (UL) of Ligustrum vicaryi was slightly, but not significantly higher than that of green lower leaves (LL). Diurnally, maximum photochemical efficiency of photosystem 2, PS2 (Fv/Fm) of LL did not significantly decline but the UL showed fairly great daily variations. Yield of PS2 of UL showed an enantiomorphous variation to the photosynthetically active radiation and was significantly lower than in the LL. Unlike Fv/Fm, the efficiency of energy conversion in PS2 and both non-photosynthetic and photosynthetic quenching did not differ in UL and LL. Significant differences between UL and LL were found in contents of chlorophyll (Chl) a, b, and carotenoids (Car) and ratios of Chl a/b, Chl b/Chl (a+b), and Car/Chl (a+b). Leaf colour dichotocarpism in L. vicaryi was mainly caused by different photon utilization; sunflecks affected the LL.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::36392a20d30e48fab82782cdd1af783f https://doi.org/10.1007/s11099-009-0022-7 Zobrazit plný text záznamu Full text from SpringerLink