Study on energy transfer between carotenoid and chlorophyll a in cytochrome b6f complex from Bryopsis corticulans.
The excitation energy transfer between carotenoid and chlorophyll (Chl) in the cytochrome b ( 6 ) f complex from Bryopsis corticulans (B. corticulans), in which the carotenoid is 9-cis-alpha-carotene, was investigated by means of fluorescence excitation and sub-microsecond time-resolved absorption spectroscopies. The presence of efficient singlet excitation transfer from alpha-carotene to Chl a was found with an overall efficiency as high as approximately approximately 24%, meanwhile the Chl a-to-alpha-carotene triplet excitation transfer was also evidenced. Circular dichroism spectroscopy showed that alpha-carotene molecule existed in an asymmetric environment and Chl a molecule had a certain orientation in this complex.
Li
Bin-Xing
BX
Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Nan Xincun 20, Xiangshan, 100093, Beijing, P.R. China. lbli@ibcas.ac.cn
Zuo
Ping
P
Chen
Xiao-Bo
XB
Li
Liang-Bi
LB
Zhang
Jian-Ping
JP
Zhang
Jian-Ping
JP
Kuang
Ting-Yun
TY