摘要
IT is well known that state transitions can keep even distribution of excitation energy betweenthe two photosystems (PS Ⅱ and PS Ⅰ), favoring efficient operation of the photosyntheticapparatus. However, state transitions are usually thought to be associated with low light con-ditions. Its physiological significance under high light conditions is still a controversial is-suc. Many people think that state transitions occur and take significant effect only under
