TY - JOUR
AU - Miyake, Chikahiro
AB - What Quantity of Photosystem I Is Optimum for Safe Photosynthesis? a,2,3 a,b,4 Ginga Shimakawa, and Chikahiro Miyake Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University, Nada, Kobe 657-8501, Japan Core Research for Environmental Science and Technology, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0076, Japan ORCID IDs: 0000-0002-8557-2096 (G.S.); 0000-0002-2426-2377 (C.M.). PSI has the potential to generate reactive oxygen species and be oxidatively inactivated by the reactive oxygen species. The photo-oxidative damage of PSI (also called PSI photoinhibition) causes the inhibition of the plant growth and is a lethal event for plants. It has been reported that PSI photoinhibition does not occur as long as the reaction-center chlorophyll (P700) remains oxidized, even in excess light conditions. This process is termed P700 oxidation and is supported by various regulatory mechanisms and likely also by the stoichiometric quantities of photosynthetic apparatus. In this study, we assessed how decreased photochemically active PSI in Arabidopsis (Arabidopsis thaliana) affected a variety of photosynthetic parameters, including P700 oxidation. Inactivation of PSI was rapidly and selectively induced by repetitive short-pulse illumination. PSI photoinhibition correlated linearly with decreases in effective quantum yield of PSII and nonphotochemical quenching; however, the 
TI - What Quantity of Photosystem I Is Optimum for Safe Photosynthesis?
JF - Plant Physiology
DO - 10.1104/pp.18.01493
DA - 2019-04-01
UR - https://www.deepdyve.com/lp/american-society-of-plant-biologist/what-quantity-of-photosystem-i-is-optimum-for-safe-photosynthesis-FWix7eo2fE
SP - 1479
EP - 1485
VL - 179
IS - 4
DP - DeepDyve
ER -