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Regulation of Photosynthesis during Abiotic Stress-Induced Photoinhibition

Molecular Plant 2015年第9期8卷 1304-1320页

作者： mayank anand gururani Jelli Venkatesh Lam-Son Phan Tran School of Biotechnology Yeungnam University Gyeongsan Gyeongbook 772-749 Korea Department of Bioresource and Food Science Konkuk University Seou1143-701 Korea Signaling Pathway Research Unit RIKEN Center for Sustainable Resource Science 1-7-22 Suehiro-cho Tsurumi Yokohama Kanagawa 230-0045 Japan

Plants as sessile organisms are continuously exposed to abiotic stress conditions that impose numerous detrimental effects and cause tremendous loss of yield. Abiotic stresses, including high sunlight, confer serious damage on the photosynthetic machinery of plants. Photosystem II （PSII） is one of the most susceptible components of the photosynthetic machinery that bears the brunt of abiotic stress. In addition to the generation of reactive oxygen species （ROS） by abiotic stress, ROS can also result from the absorption of excessive sunlight by the light-harvesting complex. ROS can damage the photosynthetic apparatus, particularly PSII, resulting in photoinhibition due to an imbalance in the photosynthetic redox signaling pathways and the inhibition of PSII repair. Designing plants with improved abiotic stress tolerance will require a comprehensive understanding of ROS signaling and the regulatory functions of various components, including protein kinases, transcription factors, and phytohormones, in the responses of photosynthetic machinery to abiotic stress. Bioenergetics approaches, such as chlorophyll a transient kinetics analysis, have facilitated our understanding of plant vitality and the assessment of PSII efficiency under adverse environmental conditions. This review discusses the current understanding and indicates potential areas of further studies on the regulation of the photosynthetic machinery under abiotic stress.

关键词： abiotic stress chlorophyll a fluorescence hormones light-harvesting complex photosynthesis

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