Plants often encounter light intensities exceeding the capacity of photosynthesis(excessive light)mainly due to biotic and abiotic factors,which lower C02 fixation and reduce light energy sinks.Under excessive light,t...Plants often encounter light intensities exceeding the capacity of photosynthesis(excessive light)mainly due to biotic and abiotic factors,which lower C02 fixation and reduce light energy sinks.Under excessive light,the photosynthetic electron transport chain generates damaging molecules,hence leading to photooxidative stress and eventually to cell death.In this review,we summarize the mechanisms linking the excessive absorption of light energy in chloroplasts to programmed cell death in plant leaves.We highlight the importance of reactive carbonyl species generated by lipid photooxidation,their detoxification,and the integrating role of the endoplasmic reticulum in the adoption of phototolerance or cell-death pathways.Finally,we invite the scientific community to standardize the conditions of excessive light treatments.展开更多
基金the French National Research Agency(ANR project SLOSAM,14-CE02-0010-02).
文摘Plants often encounter light intensities exceeding the capacity of photosynthesis(excessive light)mainly due to biotic and abiotic factors,which lower C02 fixation and reduce light energy sinks.Under excessive light,the photosynthetic electron transport chain generates damaging molecules,hence leading to photooxidative stress and eventually to cell death.In this review,we summarize the mechanisms linking the excessive absorption of light energy in chloroplasts to programmed cell death in plant leaves.We highlight the importance of reactive carbonyl species generated by lipid photooxidation,their detoxification,and the integrating role of the endoplasmic reticulum in the adoption of phototolerance or cell-death pathways.Finally,we invite the scientific community to standardize the conditions of excessive light treatments.
