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Tanned or Sunburned: How Excessive Light Triggers Plant Cell Death

Stefano d'Alessandro 1, 2, * Inès Beaugelin 2 Michel Havaux 2, *
* Corresponding author
1 LGBP - Luminy Génétique et Biophysique des Plantes
BIAM - Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB) : DRF/BIAM
2 SAVE - Signalisation de l'Adaptation des Végétaux à l'Environnement
BIAM - Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB) : DRF/BIAM
Abstract : Plants often encounter light intensities exceeding the capacity of photosynthesis (excessive light) mainly due to biotic and abiotic factors, which lower CO2 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 excessive absorption of light energy in the 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.
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Submitted on : Thursday, September 16, 2021 - 11:27:32 AM
Last modification on : Friday, September 17, 2021 - 3:34:03 AM

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Stefano d'Alessandro, Inès Beaugelin, Michel Havaux. Tanned or Sunburned: How Excessive Light Triggers Plant Cell Death. Molecular Plant, Cell Press/Oxford UP, 2020, 13 (11), pp.1545-1555. ⟨10.1016/j.molp.2020.09.023⟩. ⟨hal-03303923⟩

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