Sensing and Responding to Excess Light

Plants and algae often absorb too much light-more than they can actually use in photosynthesis. To prevent photo-oxidative damage and to acclimate to changes in their environment, photosynthetic organisms have evolved direct and indirect mechanisms for sensing and responding to excess light. Photore...

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Bibliographic Details
Published in:Annual review of plant biology 2009-01, Vol.60 (1), p.239-260
Main Authors: Li, Zhirong, Wakao, Setsuko, Fischer, Beat B, Niyogi, Krishna K
Format: Article
Language:English
Subjects:
acclimation
Algae
biochemical pathways
chlorophyll
Flowers & plants
Gene expression
gene expression regulation
hydrogen peroxide
Hydrogen-Ion Concentration
Light
light intensity
literature reviews
Oxidation-Reduction
photooxidation
photoreceptors
Photoreceptors, Plant - physiology
Photosynthesis
phototropism
Plant biology
plant damage
Plant Physiological Phenomena
plant response
plants
Plants - metabolism
protein kinases
Proteins
reactive oxygen species
Reactive Oxygen Species - metabolism
redox reactions
resistance mechanisms
Signal transduction
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Summary:Plants and algae often absorb too much light-more than they can actually use in photosynthesis. To prevent photo-oxidative damage and to acclimate to changes in their environment, photosynthetic organisms have evolved direct and indirect mechanisms for sensing and responding to excess light. Photoreceptors such as phototropin, neochrome, and cryptochrome can sense excess light directly and relay signals for chloroplast movement and gene expression responses. Indirect sensing of excess light through biochemical and metabolic signals can be transduced into local responses within chloroplasts, into changes in nuclear gene expression via retrograde signaling pathways, or even into systemic responses, all of which are associated with photoacclimation.
ISSN:1543-5008
1545-2123
DOI:10.1146/annurev.arplant.58.032806.103844