photoinhibition


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photoinhibition

[¦fōd·ō‚in·ə′bish·ən]
(botany)
Damage to the light-harvesting reactions of the photosynthetic apparatus caused by excess light energy trapped by the chloroplast.
References in periodicals archive ?
Interaction of salt stress and photoinhibition on photosynthesis in barley and sorghum.
It has been suggested that anthocyanin screens senescing foliage from high levels of incident light (Hoch et al., 2001), thereby reducing the potential for photoinhibition. This creates an environment for the efficient resorption of foliar nutrients during a period of restricted photoprotective capacity.
The sudden increase in solar radiation may also cause photoinhibition of shade-grown seedlings.
Reduction in maximal quantum of yield of PSII (Fv/Fm) is an indicator of the degree of photoinhibition (Kreslavski et al.
Therefore, chlorophyll fluorescence, especially for the PSII system, can be a very powerful tool to study photosynthetic performance, the degree of water stress or photoinhibition, and photoprotective mechanisms [17-19].
Kunert (1995).Overexpression of glutathione reductase but not glutathione synthetase leads to increases in antioxidant capacity and resistance to photoinhibition in poplar trees.
Estimation of the effect of photoinhibition on the carbon gain in leaves of a willow canopy.
UVR-induced photoinhibition is known to change seasonally depending on the composition of the natural assemblages, as seen in Patagonian marine coastal waters where the bloom (diatom-dominated) was relatively more sensitive that the pre- and post bloom communities (flagellate-dominated community) (Villafane et al., 2004a).