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photoinhibition

   Also found in: Wikipedia 0.01 sec.
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.


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The photoinhibition of germination by white or red light insures that these spores germinate underground in nature providing improved chances of spores obtaining adequate soil moisture and mycorrhizal colonization of young gametophytes that are essential for continued development.
If, as studies indicate, bacterioplankton and phytoplankton have differential susceptibilities to photoinhibition, the degree of nutrient competition will vary with light intensity and spectral composition.
 
 
 
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