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chlorophyll b
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Chlorophyll ''b'' is a form of chlorophyll. Chlorophyll ''b'' helps in photosynthesis by absorbing light energy. It is more soluble than chlorophyll ''a'' in polar solvents because of its carbonyl group. Its color is yellow, and it primarily absorbs blue light.〔(photosynthesis pigments )〕
In land plants, the light-harvesting antennae around photosystem II contain the majority of chlorophyll ''b''. Hence, in shade-adapted chloroplasts, which have an increased ratio of photosystem II to photosystem I, there is a lower ratio of chlorophyll ''a'' to chlorophyll ''b''.〔Kitajima and Hogan 2003〕 This is adaptive, as increasing chlorophyll ''b'' increases the range of wavelengths absorbed by the shade chloroplasts.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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