Adaptation of the thylakoid membranes of pea pisum sativum chloroplasts to light intensities 1. study on the distribution of chlorophyll protein complexes

Leong, T.Y.; Anderson, J.M.

Photosynthesis Research 5(2): 105-116


ISSN/ISBN: 0166-8595
Accession: 004674157

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The effect of light intensity (16 h white light and 8th dark) during growth of pea plants at C on the chlorophyll m-2 s-1. This function can be described by 2 straight lines intersecting at a transition point of .apprx. 200 .mu.E m-2 s-1. Similar discontinuties in the responses were observed in the changes in the relative distribution of chlorophyll among the various chlorophyll-protein complexes. The chl a/chl b ratio of the various thylakoids is a good indicator of changes in the relative distribution of chlorophyll. As the chl a/chl b ratio decreased, the amount of chlorophyll associated with photosystem I complexes decreased, that with photosystem II core reaction center complex was halved, and that with the main chl a/b-proteins of the light-harvesting complex was markedly increased.