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Plant Physiology 91:163-169 (1989)
© 1989 American Society of Plant Biologists

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Molecular Biology and Gene Regulation

Light Quality and Irradiance Level Interaction in the Control of Expression of Light-Harvesting Complex of Photosystem II

Pigments, Pigment-Proteins, and mRNA Accumulation

Kenneth Eskins, Peter Westhoff1 and Phillip D. Beremand

Northern Regional Research Center, Agricultural Research Service, 1815 N. University St., Peoria, Illinois 61604, U.S. Department of Agriculture, 1815 N. University St., Peoria, Illinois 61604

Effects of red and blue light at irradiances from 1.6 to 28.3 micromolar per square meter per second on chloroplast pigments, light-harvesting pigment-proteins associated with photosystem II, and the corresponding mRNA were evaluated in maize (Zea mays L.) plants (OP Golden Bantum) grown for 14 days under 14 hours light/10 hours dark cycles. Accumulation of pigments, pigment-proteins, and mRNA was less in blue than in red light of equal irradiance. The difference between blue and red light, however, varied as a function of irradiance level, and the pattern of this variation suggests irradiance-controlled activation/deactivation (switching) of blue-light receptor. The maximum reduction in blue light of mRNA and proteins associated with light-harvesting complex occurs at lower irradiance levels than the maximum reduction of chlorophylls a and b.

1 Present address: University of Dusseldorf, Dusseldorf, FRG.




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T. Masuda, J. E.W. Polle, and A. Melis
Biosynthesis and Distribution of Chlorophyll among the Photosystems during Recovery of the Green Alga Dunaliella salina from Irradiance Stress
Plant Physiology, February 1, 2002; 128(2): 603 - 614.
[Abstract] [Full Text] [PDF]


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Copyright © 1989 by the American Society of Plant Biologists