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Acclimation of Barley to Changes in Light Intensity: Chlorophyll Organization by Winston Raul De la Torre; Kent Oliver Burkey is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Barley seedlings (Hordeum vulgare L. cv. Boone) were grown at 20°C with a 16h/8h light/dark cycle of either high (H) intensity (550 μmole m(-2) s(-1)) or low (L) intensity (55 μmole m(-2) s(-1)) white light. Plants were transferred from high to low (H → L) or low to high (L → H) light intensity at various times from 4 to 8 d after leaf emergence from the soil. Primary leaves were harvested at the beginning of the photoperiod and a 3 cm apical segment removed for analysis. H control plants had greater chlorophyll (Chl) per leaf area and higher Chl a/b ratios than L controls. Analysis of Chl-protein complexes revealed that H and L plants had the same percentage of total Chl (62-65%) associated with Photosystem II (PS II), but that the organization of Chl within PS II was different. H plants contained lower levels of light-harvesting complex (LHC-II) and higher levels of the PS II complex CPa compared with L plants. Leaf Chl content and Chl organization within PS II were sensitive to changes in light intensity. In H → L plants, leaf Chl content decreased, Chl a/b ratio decreased, and a redistribution of Chl from CPa to LHC-II occurred during acclimation to low light. Acclimation of L

Who reads Acclimation of Barley to Changes in Light Intensity: Chlorophyll Organization?

Author

Winston Raul De la Torre; Kent Oliver Burkey

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0166-8595)

Published

1990

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)