Photochemical Dimerization of Ferulic Acid by Chloroplasts from Sorghum

Stafford, H.A. and Brown, M.A. (1977) Photochemical Dimerization of Ferulic Acid by Chloroplasts from Sorghum. Plant Physiology, 59 (1). pp. 94-96.

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Abstract

Sorghum (Sorghum bicolor) chloroplasts, lamellar fragments, and Triton X-100 solubilized preparations catalyze a blue and red light-sensitized oxidation of ferulic acid to its β-β-linked dimer and its hydrolysis product, the acid dimer. Exogenous superoxide dismutase had no effect, and catalase and 1 to 10 mm KCN inhibited this photooxidative dimerization only in detergent-treated chloroplasts. It is postulated that the final oxidant is H2O2, formed by light-induced photosystem I electron transport, followed by an unidentified peroxidatic activity. The reaction differs, however, from that catalyzed by horseradish peroxidase in the presence of H2O2

Item Type: Article
Author Affiliation: Department of Biology, Reed College, Portland, Oregon 97202
Subjects: Plant Physiology and Biochemistry > Plant Physiology
Plant Physiology and Biochemistry > Biochemistry
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 15 May 2012 10:17
Last Modified: 15 May 2012 10:17
Official URL: http://www.plantphysiol.org/content/59/1/94
URI: http://eprints.icrisat.ac.in/id/eprint/5349

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