Photo-regulation of the ratio of ester to free indole-3-acetic acid

Robert S. Bandurski, Aga Schulze, Jerry D. Cohen

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Abstract

A light exposure, sufficient to cause a 30% reduction in growth rate of seedlings of Zea mays, causes a decrease of 40% in the concentration of free indole-3-acetic acid in the seedling and an increase in the content of esterified indole-3-acetic acid. We conclude that one mechanism for regulation of plant growth is alteration of the ratio of free to conjugated hormone by environmental stimuli.

Original languageEnglish (US)
Pages (from-to)1219-1223
Number of pages5
JournalBiochemical and Biophysical Research Communications
Volume79
Issue number4
DOIs
StatePublished - Dec 21 1977

Bibliographical note

Funding Information:
The authors acknowledge the advice and council of Dr. .I. Shen-Miller, and A. W. Galston for helpful discussions of the complexity of photoresponses statistical calculations. This work was supported by the division of Metabolic dation, PCM 76-12356 and is journal article 8218 from the Michigan Agricultural and thank Drs. W. R. Brig@ of seedlings and Dr. S. Ries for Biology, National Science Foun-Experiment Station.

Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.

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