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. 1983 Jun;72(2):526–529. doi: 10.1104/pp.72.2.526

Effect of Deseeding on the Indole-3-acetic Acid Content of Shoots and Roots of Zea mays Seedlings 1

Yoshie S Momonoki 1, Aga Schulze 1, Robert S Bandurski 1,2
PMCID: PMC1066267  PMID: 16663036

Abstract

We wished to determine the effect of endosperm removal on the amounts of free and esterified indole-3-acetic acid (IAA) in young Zea mays seedlings. The increases of IAA derived from endosperm and from biosynthesis, but without correction for catabolic losses, were 0.9 picomole of free IAA per shoot per hour, and 1.1 picomoles per shoot per hour of ester IAA. After deseeding, free IAA in the shoot declines by 40% following kernel removal and total (free + ester) IAA declines at a rate of about 1 picomole per shoot per hour. A slight, but insignificant increase of ester IAA occurs following endosperm removal. In the primary roots, the decreases of free IAA and total (free + ester) IAA are accelerated by seed removal. Thus, the endosperm appears to be a major source of IAA for the shoot and root.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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