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Concentrations of Abscisic Acid and Indole-3-Acetic Acid in Soybean Seeds during Development

Mich B. Hein, Mark L. Brenner and William A. Brun
Plant Physiology
Vol. 76, No. 4 (Dec., 1984), pp. 951-954
Stable URL: http://www.jstor.org/stable/4269035
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Concentrations of Abscisic Acid and Indole-3-Acetic Acid in Soybean Seeds during Development
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Abstract

Concentrations of abscisic acid (ABA) and indole-3-acetic acid (IAA) in seed parts were determined during reproductive development of soybean plants (Glycine max [L.] Merr. cv 'Chippewa 64'). The concentration of ABA and IAA changed independently in individual seed parts with time. Measurement of the level of ABA and IAA in whole seeds masked the changes which occurred in individual seed tissues. The concentration of ABA was generally highest and that of IAA was generally lowest in the embryonic axis of soybean seeds. In the testa, the IAA concentration was generally highest while the ABA concentration was generally the lowest compared to other parts of the seed.

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