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Plant Physiology 74:320-323 (1984)
© 1984 American Society of Plant Biologists

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Occurrence of 4-Cl-Indoleacetic Acid in Broad Beans and Correlation of Its Levels with Seed Development 1

Tanja Pless, Michael Böttger, Peter Hedden and Jan Graebe

Institut für Allgemeine Botanik der Universität Hamburg, Ohnhorststra{beta}e 18, 2000 Hamburg 52, Pflanzenphysiologisches Institut der Universität Göttingen, Untere Karspüle, 3400 Göttingen Federal Republic of Germany

Seeds and leaves of Vicia faba L. contain considerable amounts of 4-Cl-indoleacetic acid as determined by gas-liquid chromatography and gas-liquid chromatography-mass spectrometry. The unchlorinated auxin could not be detected in either leaves or seeds at different stages of development. The developmental stages of fruits and seeds were characterized by the rate of straight growth of pods, the rate of fresh weight increase, and the development of the endosperm. The peak of 4-Cl-indoleacetic acid content per seed coincides with the maximum rate of water accumulation in the seeds.

1 Supported by the Deutsche Forschungsgemeinschaft.




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