Inactivity of 3-methyleneoxindole as mediator of auxin action on cell elongation.
نویسندگان
چکیده
The recently reported growth-promoting ability of 3-methyl-eneoxindole was examined in order to test the hypothesis that indole-3-acetic acid acts as a growth promoter only after oxidative conversion to 3-methyleneoxindole. Methyleneoxindole was synthesized from indole-3-acetic acid and N-bromosuccinimide, and its identity was confirmed by ultraviolet absorption, infrared absorption, mass spectrometry, and melting point. Methyleneoxindole was found to lack growth-promoting activity in coleoptile and pea (Pisum sativum) stem segments. Chlorogenic acid, an inhibitor of the oxidation of indole-3-acetic acid, was found to have no inhibitory effect on growth promotion by indole-3-acetic acid. It is concluded that 3-methyleneoxindole is inactive as a growth promoter and therefore does not mediate the action of auxin on cell elongation.
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ورودعنوان ژورنال:
- Plant physiology
دوره 52 2 شماره
صفحات -
تاریخ انتشار 1973