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Inhibition of ion accumulation in maize roots by abscisic acid

✍ Scribed by Dale L. Shaner; Stuart M. Mertz; Charles J. Arntzen

Publisher: Springer-Verlag
Year: 1975
Tongue: English
Weight: 775 KB
Volume: 122
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00385407

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✦ Synopsis

An inhibition of root growth, a decrease in the amount of potassium (as (86)Rb) and phosphate ((32)P) accumulation by the root, and a partial depolarization of transmembrane electropotential were observed to develop with a similar time course and to a similar extent when intact maize (Zea mays L.) roots were treated with 10(-5) M abscisic acid (ABA). Potassium uptake was inhibited by ABA when excised, low-salt roots were bathed in KCl, KH2PO4, or K2SO4. ABA did not affect the ATP content of the tissues, the activity of isolated mitochondria, nor the activity of microsomal K(+)-stimulated ATPases.

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