Journal of Experimental Botany, Vol. 53, No. 366, pp. 33-37,
January 1, 2002
© 2002 Oxford University Press
Short Papers |
ABA, ethylene and the control of shoot and root growth under water stress
Department of Agronomy, Plant Sciences Unit, 187 Agriculture Building, University of Missouri, Columbia, MO 65211, USA
Abstract
The question of whether abscisic acid (ABA) acts as an inhibitor or promoter of shoot growth in plants growing in drying soil is examined, drawing on current understanding of the role of ABA in root growth maintenance. Particular consideration is given to studies of endogenous ABA deficiency, which have shown that an important role of ABA is to limit ethylene production, and that this interaction is involved in the effects of ABA status on shoot and root growth.
Key words: Abscisic acid, ethylene, root growth, shoot growth, water stress.
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