Abscisic acid (ABA) is a stress signal, which moves in the xylem from the roots to the aerial parts of the plant, where it regulates stomatal movement and the activity of shoot meristems. Root growth-promoting microorganisms in the rhizosphere, lateral ABA flows in the root cortex across apoplastic barriers, ABA redistribution in the stem, leaf apoplastic pH values, and the action of β-glucosidases, both in the apoplast and the cytosol of the mesophyll, play an important role in the regulation of signal intensity. The significance of abscisic acid glucose ester as a long-distance stress signal is discussed. © The Author [2007]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved.
CITATION STYLE
Jiang, F., & Hartung, W. (2008). Long-distance signalling of abscisic acid (ABA): The factors regulating the intensity of the ABA signal. In Journal of Experimental Botany (Vol. 59, pp. 37–43). https://doi.org/10.1093/jxb/erm127
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