期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 59, 期 1, 页码 37-43出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erm127
关键词
abscisic acid glucose ester; apoplast; beta-glucosidases; pH; rhizosphere; xylem
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 beta-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.
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