ABSTRACT: In the past, a conventional wisdom has been that abscisic acid (ABA) is a xylem-transported hormone that is synthesized in the roots, while acting in the shoot to close stomata in response to a decrease in plant water status. Now, however, evidence from two studies, which we have conducted independently, challenges this root-sourced ABA paradigm. We show that foliage-derived ABA has a major influence over root development and that leaves are the predominant location for ABA biosynthesis during drought stress.
CITATION STYLE
McAdam, S. A. M., Manzi, M., Ross, J. J., Brodribb, T. J., & Gómez-Cadenas, A. (2016). Uprooting an abscisic acid paradigm: Shoots are the primary source. Plant Signaling and Behavior, 11(6). https://doi.org/10.1080/15592324.2016.1169359
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