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Showing papers by "Rana Munns published in 1994"

Journal Article•DOI•
Handbook of plant and crop stress: Mohammad Pessarakli (Editor). Marcel Dekker, Inc., New York, 1993. Hardback, IBSN 0-8247-8987-3, 720 pp., US$150.00

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Rana Munns
01 Jul 1994-Field Crops Research

1 citations

Book Chapter•DOI•
Regulation of Shoot Growth in Dry Soils by Abscisic Acid and by Root Messages

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Rana Munns1, Robert E. Sharp2•
Commonwealth Scientific and Industrial Research Organisation1, University of Missouri2
01 Jan 1994
TL;DR: In this article, the role of ABA in root-to-shoot communication was investigated, and it was shown that ABA can inhibit shoot expansion in dry soil, as shown by the greater shoot growth when ABA synthesis is inhibited.
Abstract: Leaf expansion in drying soil is affected by growth substances produced by roots. The role of ABA in this root-to-shoot communication is unclear: the concentrations of free ABA in xylem sap seem too low to affect leaf expansion. Yet, ABA can inhibit shoot expansion in dry soil, as shown by the greater shoot growth when ABA synthesis is inhibited. A possible solution to this puzzle is that ABA is transported in xylem sap in a complexed form, or that another compound in xylem sap stimulates the synthesis or activity of ABA in leaves. Drying soil can stimulate the continued growth of a particular shoot tissue: the mesocotyl. The role of ABA and root messages in this unique response is being investigated.