Chemical regulation of gas exchange and growth of plants in drying soil in the field

• Published in: Journal of experimental botany Vol. 47; no. 10; pp. 1475 - 1490
• Main Authors: Dodd, I.C., Stikic, R., Davies, W.J.
• Format: Journal Article
• Language: English
• Published: Oxford Oxford University Press 01-10-1996; OXFORD UNIVERSITY PRESS
• Subjects: ABA; Arid soils; Biological and medical sciences; Corn; drought; Drying; Fundamental and applied biological sciences. Psychology; hormonal sensitivity; leaf growth; Leaves; Perspectives in Ecophysiology; Physical agents; Plant growth regulators; Plant physiology and development; Plant roots; Plants; Sap; Stomata; stomatal conductance; Vegetative apparatus, growth and morphogenesis. Senescence; Xylem; xylem sap; Vegetals; Growth; Water deficit; Stomatal conductance; Plant leaf; Diurnal variation; Water stress; Regulation(control); Angiospermae; Abscisic acid; Plant growth substance; Spermatophyta; Gas exchange
• ISSN: 0022-0957; 1460-2431
• DOI: 10.1093/jxb/47.10.1475

There is now substantial evidence that chemical regulation of shoot physiology occurs in droughted plants in the field. The evidence that ABA may play a role in such regulation is considered, and topics of relevance to the worker interested in determining the ABA relations of plants in the field; such as the methods used for ABA quantification, the relevance of quantifying ABA in various plant tissues, methods of xylem sap collection and timing of sap collection are reviewed. A possible role of tissue sensitivity to ABA in controlling the diurnal changes in stomatal conductance and leaf growth rate seen in the field is also considered.