Physiology and improving productivity under water scarcity

Has extrapolation from biochemistry to crop functioning worked to sustain plant production under water scarcity?
Author: William J. Davies1 and Wolfram Hartung2

Physiological traits used in the breeding of new cultivars for water-scarce environments.
Author: Richard A. Richards

Root Growth Maintenance during Water Deficits: Physiology to Functional Genomics
Author: Robert E. Sharp1, Valeriy Poroyko2, Lindsey G. Hejlek1, William G. Spollen3, Gordon K. Springer3, Hans J Bohnertand Henry Nguyen1