PMID: 16662614Oct 1, 1982

Water Relations of Cotton Plants under Nitrogen Deficiency: V. Environmental Control of Abscisic Acid Accumulation and Stomatal Sensitivity to Abscisic Acid

Plant Physiology
J W RadinG Guinn

Abstract

Suboptimal N nutrition increased the water potential for stomatal closure in water stressed cotton (Gossypium hirsutum L.) leaves. This increased sensitivity to water stress had two components, increased accumulation of abscisic acid (ABA) and increased apparent stomatal sensitivity to ABA. Low N increased the threshold water potentials for stomatal closure and ABA accumulation by about 4 bars and 2 bars, respectively. Low N also greatly increased stomatal response to low concentrations of exogenous ABA applied to excised leaves through the transpiration stream. In low N leaves, kinetin decreased stomatal response to ABA to the level observed with high N leaves. Kinetin by itself had little effect on stomata, nor did it alter stomatal response to ABA in high N leaves. The results suggest a cytokinin-ABA balance which is altered by suboptimal N nutrition to favor stomatal closure during stress.Ambient temperature and N nutrition interacted to alter stomatal response to water stress. Stress-induced ABA accumulation and apparent stomatal sensitivity to ABA were independently affected. The effects of each treatment, and their interaction, could be explained as the net result of changes in both accumulation and apparent sensitivity....Continue Reading

References

Mar 22, 2000·Plant Science : an International Journal of Experimental Plant Biology·A R LodeiroG Favelukes
Dec 6, 2011·Omics : a Journal of Integrative Biology·Francisco Pérez-AlfoceaI C Dodd
May 16, 2009·Journal of Experimental Botany·S. Wilkinson, W Hartung
Jan 5, 2011·Journal of Experimental Botany·Takatoshi KibaHitoshi Sakakibara
May 30, 2012·Journal of Experimental Botany·S. WilkinsonW. J. Davies
Jan 27, 2016·Journal of Proteomics·Christiana StaudingerStefanie Wienkoop
Mar 26, 2002·Journal of Experimental Botany·F Gastal, G Lemaire
Feb 14, 2002·Plant, Cell & Environment·S. Wilkinson, W. J. Davies
Apr 8, 2020·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Roberta BulgariAntonio Ferrante

Citations

Jul 1, 1964·Proceedings of the National Academy of Sciences of the United States of America·P F ScholanderE D Bradstreet

Related Concepts

Gossypium
Stomatal Closure
Malnutrition
Cytokinins
Surgical Stoma
N6-furfuryladenine
Transpiration
Abscisic Acid
Gossypium hirsutum
Water Stress

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