Hormone interactions in stomatal function

Abstract

Research in recent years on the biology of guard cells has shown that these specialized cells integrate both extra- and intra-cellular signals in the control of stomatal apertures. Among the phytohormones, abscisic acid (ABA) is one of the key players regulating stomatal function. In addition, auxin, cytokinin, ethylene, brassinosteroids, jasmonates, and salicylic acid also contribute to stomatal aperture regulation. The interaction of multiple hormones can serve to determine the size of stomatal apertures in a condition-specific manner. Here, we discuss the roles of different phytohormones and the effects of their interactions on guard cell physiology and function.

Functional Convergence of Oxylipin and Abscisic Acid Pathways Controls Stomatal Closure in Response to Drought

“…Drought stress is known to alter the balance of several plant hormones and modify their interactions, which ultimately can alter stomatal function (Acharya and Assmann, 2009). Among the phytohormones, ABA plays the most important role, limiting stomatal apertures under water stress conditions (Pospisilova, 2003;Kim et al, 2010).…”

Insect stings to change gear for healthy plant: Improving maize drought tolerance by whitefly infestation

“…15 JA and ABA are implicated in the regulation of plant responses to drought stress, including the activation of reactive oxygen species (ROS) and stomata closure. 20 ABA contents are not detectable in whiteflyinfested maize plants. 15 Taken together, these studies suggest that JA is required for both anthocyanin production and the elicitation of drought resistance after whitefly infestation.…”

Control of stomatal aperture

“…Several environmental factors affect stomata opening, including hormone, light quality and intensity, air humidity, atmospheric CO 2 concentration, biotic and abiotic stresses. 3,11,[14][15][16][17] Recent research progress has revealed that the guard cell response is co-ordinated by a complex of signal transduction networks including input from CO 2 , abscisic acid (ABA) and Ca 2+ . 1,11,18 The signal transduction network appears to be intermediated by kinase/ phosphatase regulation, secondary metabolites and the regulation of ion channels.…”