Compound stress response in stomatal closure: a mathematical model of ABA and ethylene interaction in guard cells.

ABSTRACT:

Background

Stomata are tiny pores in plant leaves that regulate gas and water exchange between the plant and its environment. Abscisic acid and ethylene are two well-known elicitors of stomatal closure when acting independently. However, when stomata are presented with a combination of both signals, they fail to close.

Results

Toshed light on this unexplained behaviour, we have collected time course measurements of stomatal aperture and hydrogen peroxide production in Arabidopsis thaliana guard cells treated with abscisic acid, ethylene, and a combination of both. Our experiments show that stomatal closure is linked to sustained high levels of hydrogen peroxide in guard cells. When treated with a combined dose of abscisic acid and ethylene, guard cells exhibit increased anti

SUBMITTER: Beguerisse-Dıaz M 

PROVIDER: S-EPMC3564773 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature