Figure 3.

Stomatal Conductance Decreases and Hydrogen Peroxide and Ethylene Are Increased during the Course of Aerenchyma Formation in Arabidopsis.

(A) A gradual decrease in relative stomatal conductance (RSC) was detected during 8 d of waterlogging in Arabidopsis leaves (slope value and P value of simple linear regression is presented in the chart, n > 6 for each time point, error bars are ± sd).

(B) During the same period and treatments, there was a gradual increase in hydrogen peroxide (slope value and P value of simple linear regression is presented in the chart, n = 4 sets of at least four grouped samples for each time point, error bars are ± sd). FW, fresh weight.

(C) The ethylene precursor ACC increased in the Arabidopsis hypocotyls after 6 d of waterlogging (slope value and P value of simple linear regression is presented in the chart, n = 3 sets of at least four grouped samples for each time point, error bars are ± sd). Observe that decrease in stomatal conductance and increase in hydrogen peroxide level precede the increase of ACC by several days.