Mutation of Arabidopsis CATALASE2 results in hyponastic leaves by changes of …

ABSTRACT Auxin and H2O2 play vital roles in plant development and environmental responses; however, it is unclear whether and how H2O2 modulates auxin levels. Here, we investigate this question using cat2-1 mutant, which exhibits reduced catalase activity and accumulates high levels ofH2O2 under photorespiratory conditions. At a light intensity of 150 mmol m-2 s-1, the mutant exhibited up-curl…