Affiliation:
1. Department of Botany, Panjab University, Chandigarh 160014, India
Abstract
Ca2+ and H2O2 interact with each other to regulate plant systemic responses. However, their precise mechanism is not fully understood. A recent study revealed that the Ca2+ regulates the glycolate oxidase-catalase (GC) switch-mediated photorespiratory H2O2 during wounding. Glutamate-receptor-like (GLR) Ca2+ channels (GLR 3.3 and GLR3.6) are responsible for Ca2+ influx during injury for regulation of the GC switch. Mechanical injury quickly shifts the GC switch to a highly interactive state in the systemic leaves that ultimately results in the reduced peroxisomal H2O2. However, the mechanism of H2O2 reduction in peroxisome remains elusive.
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