Figure 8.

Overexpression of CAT2 Represses the Early Senescence Phenotype of WRKY75ox Plants.

(A) The senescence phenotypes of 40-d-old Col-0, WRKY75ox, WRKY75ox/CAT2ox, and CAT2ox plants.

(B) and (C) qRT-PCR analysis of the expression of WRKY75 (B) and CAT2 (C) in the leaves shown in (A). The third and fourth rosette leaves were used. Student’s t test, *P < 0.05 and ***P < 0.001. Data are represented as means ± sd, n = 3. The experiments were performed three times with similar results.

(D) and (E) Measurement of chlorophyll contents (D) and H₂O₂ contents (E) in the leaves shown in (A). The third and fourth rosette leaves were used. Student’s t test, ***P < 0.001. Data are represented as means ± sd, n = 3. The experiments were performed three times with similar results.