Figure 1

Morphologic characterization, chlorophyll (Chl) and malondialdehyde (MDA) contents in plants. (A) phenotype of developmental senescence (DS). (B) phenotype of premature senescence (PS). (C) Chl and MDA contents of leaves in DS. (D) Chl and MDA contents of leaves in PS. Results of Chl and MDA are shown as means ± SE. “ns” means no significant difference. *, ** and *** represent significant difference at p < 0.05, 0.01 and 0.001 respectively. B and D were adapted from our previous work49.