Activities of antioxidant enzymes. Changes in enzyme activities of ascorbate peroxidase (APX; A), monodehydroascorbate reductase (MDHAR; B), dehydroascorbate reductase (DHAR; C), glutathione reductase (GR; D), catalase (CAT; E), superoxide dismutase (SOD; F), and peroxidase (POX; G) based on protein content and fresh weight during ripening in ‘Santorini’ and ‘Ailsa Craig’ fruits grown in a hydroponic system in the greenhouse. Ripening stages are expressed as Days After Pollination (DAP). For ‘Santorini’: 27DAP, immature green (IG); 38DAP, mature green (MG); 40DAP, B-1; 41DAP, breaker (B); 42DAP, B + 1; 46DAP, pink; 50DAP, red. For ‘Ailsa Craig’: 27DAP, IG; 39DAP, MG; 41DAP, B-1; 42DAP, B; 43DAP, B + 1; 47DAP, pink; 52DAP, red. Results are represented as the mean of three replications ± SD. Each replication consisted of pooled samples as explained in materials and methods, and was the same used for AsA determination and gene expression analysis.
Mellidou et al. BMC Plant Biology 2012 12:239 doi:10.1186/1471-2229-12-239