Fig 6. Phenotypes of anthocyanin deficient and anthocyanin enriched plants under cold stress.

Five-leaf old plants were treated at 4°C for 0 days and 3 days. (A) H₂O₂ accumulation in the leaves of the anthocyanin deficient plants, FMTT271 and NIL-GH, and the anthocyanin-enriched plants, NIL-PL and p35S-AH-FMTT271, as determined by DAB staining. (B) Cold-induced cell death in the mutant, FMTT271, NIL-GH and wild-type NIL-PL and p35S-AH-FMTT271 plants. Detached leaves were stained with trypan blue. Images are of representative plants. Scale bars, 0.2 cm.