Figure 2
From: Genomic, chromosomal and allelic assessment of the amazing diversity of maize
The effect of the C2-Idf allele on anthocyanin pigmentation. (a) C2 confers intense pigmentation in a plant with strong activators of transcription of the B, Pl anthocyanin pathway, but (b) there is a significant reduction of the pigment in a C2/C2-Idf heterozygote. (c) Infection with maize dwarf mosaic virus, a potyvirus that encodes the P1/Hc-Pro suppressor of gene silencing, restores pigmentation in a pattern similar to that of viral spread. Maize necrotic streak virus infection also restores pigmentation (not shown), presumably through the action of P19, which binds small interfering RNAs (siRNAs). Photograph courtesy of Chris Della Vedova.