An M-phase Arabidopsis root tip nucleus with DNA colored red and antibodies to the plant - H2AX protein shown in green discrete chromosomal foci, marking the sites of ionizing radiation-induced DNA double-strand breaks. (Dr. Anne Britt)

GFP fluorescence and aldehyde levels in the roots of a transgenic Arabidopsis seedling constitutively overexpressing OsHPL1-GFP. (Dr. Katie Dehesh)

Above image provided By Dr. Michael Reid

Color change of orange fruit is due to disappearance of green pigments, chlorophylls, and accumulation of orange pigments, carotenoids, which are associated with the conversion of chloroplasts to chromoplasts. (Dr. Kentaro Inoue)

Above image provided By Dr. John Yoder

Above image provided By Dr. Richard Michelmore

siRNAs and DNA methylation protect the genome from transposons, and may regulate chromosome function. (Dr. Simon Chan)