Chloroplasts of Arabidopsis are the source and a primary target of a plant-specific programmed cell death signaling pathway.
Kim C, Meskauskiene R, Zhang S, Lee KP, Lakshmanan Ashok M, Blajecka K, Herrfurth C, Feussner I, Apel K. Plant Cell. 2012 Jul; 24(7):3026-39. Epub 2012 Jul 12.