Darrell and Chris have recently published a study of the small RNA complements in grapevine embryogenic cell cultures compared to young leaf tissue and their targets.
Lizamore, D. & Winefield, C. A comparative survey of small RNA and their targets in grapevine embryogenic callus cultures and young leaves. Acta Hortic. 1188, 329–336 (2017).
This preliminary study highlights the differences in molecular regulation by small RNAs in embryogenic callus compared to leaf tissue and provides baseline data for work we are currently preparing for publication describing the transposon compliments and epigenetic status of these in the callus system we are currently using as a launch pad for new transposition events in grapevine.