Expert View. Merging genotypes: Scion/rootstock interactions (J Exp Bot)

Grafting is an ancient technology and still extremely important in horticulture and food production, including grapes for wine. Although much is known about what scion/shoot combinations work, less is known at the molecular and cellular level about successful grafts. How do two genetically different tissues interact? They must dedifferentiate and then reform as a new functional whole. Current studies are examining the processes that occur during graft formation, signals that cross the junction, and the causes of graft incompatibility. As the authors observe, a greater understanding of these processes can support the development of new scion/stock pairings that could potential aid in adaptation to climate change. (Summary by Mary Williams) J. Exp. Bot. 10.1093/jxb/ery422