Contrasting Susceptibilities to Flavescence Doree in Vitis vinifera, Rootstocks and Wild Vitis Species.

ABSTRACT: Flavescence dorée (FD) is a quarantine disease of grapevine, involving interactions between the plants, leafhopper vectors, and FD phytoplasma. Characterizing the susceptibility of vine varieties could limit disease propagation. After extensive surveys in vineyards, we showed that Cabernet Sauvignon (CS) is highly susceptible, with a high proportion of symptomatic branches and phytoplasma titers, in contrast to Merlot (M). Localized insect transmissions and grafting showed that phytoplasma circulate in the whole plant in the CS cultivar, but in M they are restricted to the transmission point. Insect-mediated transmission under high confinement mimicking natural conditions confirmed these phenotypes and allowed the classification of 28 Vitis accessions into three distinct categories,

SUBMITTER: Eveillard S 

PROVIDER: S-EPMC5126068 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature