Graft Transmission of Systemic Resistance of Cucumber to Anthracnose Induced byColletotrichum lagenariumand Tobacco Necrosis Virus

Publisher Website
Google Scholar
Abstract
Resistance to anthracnose, which was induced by infection of the first true leaf of cucumber [Cucumis sativus] cultivar SMR-58 with C. lagenarium or tobacco necrosis virus (TNV), was transmitted to a scion of the same cultivar grafted onto the infected plant above the first true leaf. Resistance also was transmitted if grafting preceded the inducing inoculation. Resistance to anthracnose in susceptible cucumber was not transmitted by grafting onto uninoculated resistant cultivars but it was transmitted if the resistant rootstocks were inoculated with C. lagenarium. Susceptible cucumbers remained susceptible to anthracnose when grafted onto rootstocks of pumpkin [Cucurbita pepo] and squash [Cucurbita sp.] which were uninoculated or inoculated with C. lagenarium or TNV. C. lagenarium did not produce visible lesions on pumpkin or squash leaves, but TNV did so. Watermelons [Citrullus vulgaris] and muskmelons [Cucumis melo] grafted onto susceptible cucumber rootstocks were protected against anthracnose by inoculating the rootstocks with C. lagenarium. The signal for induced systemic resistance is not cultivar-, genus-, or species-specific.

This publication has 1 reference indexed in Scilit: