Occurrence of stilbenoids in grapevine under Crown gall infection

It is established occurrence of phytoalexin stilbenoids in white and red grape varieties infected with crown gall disease ( Agrobacterium tumefaciens) in Georgia. The infected vine varieties – Rkatsiteli, Saperavi, Cabernet Sauvignon, Tsitska and Tsolikouri were identified in East and West regions of Georgia. Healthy vine varieties were taken from the same vineyards for studying. Stilbenoid- containing fractions were isolated from the infected and healthy vine trunks and was identified their stilbenoids profile. It is studied the variation of the physiological concentration of stress- metabolite stilbenoids – trans-resveratrol and trans -ε- viniferin in terms of crown gall disease. It is identified , that occurrence of the physiological concentration of stilbenoids -trans-resveratrol and trans -ε- viniferin in vine infected with crown gall disease depends on variety factor. The obtained results are important data to identify the correlation of the immunity of the grape varieties to the phytoalexin stilbenoids.