Differential physiological responses of resistant and susceptible grape cultivars to Eutypa dieback.

ABSTRACT: Eutypa lata is a fungal pathogen of grapevine that causes widespread economic damage and threatens vineyard longevity worldwide. This study was initiated to further understanding of how grapevines resist E. lata infections, using an integrated approach combining inoculation assays in the greenhouse with physiological and biochemical measurements. Resistant 'Zinfandel' and susceptible 'Syrah' grapevines were subjected to control and inoculation treatments, and assessed for gas exchange, water status, photosynthetic biochemistry, hydraulic conductivity, wood chemistry, and fungal spread (lesion length). Infection reduced leaf photochemical function and gas exchange in Zinfandel and increased these variables in Syrah (P<0.05). Infection produced shorter lesions in Zinfandel (P<0.05), suggesti

SUBMITTER: Sinclair GC 

PROVIDER: S-EPMC12321739 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature