Xylem cavitation susceptibility and refilling mechanisms in olive trees infected by Xylella fastidiosa.

ABSTRACT: In olive trees, Xylella fastidiosa colonizes xylem vessels and compromises water transport causing the olive quick decline syndrome (OQDS). The loss of hydraulic conductivity could be attributed to vessel occlusions induced both by the bacteria biofilm and by plant responses (tyloses, gums, etc.) that could trigger embolism. The ability of the infected plants to detect embolism and to respond, by activating mechanisms to restore the hydraulic conductivity, can influence the severity of the disease symptomatology. In order to investigate these mechanisms in the X. fastidiosa-resistant olive cultivar Leccino and in the susceptible Cellina di Nardò, sections of healthy olive stems were analysed by laser scanning microscope to calculate the cavitation vulnerability index. Findings indicated th

SUBMITTER: Sabella E 

PROVIDER: S-EPMC6610111 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature