Biochemical and transcriptomic analysis of host responses to yeast biocontrol agents of postharvest pathogens
Samir Droby, Vera Hershkovitz, Ginat Raphael, Michael Wisniewski
Abstracts of 7th International Postharvest Symposium 2012 (IPS2012). 25-29 June, 2012. Putra World Trade Centre (PWTC), Kuala Lumpur, Malaysia. 238 pages.
2012
บทคัดย่อ
Although the bio control activity of antagonistic yeasts has been demonstrated on a variety of commodities, the mode of action of these microbial bio control agents has not been fully elucidated. Antagonistic yeasts of postharvest pathogens have been reported to induce several biochemical defence responses in host tissues of surface-wounded fruit. The interaction of yeast cells with fruit tissue resulted in major responses of the fruit that included enhanced production ROS, phytoalexins, fungal cell wall degrading enzymes and the formation of structural barriers such as deposition of papillae and lignin in host cell walls. We have also shown that interaction of yeast cells with fruit tissue alter volatile profile by down-regulation or up-regulation of certain compounds.