Transcriptome analysis of the disease resistance in postharvest pears induced by Meyerozyma guilliermondii combined with alginate oligosaccharide

Abstract

It has been reported that the antagonistic efficacy of M. guilliermondii combined with alginate oligosaccharide (AOS) could enhanced in controlling the postharvest diseases of pears. The possible physiological biocontrol mechanisms has been unveiled in our previously research, however, the related molecular mechanisms were unclear. In this study, the possible molecular mechanisms behind the enhanced antagonistic efficacy of M. guilliermondii combined with AOS based on transcriptome technology were investigated. Our results suggested that M. guilliermondii can induce the resistance of pears mainly from promoting signal transduction, inducing up-regulation of several disease-resistance genes and defense genes, improving the ability of antioxidant stress, promoting the synthesis of resistant substances, maintaining the integrity of cell membrane and cell wall strength and increasing the expression levels of genes closely related to resistance. M. guilliermondii combined with AOS can further improve the resistance of pears by promoting the synthesis of resistant substances, inducing the up-regulation of resistance related genes, promoting signal transduction, regulating the expression levels of genes closely related to resistance and maintaining the strength of cell wall.