Induced resistance in peach fruit as treated by Pichia guilliermondii and their possible mechanism

Abstract

This research aims to assess the effect of Pichia guilliermondii treatment on the improved disease resistance of the peach fruit and to explore the biocontrol mechanisms. Infection rate and lesion diameter of the yeasttreated fruit were substantially inhibited after Rhizopus stolonifer and Penicillium expansum infection, respectively. A significant increase in endogenous salicylic acid (SA) content was stimulated in peach fruit treated with P. guilliermondii. The activities of defense-related enzymes and the SA synthase in peaches were also improved after P. guilliermondii treatment, and the expression of pathogenesis-related genes was activated. Thus, P. guilliermondii may be a biological elicitor-activated systemic acquired resistance by the SA signaling pathway. The new understanding regarding the mechanism of antagonist yeast could could be conducive for controlling fruit postharvest diseases in the future. ARTICLE HISTORY

Use of New BTH Derivative as Supplement or Substitute of Standard Fungicidal Program in Strawberry Cultivation

“…The impact of BTHWA on the development of Rhizopus stolonifer was also considered within the experiment performed, but as the level of attack of this pathogen was very low in general, it was difficult to establish significant differences. The information on the positive effect of SAR mechanism on the infection with Rhizopus stolonifer has been reported by Zhao et al [62].…”

Recent Insights into the Use of Antagonistic Yeasts for Sustainable Biomanagement of Postharvest Pathogenic and Mycotoxigenic Fungi in Fruits with Their Prevention Strategies against Mycotoxins

“…While studies indicate that their biocontrol efficiency may be increased, limited studies examine the combined effect on the antimycotoxigenic characteristics of yeasts. There are several studies combining agents, such as β-glucan, , phytic acid, methyl jasmonate, , melatonin, N -acetylglucosamine, γ-aminobutyric acid, cinnamic acid, glycine betaine, ,, chitosan, , calcium chloride, and arginine . Apart from the combination with an agent, the impact of different processes on the efficiency of the antagonistic yeast was also investigated, including hot air, microwave, UV-C irradiation, − and heat shock .…”

Analysis of long non-coding RNAs and mRNAs in harvested kiwifruit in response to the yeast antagonist, Wickerhamomyces anomalus

“…Among these various mechanisms, the induction of host resistance is especially intriguing. Studies have shown that antagonistic yeasts can increase resistance-related enzyme activity [such as β-1,3-glucanase, phenylalanine ammonia-lyase, peroxidase, (POD), and polyphenol oxidase (PPO)] in fruit, and the expression of stress resistance genes that have been associated with enhanced resistance to biotic and abiotic stress [8] , [9] . Therefore, a comprehensive understanding of the mechanisms underlying the ability of an antagonistic yeast to prevent postharvest infections and maintain quality can provide information that can be used to apply this technology in an efficient and effective manner.…”