Monilinia fructicola genes involved in the cell wall-degrading process in early nectarine infection

桃褐腐病菌 分生孢子 生物 果胶酶 微生物学 毒力 基因表达 细胞壁 基因 植物 生物化学 采后
作者
Juan Diego Astacio,P. Melgarejo,A. De Cal,Eduardo A. Espeso
出处
期刊:International Journal of Food Microbiology [Elsevier]
卷期号:419: 110750-110750
标识
DOI:10.1016/j.ijfoodmicro.2024.110750
摘要

Brown rot symptoms may be linked to alterations in the gene expression pattern of genes associated with cell wall degradation. In this study, we identify key carbohydrate-active enzymes (CAZymes) involved in cell wall degradation by Monilinia fructicola, including pme2 and pme3 (pectin methylesterases), cut1 (cutinase) and nep2 (necrosis-inducing factor). The expression of these genes is significantly modulated by red and blue light during early nectarine infection. The polygalacturonase gene pg1 and the cellulase gene cel1 also exhibit photoinduction albeit to a lesser extent. Red and blue light cause an acceleration in the initial stages of brown rot development caused by M. fructicola on nectarines. Disease symptoms like tissue maceration were evident after an incubation period of 24 h followed by 14 h of light exposition, in contrast to the usual incubation period of 48 to 72 h. Furthermore, the culture media exerts an impact on gene regulation, suggesting a complex interplay between light and nutrient signalling pathways in M. fructicola. In addition, we observe that red light promotes colony growth on a 12 h photoperiod and consistently reduces conidiation. In contrast, blue light hampers growth rate on both the 12 h and the 8 h photoperiod but only diminishes conidiation on the 12 h photoperiod. These findings enhance our comprehension of genes associated with cell wall degradation and the environmental factors influencing brown rot development.
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