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How Does Host Carbon Concentration Modulate the Lifestyle of Postharvest Pathogens during Colonization?

文献类型: 外文期刊

作者: Prusky, Dov B. 1 ; Bi, Fangcheng 2 ; Moral, Juan 3 ; Barad, Shiri 1 ;

作者机构: 1.Agr Res Org, Voicani Ctr, Dept Postharvest Sci Fresh Produce, Belt Dagan, Israel

2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr, Guangzhou, Guangdong, Peoples R China

3.Univ Cordoba, Dept Agron, Cordoba, Spain

关键词: small effector molecules;pH regulation;pathogenicity;postharvest susceptibility;colletotrichum;penicillium

期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:5.753; 五年影响因子:6.612 )

ISSN: 1664-462X

年卷期: 2016 年 7 卷

页码:

收录情况: SCI

摘要: Postharvest pathogens can penetrate fruit by breaching the cuticle or directly through wounds, and they show disease symptoms only long after infection. During ripening and senescence, the fruit undergo physiological processes accompanied by a decline in antifungal compounds, which allows the pathogen to activate a mechanism of secretion of small effector molecules that modulate host environmental pH. These result in the activation of genes under their optimal pH conditions, enabling the fungus to use a specific group of pathogenicity factors at each particular pH. New research suggests that carbon availability in the environment is a key factor triggering the production and secretion of small pH-modulating molecules: ammonia and organic acids. Ammonia is secreted under limited carbon and gluconic acid under excess carbon. This mini review describes our most recent knowledge of the mechanism of activation of pH-secreted molecules and their contribution to colonization by postharvest pathogens to facilitate the transition from quiescence to necrotrophic lifestyle.

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