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Identification of secondary metabolite biosynthetic gene clusters associated with the infection of citrus fruit by Penicillium digitatum

文献类型： 外文期刊

作者： Zhu, Congyi 1 ; Sheng, Donglai 3 ; Wu, Xiaodan 5 ; Wang, Mingshuang 1 ; Hu, Xu 3 ; Li, Hongye 1 ; Yu, Dongliang 3 ;

作者机构： 1.Zhejiang Univ, Inst Biotechnol, Hangzhou 310058, Zhejiang, Peoples R China

2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China

3.Hangzhou Normal Univ, Inst Life Sci, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China

4.Hangzhou Normal Univ, Zhejiang Key Lab Organ Dev & Regenerat, Hangzhou 310036, Zhejiang, Peoples R China

5.Zhejiang Univ, Anal Ctr Agrobiol & Environm Sci, Hangzhou 310058,

关键词： Citrus green mold;Secondary metabolites;Genomic synteny;Pathogen-host interaction

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：5.537； 五年影响因子：5.821 ）

ISSN： 0925-5214

年卷期： 2017 年 134 卷

页码：

收录情况： SCI

摘要： Penicillium digitatum is one of the primary cause agents of postharvest loss of citrus fruits. Although a number of the secondary metabolites (SMs) that it produces have been identified, their biosynthesis pathways and biological roles in infection and decay development have not been fully characterized to date. In the present study, three SM biosynthesis pathways were identified using domain characterization, comparative genomics and co-regulation analysis. These pathways include the tryptoquialanines (TQA) biosynthesis pathway that was up-regulated during fruit infection. Subsequently, a gene knockout mutant was constructed, which revealed that the tqaA gene was involved in TQA production in P. digitatum. However, no significant variation was detected between the non-TQA mutant and the wild-type strain in fungal growth, development, stress responses or pathogenicity. In summary, this study improved the annotation of three SM biosynthesis pathways possibly involved in the infection of citrus hosts by P. digitatum. However, further investigation revealed that one of the products, TQA, was not involved in the interaction between P. digitatum and their citrus hosts.

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