Possible involvement of flavonoids in response of mulberry (Morus alba L.) to infection with Ralstonia solanacearum (Smith 1896) Yabuuchi et al., 1996

文献类型： 外文期刊

第一作者： Dai, Fanwei

作者： Dai, Fanwei;Luo, Guoqing;Wang, Zhenjiang;Kuang, Zheshi;Li, Zhiyi;Huang, Jing;Tang, Cuiming

作者机构：

关键词： bacterial wilt; chalcone; disease resistance; flavonoid; gene expression; transcriptome

期刊名称：EUROPEAN JOURNAL OF HORTICULTURAL SCIENCE （ 影响因子：1.482； 五年影响因子：1.503 ）

ISSN： 1611-4426

年卷期： 2019 年 84 卷 3 期

页码：

收录情况： SCI

摘要： Bacterial wilt in mulberry (Morus atropurpurea), caused by the phytopathogenic bacteria Ralstonia solanacearum, is one of the most important production constraints in many tropical and subtropical areas. In our previous work, we have investigated gene expression changes in mulberry at the early stages of R. solanacearum infection. In this work we have investigated transcriptional changes in mulberry that occur during all infection process caused by R. solanacearum in mulberry. Analysis of gene expression changes in two mulberry cultivars, following infection with R. solanacearum, revealed that expression of a series of genes associated with flavonoid biosynthesis was significantly involved into infection at all treated time points. Specifically, the expression of genes encoding the key-enzymes involved in flavonoid biosynthesis - such as chalcone synthase, chalcone isomerase, and flavonoid 3'-hydroxylase - were altered, and most of these genes were regulated more significantly in resistant cultivar KQ10 than in susceptible cultivar YSD10 after infection with R. solanacearum. We obtained full-length sequences of these three genes and additional transcriptional and phytochemical evidence to verify this result using qPCR and aluminum chloride colorimetry. This work indicates that flavonoids may play important roles in bacterial wilt resistance for mulberry plants and provides valuable gene targets for breeding disease-resistant mulberry cultivars.

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