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Comparative transcriptome analysis of Ts (Resistant genotype) and Ma (Susceptible genotype) marigold ( Tagetes erecta L.) leaves in response to Alternaria tagetica

文献类型： 外文期刊

作者： Cheng, Xi 1 ; Chen, Dongliang 1 ; Luo, Chang 1 ; Liu, Hua 1 ; Huang, Conglin 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, Beijing 100097, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Engn Res Ctr Funct Floriculture, Beijing 100097, Peoples R China

关键词： Tagetes erecta; Co -expression network; Gene expression; Black spot resistance; Transcriptional modules

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：5.4 ）

ISSN： 2095-9885

年卷期： 2023 年 9 卷 2 期

页码：

收录情况： SCI

摘要： Marigold black spot caused by Alternaria tagetica is a major disease that can decrease marigold production by 40%, resulting in serious eco-nomic losses. In this study, we identified many genes responsive to A. tagetica in the resistant and susceptible marigold genotypes. Analyses of differentially expressed genes, expression trends, and a weighted gene co-expression network revealed a series of hub genes with key roles in different A. tagetica infection stages. Additionally, 1 216 unigenes encoding transcription factors from eight families were differentially ex-pressed between Ts and Ma. Moreover, R genes from various families (e.g., N , NL, RLP, and TNL) were differentially expressed in the two marigold genotypes before and after the inoculation with A. tagetica. Pathway diagrams were used to visualize the leaf transcriptional changes in the two marigold genotypes infected by A. tagetica to clarify the effects of A. tagetica on the expression patterns of genes involved in phosphatidylinositol signaling, plant-pathogen interactions, and plant hormone signal transduction. We identified candidate genes related to disease resistance and generated valuable resources for analyzing the candidate gene functions related to black spot resistance in marigold. The study data may be useful for the molecular marker-assisted screening and breeding of marigold lines with increased disease resistance.

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