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31959099
Comparative transcriptome analysis reveals the response mechanism of Cf-16-mediated resistance to Cladosporium fulvum infection in tomato.

BMC Plant Biol, 2020/1/20;20(1):33.

Zhang D[1], Bao Y[1], Sun Y[1], Yang H[1], Zhao T[1], Li H[1], Du C[1], Jiang J[1], Li J[1], Xie L[2], Xu X[3]

Affiliations

PMID: 31959099DOI: 10.1186/s12870-020-2245-5

Impact factor: 5.26

Abstract
background: Leaf mold disease caused by Cladosporium fulvum is a serious threat affecting the global production of tomato. Cf genes are associated with leaf mold resistance, including Cf-16, which confers effective resistance to leaf mold in tomato. However, the molecular mechanism of the Cf-16-mediated resistance response is largely unknown.
results: We performed a comparative transcriptome analysis of C. fulvum-resistant (cv. Ontario7816) and C. fulvum-susceptible (cv. Moneymaker) tomato cultivars to identify differentially expressed genes (DEGs) at 4 and 8 days post inoculation (dpi) with C. fulvum. In total, 1588 and 939 more DEGs were found in Cf-16 tomato than in Moneymaker at 4 and 8 dpi, respectively. Additionally, 1350 DEGs were shared between the 4- and 8-dpi Cf-16 groups, suggesting the existence of common core DEGs in response to C. fulvum infection. The up-regulated DEGs in Cf-16 tomato were primarily associated with defense processes and phytohormone signaling, including salicylic acid (SA) and jasmonic acid (JA). Moreover, SA and JA levels were significantly increased in Cf-16 tomato at the early stages of C. fulvum infection. Contrary to the previous study, the number of up-regulated genes in Cf-16 compared to Cf-10 and Cf-12 tomatoes was significantly higher at the early stages of C. fulvum infection.
conclusion: Our results provide new insight into the Cf-mediated mechanism of resistance to C. fulvum, especially the unique characteristics of Cf-16 tomato in response to this fungus.

Keywords: Cf-16 tomato; Cladosporium fulvum; Comparative transcriptome; Molecular mechanism

MeSH terms
Cladosporium; Gene Expression Profiling; Lycopersicon esculentum; Plant Diseases; Plant Proteins
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