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De novo transcriptome assembly of Coffea liberica reveals phylogeny and expression atlas of phenylalanine ammonia-lyase genes in Coffea species

文献类型： 外文期刊

作者： Huang, Xing 1 ; Bai, Xuehui 2 ; Xie, Zhouli 3 ; Fahad, Shah 4 ; Gbokie Jr., Thomas 5 ; Lu, Ying 1 ; Guo, Tieying 2 ; Li, Jinhong 2 ; Zhang, Zhirun 2 ; Wu, Weihuai 1 ; Yi, Kexian 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China

2.Dehong Trop Agr Res Inst Yunnan, Ruili 678600, Peoples R China

3.Peking Univ, Sch Life Sci, Beijing 100871, Peoples R China

4.Abdul Wali Khan Univ Mardan, Dept Agron, Khyber Pakhtunkhwa 23200, Pakistan

5.Nanjing Agr Univ, Coll Plant Protect, Nanjing 210095, Peoples R China

6.Minist Agr & Rural Affairs, Key Lab Integrated Pest Management Trop Crops, Haikou 571101, Peoples R China

7.Hainan Key Lab Monitoring & Control Trop Agr Pests, Haikou 571101, Peoples R China

关键词： Coffea liberica; Transcriptome; Phenylalanine ammonia-lyase; Phylogeny; Expression; Leaf rust

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.9； 五年影响因子：6.0 ）

ISSN： 0926-6690

年卷期： 2023 年 192 卷

页码：

收录情况： SCI

摘要： Coffea liberica is wildly cultivated for producing Liberian coffee which ranks only after the Arabica (Coffea arabica) and Robusta (Coffea canephora) coffees. Another strength of Coffea liberica is its resistance to the devasting leaf rust fungus Hemileia vastatrix. In order to make a comprehensive understanding of the molecular specificity of Coffea liberica on coffee growth and defense, we hence assembled the first leaf transcriptome of Coffea liberica and finally generated 55,446 transcripts with about 70 % of them annotated in public databases. The maximum likelihood phylogenetic tree of single copy proteins in Coffea species revealed that Coffea liberica was closely related with Coffea canephora. Considering the important roles of phenylalanine ammonia-lyase (PAL) genes in growth and defense regulation of plants, we further characterized PALs in four coffee species. The result showed that six, four, four and three PAL genes exist in Coffea arabica, Coffea eugenioides, Coffea canephora and Coffea liberica, respectively. The phylogenetic tree was constructed with maximum likelihood method, which also revealed the species-specific evolution of PAL genes in model plants and coffee species. Although there was a slight expansion of PAL1 subgroup in Coffea arabica, the fractionation after tetraploidy might cause this diver-sion. Moreover, in silico expression analysis indicated PAL1s had expression dominance of in Coffea arabica. PAL genes were induced by leaf rust fungus, which showed higher induction in the resistant variety Hibrido de Timor (HDT) compared with the susceptible variety Caturra. Taken together, our study not only enriches the bio-information of transcripts in Coffea liberica, but also provides the evidences that PAL genes could control the agronomic traits related to disease resistance and secondary phenylpropanoid metabolites.

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