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Comparative transcriptome analysis reveals heat stress-responsive genes and their signalling pathways in lilies (Lilium longiflorumvs.Lilium distichum)

文献类型： 外文期刊

作者： Fu, Yongyao 1 ; Yang, Liping 1 ; Gao, Haihong 1 ; Wenji, Xu 1 ; Li, Qiang 2 ; Li, Hongqun 1 ; Gao, Jian 1 ;

作者机构： 1.Yangtze Normal Univ, Sch Adv Agr & Bioengn, Chongqing, Peoples R China

2.Southwest Univ, Chinese Acad Agr Sci, Citrus Res Inst, Chongqing, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2020 年 15 卷 10 期

页码：

收录情况： SCI

摘要： The lily, a famous bulbous flower, is seriously affected by high temperatures, which affect their growth and production. To date, the signalling pathways and the molecular mechanisms related to heat response inLiliumhave not been elucidated. In this study, a comparative transcriptome analysis was performed in an important thermo-tolerant flower,L.longiflorum, and a thermo-sensitive flower,L.distichum. Lily seedlings were first exposed to heat stress at 42 degrees C for different lengths of time, and the optimal time-points (2 h and 24 h) were selected for RNA sequencing (RNA-seq). Approximately 66.51, 66.21, and 65.36 Mb clean reads were identified from three libraries ofL.longiflorum(LL_CK, LL_T2h and LL_T24h, respectively) and 66.18, 66.03, and 65.16 Mb clean reads were obtained from three libraries ofL.distichum(LD_CK, LD_T2h and LD_T24h, respectively) after rRNA removing. A total of 34,301 unigenes showed similarity to known proteins in the database NCBI non-redundant protein (NR), Swiss-Prot proteins, InterPro proteins, Clusters of Orthologous Groups (COG) and Kyoto Encyclopedia of Genes and Genomes (KEGG). In addition, 1,621 genes were differentially expressed in the overlapping libraries between LL_DEGs and LD_DEGs; of these genes, 352 DEGs were obviously upregulated inL.longiflorumand downregulated inL.distichumduring heat stress, including 4-coumarate, CoA ligase (4CL), caffeoyl-CoA O-methyltransferase (CCoAOMT), peroxidase, pathogenesis-related protein 10 family genes (PR10s), 14-3-3 protein, leucine-rich repeat receptor-like protein kinase, and glycine-rich cell wall structural protein-like. These genes were mainly involved in metabolic pathways, phenylpropanoid biosynthesis, plant-pathogen interactions, plant hormone signal transduction, and kinase signalling pathways. Quantitative RT-PCR was performed to validate the expression profiling of these DEGs in RNA-seq data. Taken together, the results obtained in the present study provide a comprehensive sequence resource for the discovery of heat-resistance genes and reveal potential key components that are responsive to heat stress in lilies, which may help to elucidate the heat signal transcription networks and facilitate heat-resistance breeding in lily.

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