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Comprehensive analysis of differentially expressed genes under salt stress in pear (Pyrus betulaefolia) using RNA-Seq

文献类型： 外文期刊

作者： Li, Hui 1 ; Lin, Jing 1 ; Yang, Qing-Song 1 ; Li, Xiao-Gang 1 ; Chang, You-Hong 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Hort, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Jiangsu, Peoples R China

关键词： P. betulaefolia;Salt stress;DEG;Enrichment analysis;RNA-Seq

期刊名称：PLANT GROWTH REGULATION （ 2020影响因子：3.412； 五年影响因子：3.691 ）

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收录情况： SCI

摘要： Pear is one of the most important fruit trees in temperate zones, and is cultivated widely throughout the world. Salt stress affects the normal growth of pear, and further affects fruit yield and quality. Pyrus betulaefolia is a common rootstock in pear orchards, which can improve salt tolerance by grafting pear onto it. However, limited availability of P. betulaefolia genomic information has hindered research on the mechanisms underlying this tolerance. Consequently, we comprehensively analyzed P. betulaefolia salt tolerance using RNA-Seq under NaCl and NaCl + LaCl3 treatments in leaf and root. Based on mapping analyses, 3796 novel transcripts were identified, which contained 18 differentially expressed genes (DEGs). There were 90,752 alternative splicing events identified, with transcription start site and transcription terminal site as the major splicing patterns. In addition, we identified 583 differential expressed exons. A total of 276 DEGs were identified among all six comparisons, and 237 of these were up-regulated and 39 were down-regulated. One DEG (Pbr038831.1) was detected in all treatments, and was up-regulated. All DEGs were divided into three clusters according to hierarchical clustering. Kyoto Encyclopedia of Genes and Genomes enrichment analyses showed that 18 DEGs were located in six significantly enriched terms, and specific enriched categories and DEGs were identified for NaCl and NaCl + LaCl3 treatments. All of these enriched genes may be related to salt stress in P. betulaefolia. This transcriptome analysis will provide a rich genetic resource for gene discovery related to salt tolerance in P. betulaefolia and closely related species. The data will serve as an important public information platform to further understanding of the molecular mechanisms involved in salt tolerance in P. betulaefolia.

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