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Comprehensive Transcriptome Analysis Reveals Genes I.n Response To Water D eficit In The Leaves Of Saccharum Narenga (Nees Ex Steud.) Hack

文献类型： 外文期刊

作者： Zhang, Ronghua;Liu, Xihui;Li, Yangrui;Tan, Hongwei;Ou, Huiping;Wei, Jinju;Gui, Yiyun;Zhou, Hui;Liu, Xihui;Li, Yangrui

作者机构：

关键词： Water deficit; Drought; Sugarcane; Leaves; Transcriptorne

期刊名称： BMC PLANT BIOLOGY

ISSN： 1471-2229

年卷期： 2018 年 18 卷

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摘要： Background: Sugarcane is an important sugar and energy crop that is widely planted in the world. Among the environmental stresses, the water-deficit stress is the most limiting to plant productivity. Some groups have used PCR-based and microarray technologies to investigate the gene expression changes of multiple sugarcane cultivars under water stress. Our knowledge about sugarcane genes in response to water deficit is still poor. Results: A wild sugarcane type, Saccharum narenga, was selected and treated with drought stress for 22 days. Leaves from drought treated (DTS) and control (CK) plants were obtained for deep sequencing. Paired-end sequencing enabled us to assemble 104,644 genes (N50 =1605 bp), of which 38,721 were aligned to other databases, such as UniProt NR, GO, KEGG and Pfam. Single-end and paired-end sequencing identified 30297 genes (> 5 TPM) in all samples. Compared to CK, 3389 differentially expressed genes (DEGs) were identified in DTS samples, comprising 1772 up-regulated and 1617 down-regulated genes. Functional analysis showed that the DEGs were involved in biological pathways like response to blue light, metabolic pathways and plant hormone signal transduction. We further observed the expression patterns of several important gene families, including aquaporins, late embryogenesis abundant proteins, auxin related proteins, transcription factors (TFs), heat shock proteins, light harvesting chlorophyll a-b binding proteins, disease resistance proteins, and ribosomal proteins. Interestingly, the regulation of genes varied among different subfamilies of aquaporin and ribosomal proteins. In addition, DIVARICATA and heat stress TFs were first reported in sugarcane leaves in response to water deficit Further, we showed potential miRNAs that might be involved in the regulation of gene changes in sugarcane leaves under the water-deficit stress. Conclusions: This is the first transcriptome study of Saccharum narenga and the assembled genes are a valuable resource for future research. Our findings will improve the understanding of the mechanism of gene regulation in sugarcane leaves under the water-deficit stress. The output of this study will also contribute to the sugarcane breeding program.

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