Comparative transcriptome analysis provides insights into the distinct germination in sheepgrass (Leymus chinensis) during seed development

文献类型： 外文期刊

第一作者： Li, Xiaoxia

作者： Li, Xiaoxia;Liu, Shu;Yuan, Guangxiao;Yang, Weiguang;Cheng, Liqin;Qi, Dongmei;Chen, Shuangyan;Liu, Gongshe;Liu, Shu;Yang, Weiguang;Zhao, Pincang;Yang, Weiguang;Jia, Junting

作者机构：

关键词： Sheepgrass; Germplasm; Seed development; Seed dormancy and germination; Transcriptome sequencing; DEGs

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN： 0981-9428

年卷期： 2019 年 139 卷

页码：

收录情况： SCI

摘要： Sheepgrass (Leymus chinensis ((Trin.) Tzvel)) is an important perennial forage grass that is widely distributed in the Eurasia steppe. The seed germination percentage show significant variation among the different germplasm in sheepgrass. However, the underlying molecular mechanisms of distinct germination during seed development are still mostly unknown. Here, we performed comparative transcriptomic analyses of high seed germination percentage (H) and low seed germination percentage (L) at 14, 28, and 42 days after pollination. After comparing 3 consecutive development stages, 9255, 5366, and 4306 genes were found to be significantly differently expressed between H and L. Pathway analysis indicated that transcripts related to starch and sucrose metabolism, phenylpropanoid biosynthesis, plant hormone signal transduction, amino sugar and nucleotide sugar metabolism, and photosynthesis were significantly changed between the two germplasm at three stages. ABA and GA metabolism- and signaling transduction-related genes were differentially expressed between two germplasm at development stages, suggesting that the reduced signaling of GA and ABA is likely to be related to seed germination and dormancy in sheepgrass. We also identified 81 transcription factor (TF) families, and some TFs genes such as NAC48, NAC78, WRICY80, ZnFP, C3H14 and ILR3 were significantly differential expressed in two germplasm. Our results provide insights into seed development, germination and dormancy in sheepgrass at the transcriptional level.

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