文献类型： 外文期刊

作者： Huang, Xin ¹ ; Peng, Xianjun ¹ ; Zhang, Lexin ¹ ; Chen, Shuangyan ¹ ; Cheng, Liqin ¹ ; Liu, Gongshe ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing, Peoples R China

2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China

3.ShangHai Acad Agr Sci, Forest & Fruit Tree Res Inst, Shanghai, Peoples R China

4.Heze Entry Exit Inspect & Quarantine Bur, Jinan, Shandong, Peoples R China

关键词： Leymus chinensis;Grazing;BSA deposition;RNA-seq;Apoptosis;Cell oxidative status

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2014 年 15 卷

页码：

收录情况： SCI

摘要： Background: Sheepgrass (Leymus chinensis) is an important perennial forage grass across the Eurasian Steppe and is adaptable to various environmental conditions, but little is known about its molecular mechanism responding to grazing and BSA deposition. Because it has a large genome, RNA sequencing is expensive and impractical except for the next-generation sequencing (NGS) technology. Results: In this study, NGS technology was employed to characterize de novo the transcriptome of sheepgrass after defoliation and grazing treatments and to identify differentially expressed genes (DEGs) responding to grazing and BSA deposition. We assembled more than 47 M high-quality reads into 120,426 contigs from seven sequenced libraries. Based on the assembled transcriptome, we detected 2,002 DEGs responding to BSA deposition during grazing. Enrichment analysis of Gene ontology (GO), EuKaryotic Orthologous Groups (KOG) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways revealed that the effects of grazing and BSA deposition involved more apoptosis and cell oxidative changes compared to defoliation. Analysis of DNA fragments, cell oxidative factors and the lengths of leaf scars after grazing provided physiological and morphological evidence that BSA deposition during grazing alters the oxidative and apoptotic status of cells. Conclusions: This research greatly enriches sheepgrass transcriptome resources and grazing-stress-related genes, helping us to better understand the molecular mechanism of grazing in sheepgrass. The grazing-stress-related genes and pathways will be a valuable resource for further gene-phenotype studies.