Transcriptomic analysis of topping-induced axillary shoot outgrowth in Nicotiana tabacum

文献类型： 外文期刊

第一作者： Wang, Wei-feng

作者： Wang, Wei-feng;Lv, Jing;Chen, Lei;Sun, Yu-he;Wang, Wei-feng;Chen, Lei;Chen, Peng

作者机构：

关键词： Nicotiana tabacum;Axillary shoot outgrowth;Differentially expressed genes;Sugars;Hormone signal

期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）

ISSN： 0378-1119

年卷期： 2018 年 646 卷

页码：

收录情况： SCI

摘要： Topping is an important agronomic practice that significantly impacts the yield of various crop plants. Topping and the regulation of axillary shoot outgrowth are common agronomic practices in tobacco. However, the effects of topping on gene expression in tobacco remain unknown. We applied the Illumina HiSeq (TM) 2000 platform and analyzed differentially expressed genes (DEGs) from untopped and topped plants to study the global changes in gene expression in response to topping. We found that the number of DEGs varied from 7609 to 18,770 based on the reads per kilobase per million mapped reads (RPKM) values. The Gene Ontology (GO) enrichment analysis revealed that the cellular carbohydrate metabolic process and the disaccharide metabolic process, which may contribute to starch accumulation and stress/defense, were overrepresented terms for the DEGs. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that many DEGs were involved in starch and sucrose metabolism, glycolysis/gluconeogenesis, pyruvate metabolism, and plant hormone signal transduction, among other processes. The knowledge gained will improve our understanding of the processes of axillary shoot formation and enlargement at the transcriptional level. This study lays a solid foundation for future studies on molecular mechanisms underlying the growth of axillary shoots.

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