拟南芥不定芽发生早期的数字基因表达谱分析

Digital gene expression profiling analysis of the early adventitious shoot formation in Arabidopsis thaliana

摘要:

目前，有关不定芽发生的研究主要集中在单基因的调控方面，缺乏转录组方面的系统研究。利用RNA-seq高通量测序技术在全基因组范围内检测了不定芽发生早期的基因表达谱，共检测到2 457个差异表达基因。这些基因参与了激素代谢和信号转导、愈伤组织和侧根的形成、茎顶端分生组织的发育和光合作用等过程。进一步的途径富集分析表明，不定芽发生早期苯丙氨酸代谢和苯丙胺素合成等途径相关的基因显著富集。并且苯丙氨酸可以显著抑制不定芽的发生，暗示了苯丙氨酸代谢和苯丙胺素的合成可能在不定芽发生过程起着重要的作用。

Abstract:

Most current research in the field of adventitious shoot formation is focused on the regulatory function of a single gene. However, a systematic transcriptomic analysis of the early adventitious shoot formation is still lacking. Here, we analyzed the transcriptome profiling of the early adventitious shoot formation in Arabidopsis by RNA-seq high throughput sequencing technology, and identified 2 457 differentially expressed genes. Detailed categorization revealed that these genes were mainly involved in hormone homeostasis or signal transduction, callus and lateral root formation, shoot apical meristem development and photosynthesis. Further pathway enrichment analysis showed that genes involved in phenylalanine metabolism and phenylpropanoid biosynthesis were significantly enriched. Moreover, exogenous phenylalanine could repress adventitious shoot formation, indicating that phenylalanine metabolism and phenylpropanoid biosynthesis might be important for adventitious shoot formation.