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栀子CLE基因家族鉴定及表达分析

Identification and expression analysis of the CLE gene family in Gardenia jasminoides

  • 摘要: CLE基因家族在植物生长发育过程中具有重要作用,其部分家族成员与作物产量相关,对该家族的研究有助于提高栀子(Gardenia jasminoides)产量。基于基因组及转录组数据,对栀子CLE基因进行鉴定及系统发育分析,并对基因在不同组织及葡萄座腔菌(Botryosphaeria dothidea)侵染叶片的表达情况进行分析。栀子基因组中含有23个GjCLE基因,其中6个基因是新注释的基因;系统进化树分析表明,GjCLE可以分为7个分支,分布在分支IV的GjCLE5与GjCLE6均有N端信号肽,可能与CLAVATA3的功能相似;基因表达分析表明,GjCLE5在不同组织中均有表达,GjCLE6的表达仅在葡萄座腔菌侵染的叶片中检测到。初步推测GjCLE5GjCLE6是栀子果实心皮数候选基因,GjCLE6可能是其中的关键基因。

     

    Abstract: CLE gene family, some members of which are related with crop yield, plays vital roles in plant growth and development. Investigation of CLE genes will help to promote yield in Gardenia jasminoides. Based on the genome data of G. jasminoides, the CLE genes were identified, and phylogenetic analysis of CLE proteins were analyzed. The expression of G. jasminoides CLE genes in different tissues and Botryosphaeria dothidea-infested leaves was analyzed using transcriptome data. A total of 23 GjCLE genes, including 6 new annotated ones, were identified, and the corresponding proteins were divided into 7 groups according to the topology of phylogenetic tree. Both GjCLE5 and GjCLE6 in group IV had a N-terminal signal peptide and might functioned as CLAVATA3. The results of expression profiling indicated that GjCLE5 expressed in different tissues, while GjCLE6 was only detected in B. dothidea-infested leaves. We primitively believed that both GjCLE5 and GjCLE6 were candidate genes to regulate fruit carpel number in G. jasminoides, and GjCLE6 might be a key candidate gene.

     

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