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园艺学报 ›› 2011, Vol. 38 ›› Issue (10): 1999-2004.

• 研究报告 • 上一篇    下一篇

野蔷薇(Rosa multiflora)抗白粉病基因RmMlo的克隆与表达分析

邱显钦1,2,包满珠1,张 颢1,2,蹇洪英2,王其刚2,晏慧君2,张 婷2,唐开学2,*   

  1. (1华中农业大学园艺林学学院,教育部园艺植物生物学重点实验室,武汉 430070;2云南省农业科学院花卉研究所,云南省花卉育种重点实验室,昆明 650205)
  • 收稿日期:2011-04-09 修回日期:2011-08-31 出版日期:2011-10-25 发布日期:2011-10-25
  • 通讯作者: 唐开学2,*

Cloning and Expression Analysis of Resistance Powdery Mildew Gene RmMlo in Rosa multiflora

QIU Xian-qin1,2,BAO Man-zhu1,ZHANG Hao1,2,JIAN Hong-ying2,WANG Qi-gang2,YAN Hui-jun2,ZHANG Ting2,and TANG Kai-xue2,*   

  1. (1College of Horticulture and Forestry,Huazhong Agricultural University,Key Laboratory of Horticultural Plant Biology,Ministry of Education,Wuhan 430070,China;2Flower Research Institute,Yunnan Academy of Agricultural Sciences,Yunnan Flower Breeding Key Lab,Kunming 650205,China)
  • Received:2011-04-09 Revised:2011-08-31 Online:2011-10-25 Published:2011-10-25
  • Contact: TANG Kai-xue2,*

摘要: 以野蔷薇(Rosa multiflora)为试材,采用RT-PCR和RACE方法从叶片中获得了一个Mlo同源基因的cDNA全长,命名为RmMlo,GenBank登录号为JF 310747。序列分析结果表明,RmMlo基因cDNA全长为1 993 bp,包含49 bp的5′非编码区、243 bp的3′非编码区和一个长度为1 700 bp编码567个氨基酸的开放阅读框。氨基酸序列分析显示其蛋白质的C末端具有两个保守的MLO模体。序列比对和系统进化分析表明,RmMlo与拟南芥等双子叶植物的Mlo亲缘关系较近,相似性达90%以上。半定量RT-PCR分析表明,RmMlo在感病叶片中的表达量最高,在根中不表达,其表达模式与拟南芥的AtMlo有一定差别。

关键词: 野蔷薇, 月季, 白粉病, Mlo基因, 克隆, 组织特异性表达

Abstract: In this research,a full-length cDNA sequence of Mlo gene,named RmMlo(GenBank accession No. JF310747)was obtained from leaves of Rosa multiflora by RT-PCR and RACE. Sequence analysis indicated that RmMlo was 1 993 bp in full length containing a 5′-untranslated region(5′-UTR)of 49 bp,a 3′-UTR of 243 bp,and an opening reading frame(ORF)of 1 700 bp encoding 567 amino acids. Subsequently,amino acid sequence analysis revealed that RmMlo had two conserved MLO motifs in the protein C-terminal. Sequence alignment and phylogenetic analysis showed that RmMlo shared more than 90% homology with Mlo from Arabidopsis thaliana and other dicotyledon. Finally,semiquantitative RT-PCR analysis indicated that RmMlo showed the highest expression abundance in infected leaves and no expression in root,which was different from the expression pattern of AtMlo.

Key words: Rosa multiflora, rose, powdery mildew, Mlo, clone, tissue-specific expression

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