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Position: Home > Articles > Cloning and expression analysis of histidinol dehydrogenase(KdHDH) gene in Kalanchoe daigremontiana Jiangsu Journal of Agricultural Sciences 2017 (2) 280-287

大叶落地生根组氨醇脱氢酶基因克隆及表达分析

作  者:
葛永强;张利娟;杜小姣;朱敏群;黄慧青;梁小红;钟天秀
单  位:
深圳市日昇园林绿化有限公司;暨南大学深圳旅游学院;北京林业大学林学院草坪研究所;华南农业大学林学与风景园林学院草业科学系/广东省草业工程技术研究中心
关键词:
大叶落地生根;组氨醇脱氢酶(HDH);基因表达
摘  要:
组氨醇脱氢酶将组氨醇氧化成组氨酸,是组氨酸合成途径中的最后一步,调控植物的生长和发育过程。为了更好地理解大叶落地生根中胎生苗调控的分子机制,利用RACE-PCR技术从大叶落地生根中克隆了1个新的组氨醇脱氢酶基因KdHDH。该基因编码的蛋白质具有483个氨基酸残基,分子量为52 130,等电点为5.78,其开放阅读框长度为1 452 bp。KdHDH蛋白与葡萄、拟南芥、蓖麻等植物的蛋白相似性都很高,聚类分析结果表明该蛋白与甜菜和菠菜的遗传距离最近。实时荧光定量PCR分析结果表明,该蛋白基因在大叶落地生根的根中表达量最高,且受渗透胁迫(甘露醇)的诱导下调表达。
译  名:
Cloning and expression analysis of histidinol dehydrogenase(KdHDH) gene in Kalanchoe daigremontiana
作  者:
GE Yong-qiang;ZHANG Li-juan;DU Xiao-jiao;ZHU Min-qun;HUANG Hui-qing;LIANG Xiao-hong;ZHONG Tian-xiu;Shenzhen Risheng Landscape Company Limited;Shenzhen Tourism College of Ji'nan University;Turfgrass Research Institute,Beijing Forestry University;College of Forestry and Landscape Architecture,South China Agricultural University/Guangdong Engineering Research Center of Grassland Science;
关键词:
Kalanchoe daigremontiana;;histidinol dehydrogenase(HDH);;gene expression
摘  要:
Catalyzing histidinol to histidine by histidinol dehydrogenase(HDH)is the final step of his biosynthetic pathway,playing an important role in plant growth and development.To better understand the molecular mechanisms of plantlet formation involved in Kalanchoe daigremontiana,a KdHDH gene was identified using rapid amplification of cDNA end(RACE)PCR.KdHDH gene consists of an ORF of 1 452 bp that was predicted to encode a 483 amino acid residue-long protein of 52 130 with an isoelectric point of 5.78.KdH DH was related most closely to VvHDH,AtHDH and RcHDH,and phylogenetic analysis showed the closest genetic distance with BvHDH and SoHDH.Real-time PCR analysis revealed that KdHDH transcript was expressed highly in root and downregulated under osmotic stress.

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