巴西橡胶树伤害诱导蛋白基因的克隆及表达分析  

Cloning and Expression Analysis of the Wound-induced Protein Gene in Hevea brasiliensis

作　　者：刘向红[1,2] 邓治[2] 李德军[2] 

机构地区：[1]海南大学农学院,海口570228 [2]中国热带农业科学院橡胶研究所农业部橡胶树生物学重点开放实验室,海南儋州571737

出　　处：《中国农学通报》2012年第16期47-52,共6页Chinese Agricultural Science Bulletin

基　　金：中国热带农业科学院橡胶研究所基本科研业务费专项"橡胶树死皮发生关键基因HbTCTP功能研究"(1630022011024);农业部橡胶树生物学重点开放实验室/省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室开放课题基金项目"橡胶树死皮相关基因内含子长度多态性标记开发及应用"(KLOF1103)

摘　　要：为了研究橡胶树在逆境胁迫下的分子机制,根据巴西橡胶树抑制消减(SSH)文库和NCBI数据库中的伤害诱导蛋白基因拼接序列设计嵌套引物,通过RACE技术获得基因的完整开放阅读框,命名为HbWUN1。序列分析表明HbWUN1长872bp,含有390bp的开放阅读框,编码129个氨基酸。生物信息学分析结果表明HbWUN1不含信号肽和跨膜结构,为亲水性蛋白。进化分析结果显示,橡胶树HbWUN1与拟南芥NP_974279.1聚成一类。RT-PCR分析结果表明HbWUN1表达无组织特异性,在胶乳中表达量最高。在叶片不同发育时期HbWUN1表达存在变化,在衰老期最高。此外,低温、伤害、高盐、乙烯和茉莉酸处理均调控HbWUN1表达,推测其可能在橡胶树逆境反应中发挥作用。The aim was to study the molecular mechanism of rubber tree in stress response. The first wound-induced protein gene in Hevea brasiliensis designated as HbWUN1, was isolated according to assembled sequences of two ESTs （GenBank： GO349116 and EC607122）. The complete cDNA of HbWUN1 was 872 bp in size with a 390 bp ORF encoding 129 amino acid. As a predicted hydrophilic protein, no signal peptides and transmembrane structures were predicted within HbWUN1. The phylogenetic analysis indicated that HbWUN1 was clustered together with Arabidopsis thaliana （NP_974279.1）. The expression pattern of HbWUN1 was no tissue-specific with high expression in latex. In different developing stages of rubber tree leaves, HbWUN1 showed a variation expression profile and reached the highest level at senescence stage. In addition, low temperature, wounding, high salt, ET and JA treatments regulated the expression of HbWUN1, suggesting that HbWUN1 might play vital roles in stress response of rubber tree.

关 键 词：橡胶树 伤害诱导蛋白 表达模式 HbWUN1 基因 

分 类 号：S794.1[农业科学—林木遗传育种]