生物技术通报 ›› 2020, Vol. 36 ›› Issue (6): 46-53.doi: 10.13560/j.cnki.biotech.bull.1985.2019-1170

• 研究报告 • 上一篇    下一篇

葡萄ERECTA基因过表达提高拟南芥生长量和耐热性

刘敏1, 房玉林2,3   

  1. 1. 山西农业大学食品科学与工程学院,太谷 030801;
    2. 西北农林科技大学葡萄酒学院,杨凌 712100;
    3. 陕西省葡萄与葡萄酒工程技术研究中心,杨凌 712100
  • 收稿日期:2019-12-03 出版日期:2020-06-26 发布日期:2020-06-28
  • 作者简介:刘敏,女,博士,讲师,研究方向:葡萄逆境生理;E-mail:liumin272@163.com
  • 基金资助:
    国家现代农业(葡萄)产业技术体系建设专项资助项目(CARS-29-zp-06),山西农业大学科技创新基金项目(2018YJ53),山西省优秀博士来晋工作奖励资金科研项目(SXYBKY2019002)

Overexpression of Grape ERECTA Enhances Growth and Thermo-tolerance of Arabidopsis

LIU Min1, FANG Yu-lin2,3   

  1. 1. College of Food Science and Engineering,Shanxi Agricultural University,Taigu 030801;
    2. College of Enology,Northwest A & F University,Yangling 712100;
    3. Shaanxi Engineering Research Center for Viti-Viniculture,Yangling 712100
  • Received:2019-12-03 Published:2020-06-26 Online:2020-06-28

摘要: 葡萄ERECTA基因受高温诱导表达,且在葡萄的幼叶和花中表达量较高。为了研究葡萄ERECTA基因在植物生长发育和高温响应中的作用,将该基因在拟南芥中过表达,观察其表型变化和对高温的耐受性。结果表明,葡萄ERECTA基因过表达可以显著增加拟南芥叶片的长度、宽度和数量,花梗变细长,角果长度和株高显著增加。将拟南芥种子在高温处理后常温培养2 d,大部分Landsberg erecta(Ler)幼苗发育不正常,而过表达型ER-OE幼苗均未受到高温胁迫的影响。拟南芥植株在40℃高温处理4 d,ER-OE植株受胁迫程度较轻,叶片电导率的顺序为Ler>Col>ER-OE;在22℃恢复5 d后,Col、Ler和ER-OE的存活率分别为33%、12%和83%。ERECTA基因既可以提高植株的耐热性,又可以增加生长量,为培育葡萄抗性新品种提供了新的基因资源,在农业生产上有很好的应用前景。

关键词: 葡萄, ERECTA, 生长发育, 高温, 耐热性

Abstract: ERECTA gene expression in grape is induced by high temperature,and its expression level is high in young leaves and flowers. In order to study the role of grape ERECTA gene in plant growth/development and the response to high temperature,this gene was overexpressed in Arabidopsis,and its phenotype and thermo-tolerance were observed. The results showed that in the ERECTA-overexpressed Arabidopsis,the length,width and number of leaves increased,the pedicel became elongated,and pod length and plant height also increased significantly. Arabidopsis seeds were cultured at room temperature for 2 d after heat treatment. It was found that most Landsberg erecta(Ler)seedlings did not develop normally,while overexpressed seedlings ER-OE were not affected by heat stress. After Arabidopsis plants were treated at 40℃ for 4 d,ER-OE plants were subjected to little heat damage. The electrolyte leakage of leaves was Ler>Col>ER-OE. After recovery at 22℃for 5 d,the survival rate of Col,Ler and ER-OE was 33%,12% and 83%,respectively. ERECTA can not only improve the heat resistance of plants,but also increase the growth amount,which provides a new genetic resource for breeding new resistant varieties of grape,and has a promising application prospect in agricultural production.

Key words: grape, ERECTA, growth and development, high temperature, thermo-tolerance