中国农业科技导报 ›› 2019, Vol. 21 ›› Issue (2): 26-33.DOI: 10.13304/j.nykjdb.2018.0173

• 生物技术 生命科学 • 上一篇    下一篇

钙依赖性蛋白激酶34在小麦籽粒淀粉合成的功能

徐梦军,高天,王鹏飞,李鸽子,康国章*   

  1. 河南农业大学农学院, 国家小麦工程技术研究中心, 郑州 450002
  • 收稿日期:2018-03-21 出版日期:2019-01-15 发布日期:2018-05-02
  • 通讯作者: *通信作者:康国章,研究员,博士生导师,主要从事小麦淀粉合成生理与分子机制研究。E-mail:guozhangkang@henau.edu.cn
  • 作者简介:徐梦军,硕士研究生,主要从事小麦分子生理研究。E-mail:mengjunxu920304@henau.edu.cn。
  • 基金资助:
    国家自然科学基金项目(U1704110和31571575);河南省科技创新人才计划项目(174100510002);河南高校科技创新人才支持计划项目(15HASIT029)资助。

Function of Calcium Dependent Protein Kinase 34 in Grain Starch Synthesis of Wheat (Triticum aestivum L.)

XU Mengjun, GAO Tian, WANG Pengfei, LI Gezi, KANG Guozhang*   

  1. National Engineering Research Center for Wheat, Agronomy Institute, Henan Agricultural University, Zhengzhou 450002, China
  • Received:2018-03-21 Online:2019-01-15 Published:2018-05-02

摘要: 钙依赖性蛋白激酶在调控植物发育与物质合成中发挥重要功能。为探讨一个钙依赖性蛋白激酶-TaCPK34在小麦淀粉合成中的功能,利用大麦条纹花叶病介导的基因沉默技术(barley stripe mosaic virus-virus induced gene-silencing, BSMV-VIGS)将该基因沉默,并在田间条件下测定灌浆期间沉默植株籽粒内TaCPK34基因的表达量及成熟籽粒的淀粉性状。结果表明,在花后15 d、20 d、26 d和30 d,BSMV-VIGS-TaCPK34沉默植株中TaCPK34基因表达量受到显著抑制(63.8%~97.8%);BSMV-VIGS-TaCPK34沉默植株成熟籽粒淀粉含量、千粒重、粒长和粒宽均显著降低(降幅分别为6.0%、7.1%、4.4%和11.0%);扫描电镜观察发现BSMV-VIGS-TaCPK34 沉默植株成熟籽粒内淀粉粒排列疏松且数量减少。这些研究结果表明TaCPK34在小麦籽粒灌浆期间对籽粒淀粉的合成有重要影响。

关键词: 小麦, 淀粉合成, 钙依赖性蛋白激酶, 大麦条纹花叶病介导的基因沉默

Abstract: Calcium-dependent protein kinases play important roles in regulating growth, development and biological synthesis in higher plants. In this study, the function of a wheat calcium-dependent protein kinase, TaCPK34, in regulating the starch synthesis was identified using the barley stripe mosaic virus-virus induced gene-silencing (BSMV-VIGS) technique under field conditions. Our data indicated that expression levels of TaCPK34 gene in BSMV-TaCPK34-infected wheat plants were significantly inhibited by 63.8%~97.8% compared to those in BSMV-GFP-infected wheat plants (negative control) at 15 d, 20 d, 26 d and 30 d after virus inoculation. Starch content, and grain weight, grain length and width in BSMV-TaCPK34-infected wheat plants were also decreased significantly. Scanning electron microscope observation showed that morphology and number of starch granules in grains of BSMV-TaCPK34-infected wheat plants became looser and fewer compared to those of BSMV-GFP-infected wheat plants. These suggested that TaCPK34 could function in regulating starch synthesis of wheat.

Key words: Triticum aestivum L., starch synthesis, calcium dependent protein kinase, BSMV-VIGS