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作物学报 ›› 2017, Vol. 43 ›› Issue (09): 1272-1279.doi: 10.3724/SP.J.1006.2017.01272

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

矮秆基因Rht_NM9在小麦株高建成中对内源激素含量的影响

卢媛1,2,崔超凡2,胡平2,陈佩度2,沈雪芳1,韩晴1,王义发1,邢莉萍2,*,曹爱忠2,*   

  1. 1上海市农业科学院作物育种栽培研究所,上海 201403;2南京农业大学作物遗传与种质创新国家重点实验室 / 细胞遗传研究所 / 江苏省现代作物生产协同创新中心,江苏南京 210095
  • 收稿日期:2016-12-16 修回日期:2017-05-10 出版日期:2017-09-12 网络出版日期:2017-06-05
  • 通讯作者: 邢莉萍, E-mail: xingliping@njau.du.cn; 曹爱忠, E-mail: caoaz@njau.edu.cn
  • 基金资助:

    本研究由中央高校基本科研业务费专项(KYZ201601, KYYJ201602, KYZ201401)资助。

Effects of Dwarf Gene Rht_NM9 on Contents of Endogenous Hormone RegulatingPlant Height of Common Wheat

LU Yuan1,2,CUI Chao-Fan2,HU Ping2,CHEN Pei-Du2,SHEN Xue-Fang1,HAN Qing1,WANG Yi-Fa1,XING Li-Ping2,*,CAO Ai-Zhong2,*   

  1. 1 Crop Breeding and Cultivation Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; 2 State Key Laboratory of Crop Genetics and Germplasm Enhancement / Cytogenetics Institute, Nanjing Agricultural University/ Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing 210095, China
  • Received:2016-12-16 Revised:2017-05-10 Published:2017-09-12 Published online:2017-06-05
  • Contact: xing liping, E-mail: xingliping@njau.du.cn; Cao aizhong, E-mail: caoaz@njau.edu.cn
  • Supported by:

    This study was supported by the Fundamental Research Funds for the Central Universities (KYZ201601, KYYJ201602, KYZ201401).

摘要:

普通小麦品种“南农9918”经甲基磺酸乙酯(ethyl methanesulfonate, EMS)诱变获得一个矮秆、多蘖、长穗突变体“NM9”,在该突变体中定位到一个新的矮秆突变基因Rht_NM9。内源激素在普通小麦株高建成的过程中发挥重要的调节作用,为了解析Rht_NM9致矮的生理机制,本研究以南农9918及其矮秆突变体NM9为材料,利用酶联免疫吸附分析法(enzyme-linked immunosorbent assays, ELISA)测定了不同生育期各节间内源赤霉素(GA)、生长素(IAA)、脱落酸(ABA)和玉米素核苷(ZR)的含量,分析小麦发育关键时期的内源激素含量变化与株高的关系。结果表明,在孕穗期和抽穗期,矮秆突变体NM9中GA、ABA含量均显著高于南农9918,而ZR含量则显著低于南农9918,IAA含量在南农9918和突变体NM9之间无明显差异。此外,突变体NM9各节间中GA/ABA比值显著高于南农9918,而IAA/ABA、(IAA+GA)/ABA、ZR/ABA比值显著低于南农9918。以上结果表明小麦株高受多种激素调控,突变体中内源ABA含量升高,IAA/ABA和ZR/ABA比值降低会抑制植物株高伸长。

关键词: 小麦, 株高, 突变体, 内源激素

Abstract:

A dwarf wheat mutant (NM9) with additional tillers and elongated spikes was obtained by treating NAU9918 seeds with ethyl methanesulfonate (EMS). The decreased plant height in NM9 was controlled by a novel dwarf gene Rht_NM9. The endogenous plant hormones play importantroles inregulating plant height of common wheat. To understand the dwarfing mechanism of Rht_NM9 and the relationship between endogenous hormone contents and plant height, measured contents of endogenous gibberellic acid (GA), auxin (IAA), abscisic acid (ABA) and zeatin riboside (ZR) in internodes of NM9 and NAU9918 at different stagesby enzyme-linked immunosorbent assays (ELISA). Our study indicated that contents of GA and ABA in NM9 were significantly higher than there in NAU9918, and ZR content in NM9 was significantly lower than that inNAU9918 atboth booting and heading stages. Nevertheless, no difference of IAA content was observed between the mutant and the wild-type. In addition,the GA/ABA ratio in internodes of the mutant was significantly higher than that of the wild-type, however, the ratios of IAA/ABA, (IAA + GA)/ABA and ZR/ABA weresignificantly lower than thereof the wild-type. All these results indicated that plant height in wheat was regulated by multiple hormones. Plant height would be inhibited with increasingcontent of endogenous ABA and decreasingratios of IAA/ABA and ZR/ABA in wheat.

Key words: Wheat, Plant height, Mutant, Endogenous hormones

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