接种丛枝菌根真菌对小麦根内氮转运蛋白基因表达的影响
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国家自然科学基金项目(41201239);陕西省人才专项配套经费(201104050280);西北农林科技大学博士启动金项目(201104050279);国家小麦现代产业技术体系建设专项经费;教育部 “新世纪优秀人才支持计划”项目(NCET-08-0465);西北农林科技大学 “创新团队建设计划”。


Effect of inoculating different arbuscular mycorrhizal fungi on the expression of nitrogen transporter genes in roots of wheat
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    摘要:

    通过盆栽试验,研究了在低氮(不施氮)和高氮(施氮0.2 g·kg-1)水平下接种不同种类丛枝菌根(AM)真菌[Funneliformis mosseae(BGC-NM03D)、Claroideoglomus etunicatum(BGC-NM01B)和Rhizophagus intraradices(BJ09)]对小麦生长、氮吸收及根内4个硝态氮转运蛋白(NRT)基因、1个辅助蛋白(NAR)基因和2个铵态氮转运蛋白(AMT)基因表达的影响。结果表明,3种AM真菌均能够侵染小麦根系,以R. intraradices菌根的侵染率最高;接种R. intraradices或C. etunicatum能够显著提高小麦的生物量或地上部氮吸收量;无论是高氮还是低氮处理,接种AM真菌后均显著下调了小麦根内NRT、NAR和AMT基因的表达水平,且不同AM真菌调控小麦根内氮转运蛋白基因表达的能力具有明显差异。

    Abstract:

    A pot experiment was carried out to investigate the effects of inoculation of different arbuscular mycorrhizal(AM)fungi[Funneliformis mosseae (BGCNM03D),Claroideoglomus etunicatum(BGCNM01B),Rhizophagus intraradices(BJ09)]on growth,nitrogen uptake and expression of 5 nitrate transporter(NRT NAR)and 2 ammonium transporter(AMT)genes in roots of wheat under low N(no N application)and high N(N 0.2 g·kg1 soil)treatments.The results indicated that wheat roots were colonized by all the three AM fungi,and the fungus R.intraradices had the highest colonization rate in both N treatments.The inoculation of Rintraradices and Cetunicatum significantly increased shoot biomass or shoot N accumulation compared with the nonmycorrhizal control.The transcription levels of all the NRT and AMT genes in roots of wheat were downregulated by inoculating the AM fungi in both N treatments,and different AM fungi exhibited different abilities to regulated the expression of the NRT,NAR and AMT genes.

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段建锋,田慧,高亚军*.接种丛枝菌根真菌对小麦根内氮转运蛋白基因表达的影响[J].中国土壤与肥料,2016,(2):130-136.

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  • 收稿日期:2015-01-29
  • 最后修改日期:2015-05-04
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  • 在线发布日期: 2016-04-29
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