稻瘟病诱导的抗病水稻和不抗病水稻氮素吸收差异研究  

Research on Rice Blast Induced Differences of Nitrogen Absorption in Blast Resistant and Non-resistant Rice Roots

作　　者：侯佩臣[1,2] 王成[1,2] 王晓冬[1,2] 王美娟[3] 于春花[1,2] 陈泉[1,2] 

机构地区：[1]北京农业智能装备技术研究中心,北京100097 [2]北京农业信息技术研究中心,北京100097 [3]北京林业大学生物科学与技术学院,北京100083

出　　处：《北方水稻》2013年第5期5-10,共6页North Rice

基　　金：国家重大科学仪器设备开发专项(项目编号:2011YQ080052);公益性行业(农业)科研专项(编号:201203026);北京市农林科学院科技创新能力建设专项(编号:KJCX201104010)

摘　　要：利用动态离子流检测技术对稻瘟病侵染的水稻根系NH4+和NO3-做了动态检测。发现抗病水稻在病害侵染时,根系对NH4+和NO3-具有很好的保持能力,而不抗病水稻根系对NH4+和NO3-的吸收能力明显下降,氮素含量测定也证实了不抗病水稻的氮素吸收减少,造成这种现象的原因可能是因为稻瘟病菌对不抗病水稻根系的NH4+和NO3-转运体直接或间接的起到了抑制作用。此外,在正常生长情况下两种水稻具有不同的NH4+和NO3-离子吸收特征,动态离子流检测技术对这种离子吸收特征的检测,为早期快速、无损筛选氮营养高效水稻品种提供了有效工具。Using scanning ion-selective electrode technique, we investigated the dynamic transport of NH4~ and NO3- on rice blast infected rice root. Results show that the root of disease resistant rice could maintain NI-I4~ and NO3- under disease infection, while the absorption capacity of NH4~ and NO3- decreased in nonresistant rice root. And the reduced nitrogen content confirmed that the absorption of nitrogen was reduced in nonresistant rice. We conclude that the transporters of NH4~ and NO3- might be inhibited directly or indirectly by rice blast in nonresistant rice. In addition, under normal growth conditions the two rice species have different NH4~ and NO3- absorption features, which provided an effective tool in indestructive early rapid screening rice with property of nitrogen utilization efficiency.

关 键 词：稻瘟病 离子流 铵态氮 硝态氮 

分 类 号：S143.1[农业科学—肥料学]