稻瘟病菌诱导的感病和抗病水稻品种根系离子吸收变化研究  

Research on Magnaporthe oryzae Induced Alternations of Ion Absorption in Roots of Susceptible and Resistant Rice Varieties

作　　者：侯佩臣[1] 王成[1] 王晓冬[1] 王美娟[2] 朱大洲[1] 高权[1] 

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

出　　处：《中国水稻科学》2014年第6期659-664,共6页Chinese Journal of Rice Science

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

摘　　要：利用动态离子流检测技术分析稻瘟病菌侵染条件下感病和抗病水稻品种根系离子吸收规律,以探讨稻瘟病菌对水稻营养吸收的影响。研究发现感病水稻品种病症较明显,根系对K+吸收减少,H+由外流转为内流,Ca2+吸收减少且呈现不稳定吸收特征;抗病水稻品种病症较轻,根系对K+、H+、Ca2+吸收仅表现小幅下降。结果表明,在稻瘟病菌侵染后,抗病水稻品种仍保持较强的离子吸收能力,而感病水稻品种的离子吸收能力明显减弱,甚至出现离子流失。这可能是导致感病水稻品种根系营养吸收障碍的重要原因。The dynamic ion flux test technique was employed to analyze ion absorption by roots in susceptible and resistant rice varieties subjected to Magnaporthe oryzae infection,aiming to determine the effect of Magnaporthe oryzae infection on nutrient absorption in rice plants.The results showed that Magnaporthe oryzae infection caused more obvious disease symptom in susceptible variety and reduced K＋ absorption,led to H ＋ transition from efflux to influx,and reduced Ca2 ＋ absorption with larger unstability in root.In contrast,the resistant rice variety showed moderate disease severity and was characterized by only a slight decrease in absorption of K＋ ,H ＋ ,and Ca2 ＋ ions by the roots.These results indicated that subjected to Magnaporthe oryzae infection,resistant rice variety showed stronger ion absorption capacity,while the susceptible rice variety exhibited weaker capacity,which could be an important reason leading to the barrier of nutrients absorption in the roots of susceptible rice variety.

关 键 词：稻瘟病 动态离子流检测技术 钾离子 钙离子 氢离子 

分 类 号：S435.111.41[农业科学—农业昆虫与害虫防治]