3种丛枝菌根真菌与3种寄主植物的共生关系  

Symbiosis between three arbuscular mycorrhizal fungi and three host plants

作　　者：祝英[1,2] 刘英霞[1] 巩晓芳[2] 陈应龙 任爱天[1] 刘润进[4] 金樑[5] 熊友才[1] 

机构地区：[1]兰州大学生命科学学院干旱农业生态研究所草地农业生态系统国家重点实验室,甘肃兰州730000 [2]甘肃省科学院生物研究所,甘肃兰州730000 [3]School of Earth and Environment,and UWA Institute of Agriculture,University of Western Australia,Perth WA 6009,Australia [4]青岛农业大学菌根生物技术研究所,山东青岛266109 [5]兰州大学草地农业科技学院草地农业生态系统国家重点实验室,甘肃兰州730020

出　　处：《微生物学通报》2016年第3期527-533,共7页Microbiology China

基　　金：科技部国际合作项目(No.2015DFG31840,2013DFA30950,2012DFG31450);国家自然科学基金项目(No.31570415);国家科技支撑计划项目(No.2012BAD14B10);国家星火计划项目(No.2012GA860003);甘肃省科学院青年基金项目(No.2013QN-03);甘肃省科学院应用开发研究项目(No.2012JK-03,2015JK-06)

摘　　要：【目的】利用丛枝菌根(Arbuscular mycorrhiza,AM)真菌对寄主植物的偏好性和不同寄主植物的功能互补作用,建立AM真菌的高效繁殖体系。【方法】以玉米(Zea may L.)、高粱[Sorghum bicolor(L.)Moench]和白车轴草(Trifolium repens L.)为寄主植物,采用寄主植物单作和间作的盆栽培养法,研究不同栽培模式对光壁无梗囊霉(Acaulospora laevis)、单孢球囊霉(Glomus monosporum)和根内球囊霉(G.intraradices)3种AM真菌繁殖能力的影响,通过地上部分生物量的分配分析,探索C3和C4植物对AM真菌共生关系的"功能互补"效应及机制。【结果】间作模式下,寄主植物地上部分总生物量和3种AM真菌的孢子密度均显著高于单作(P<0.05);单作和间作栽培模式下,3种AM真菌对玉米地上部分生物量响应无显著差异(P>0.05),但单孢球囊霉和根内球囊霉对高粱地上部分生物量产生显著影响(P<0.05);两种间作栽培模式下,根内球囊霉对白车轴草地上部分生物量也产生了显著影响(P<0.05)。【结论】3种AM真菌对3种寄主植物的共生偏好性不同,且C3和C4植物对AM真菌共生关系存在一定的"功能互补"效应,利用AM真菌的寄主植物偏好性和不同植物间的功能互补关系,增加AM真菌的孢子产量,有利于AM真菌高效繁殖体系的建立。[Objective] In order to establish an efficient arbuscular mycorrhiza（AM） fungi propagation system, three AM fungi were selected to test their compatibility with three different host plants and the effects of planting modes on fungal propagation. [Methods] Three selected AM fungi（Acaulospora laevis, Glomus monosporum and G. intraradices） were used to inoculate three crop species, namely maize（Zea may L., C4 broad-leaf plant）, sorghum（Sorghum bicolor（L.） Moench, C4 narrow-leaf plant） and white clover（Trifolium repens L., C3 plant）. The three crops were planted as intercropping or monocropping modes. [Results] The aboveground biomasses of the host plants and their rhizosphere AM fungi spore density in the intercropping mode of the three crop species were significantly higher than those in monocropping mode, respectively（P〈0.05）. The aboveground biomass of maize was not significantly affected by the AM fungal species regardless planting modes（P〉0.05）, while reduced aboveground biomass was observed in sorghum under intercropping mode inoculated with G. monosporum or G. intraradices, respectively（P〈0.05）. The aboveground biomass of intercropped white clover was significantly improved by the inoculation of G. intraradices（P〉0.05）. [Conclusion] Our studies suggest that host preference of the three AM fungi and their host plants exists, and the possible so-called ＂symbiotic complementary functions＂ between the tested C3 and C4 plants to AM fungi could be used for AM fungi propagation and their potential applications in crop production.

关 键 词：寄主植物 AM真菌 间作 单作 共生机制 

分 类 号：Q948.122.3[生物学—植物学]