丛枝菌根真菌根外菌丝形成时间及对牧草的促生长效应  

Colonization time of different species of hyphal network and their effect on the growth of two forage grasses

作　　者：吕艳萍[1] 任爱天[1] 鲁为华[1] 夏金平[2] 娜丽克斯.外里 杨洁晶[1] 

机构地区：[1]石河子大学动物科技学院,新疆石河子832003 [2]新疆生产建设兵团第八师147团,新疆石河子832045

出　　处：《石河子大学学报（自然科学版）》2016年第1期41-45,共5页Journal of Shihezi University(Natural Science)

基　　金：新疆兵团博士资金专项(2012BB017);国家牧草产业技术体系项目(CARS-35);石河子大学高层次引进项目(RCZX201022);石河子大学科技服务项目(4004103)

摘　　要：为了揭示不同物种间接种AM真菌后菌丝网络的形成时间效应以及在调节植物种间关系中所起的作用,采用分室培养系统法对供体室的紫花苜蓿接种丛枝菌根真菌,进而研究菌丝网络形成时间引起受体室鸭茅和无芒雀麦的生物量及磷吸收率的变化。结果显示:供体植物接种菌根真菌后,植物生长第8周时,在供体和受体植物根系均检测到菌根侵染,证实供体和受体植物间形成了根间菌丝网络。接种Ge和Gv的受体植物生物量(地上、地下)最大,显著高于Gi。第14周时,接种Gi和Gm的受体鸭茅(Dg,75.93%)和无芒雀麦(Bi,65.77%)侵染率最大甚至高于受体苜蓿(Ms,72.23%),接种Gm和Ge的供体生物量最大(0.42-0.63),显著高于空白处理。接种6G和Gm处理的供体苜蓿植株(地上、地下)磷含量显著(P<0.05),高于空白处理。这表明植物根系之间不同菌种菌丝网络的形成具有不同的时间效应,同时促进植株生长及磷素吸收效率也不尽相同。The objectives of this experiment were to measure temporal changes in the colonization rate of two forage grasses by different species of Arbuscular mycorrhizal（AM） fungi and to determine how the AM fungi affected the growth of the grasses. In the present study, we used the culture chamber box method with AM- colonized alfalfa as donor plants and Dactylis glomerata（Dg） and Bromus inermis Leyss（Bi） as receiver plants. The time that was required to form a hyphal network was measured as well as the effects of the AM fungi on the biomass and phosphorus uptake rate by the receiver plants. The results showed that after 8 weeks inoculation, AM fungi were detected in both the donor and the receiver plants, which has confirmed that a hyphal network had formed between the donor and the receiver plants. Above- and below- ground biomass of receiver plants was significantly greater in the Glomus etunicatum and Glomus versiforme treatments than that in the CK treatment.After 14 weeks,the Glomus intraradices and Glomus mosseae infection rates in the receiver plants（D.glomerata, 75.93%; B.inermis, 65.77%）were similar to those in the donor plants（Ms,72.23%）. Shoot and root phosphorus concentrations were significant greater in the 6G and Glomus mossege treatments than in the CK treatment. In conclusion, the amount of time required to form a hyphal network between the donor and receiver plants varied depending on the AM species. Furthermore, AM colonization can promote growth of forage grasses and their phosphorus uptake efficiency.

关 键 词：菌根真菌 菌丝网络 生物量 磷含量 

分 类 号：Q948.122.3[生物学—植物学]