论文部分内容阅读
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。
In order to reveal the formation time effect of mycelium network and the role in regulating the interspecific relationship between AM fungi of different species, arbuscular mycorrhizal fungi were inoculated on alfalfa chamber in the donor chamber by using the chamber culture system The formation of mycelium network caused the changes of the biomass and P uptake rate of the plants, Dactylis glomerata and M. przewalskii. The results showed that mycorrhizal colonization was detected in both donor and recipient plants at 8 weeks after inoculation of donor mycorrhizal fungi, confirming the formation of a mycorrhizal network between donor and recipient plants . Recipient plants inoculated with Ge and Gv had the highest biomass (above and below ground), significantly higher than Gi. At 14 weeks, the infection rate of Gg (75.93%) and Bromus inermis (65.77%) were the highest or even higher than those of recipient alfalfa (Ms, 72.23%), And Ge had the highest donor biomass (0.42-0.63), which was significantly higher than that of blank treatment. Phosphorus content of the alfalfa plants (above and below ground) treated with 6G and Gm treatments was significantly (P <0.05) higher than that of blank treatment. This indicates that the formation of different strains of mycorrhizal fungi between plant roots has different time effects, while promoting plant growth and phosphorus uptake efficiency are not the same.