Neotyphodium属禾草内生真菌和球囊霉属菌根真菌对野大麦生长的影响  

Effects of Neotyphodium endophyte and AMF on Hordeum brevisubulatum growth

作　　者：方爱国[1] 李春杰[1] 

机构地区：[1]草地农业系统国家重点实验室兰州大学草地农业科技学院,甘肃兰州730000

出　　处：《草业科学》2014年第3期457-461,共5页Pratacultural Science

基　　金：国家"973"项目(2014CB138702);国家自然科学基金项目(31372366)

摘　　要：禾草内生真菌提高宿主对生物及非生物胁迫抗性的同时也促进植物生长,丛枝菌根真菌促进植物根系对营养元素尤其是磷的吸收和贮存,野大麦(Hordeum brevisubulatum)中同时存在这两种共生体。本研究比较了温室条件下这两种共生体共存及单独存在时对野大麦生长的影响和其相互作用。结果表明,内生真菌可抑制丛枝菌根真菌的侵染;内生真菌和菌根真菌均可显著增加野大麦地上生物量,菌根真菌可显著增加其地下生物量。二者共存时野大麦的全N含量显著小于单个共生体的处理;仅带菌根的野大麦P含量显著大于二者共存时的处理,内生真菌通过对菌根真菌的抑制降低了野大麦对P的吸收和积累。Neotyphodium/Epichloё endophytes not only enhance plant resistance to biotic and abiotic stress, but also have the positive effect on the growth of the host grass. Arbuscular Mycorrhizal Fungi （AMF） can improve plant mineral nutrition especially P uptake and storage. We found that both Neotyphodium endophyte and AMF coexisted in Hordeum brevisubulatum. In this study, endophyte-infected （E＋） and endophyte-free （E-）, and AMF-infected （M＋） and AMF-free （M-） H.brevisubulatum was established for this study. The results demonstrated that AMF colonization was significantly inhibited by the grass endophyte. The above-ground biomass of H.brevisubulatum was significantly increased by endophytes, while the root biomass was significantly increased by AMF. The content of total N for plant infected endophyte or AMF alone was significantly higher than both fungi infected. The effect of P accumulation caused by AMF was inhibited by grass endophyte.

关 键 词：禾草内生真菌 丛枝菌根真菌 野大麦 互作 

分 类 号：S512.3[农业科学—作物学]