Abiotic and biotic stress tolerance in wheat: the role of arbuscular mycorrhizal fungi

摘要: Rhizospheres of crop plants are complexes chemical and microbial interactions. Many produce allelochemicals, substances that inhibit growth other microorganisms. In previous research, colonization Echinacea purpurea by beneficial mycorrhizal fungi appeared to alleviate the effects allelochemicals on development medicinal herb. The overall aims work reported here were determine if arbuscular (AMF) alters responses common wheat (Triticum aestivum) stress caused abiotic factors [allelopathic two sorghum hosts (Sorghum bicolor a x Sudangrass hybrid)] biotic agents [bird-cherry oat aphid (Rhopalosiphum padi) (BCOA) Bipolaris species (Bs)] stress. all greenhouse experiments, seeds planted into each four treatments: 1) control (no-mycorrhizae, no-sorghum); 2) NM sorghum); 3) Gm (AMF, Gigaspora margarita, previously propagated 4) Gi Glomus intraradices, sorghum). Sorghum allelopathy was not alleviated AMF colonization. studies, had greater biomass (e.g., fresh shoot root weight) than in treatments. Furthermore, seedlings colonized with (either or treatments) different from grown after but without mycorrhizae (NM). natural insect infestations, less preferred R. padi non-mycorrhizal (NM) plants. However, choice nonchoice this preference found among Treatment no effect larval feeding behavior fall armyworm (Spodoptera frugiperda) leaves laboratory assays. chamber inoculation Bs disease rating seedlings. Our results indicate effective for (sorghum allelopathy) (herbivory BCOA reduction plant vigor Bs) stress; however variability studies high so further research is needed before their use these purposes dismissed.