Competition between foliar Neotyphodium lolii endophytes and mycorrhizal Glomus spp. fungi in Lolium perenne depends on resource supply and host carbohydrate content

The Atrium, University of Guelph Institutional Repository

Competition between foliar Neotyphodium lolii endophytes and mycorrhizal Glomus spp. fungi in Lolium perenne depends on resource supply and host carbohydrate content

Show simple item record

dc.contributor.author Rasmussen, S
dc.contributor.author Newman, JA
dc.contributor.author Ryan, GD
dc.contributor.author Min, Y
dc.contributor.author Xue, H
dc.contributor.author Parsons, AJ
dc.contributor.author Liu, Q
dc.date.accessioned 2012-02-08T14:00:37Z
dc.date.available 2012-02-08T14:00:37Z
dc.date.issued 2011-04-08
dc.identifier.citation Liu, Q., Parsons, A.J., Xue, H., Min, Y., Ryan, G.D., Newman, J.A. and Rasmussen, S. "Competition between foliar Neotyphodium lolii endophytes and mycorrhizal Glomus spp. fungi in Lolium perenne depends on resource supply and host carbohydrate content." Functional Ecology 25.4 (2011): 910-920 en_US
dc.identifier.uri http://hdl.handle.net/10214/3316
dc.description.abstract 1. Cool-season grasses can be simultaneously infected by foliar fungal endophytes and colonised by mycorrhizal fungi, the integrated functions of which are strong predictors of plant fitness within grassland ecosystems. Evidence has been presented previously that infection of grass species with foliar endophytes can negatively affect mycorrhizal colonisation. Here, we tested the hypothesis that mycorrhizal colonisation in turn adversely affects Neotyphodium endophyte concentrations and that the competitive interaction between the two endosymbionts is affected by resource supply. 2. Specifically, we report how competition between Glomus (G. mosseae– GM, G. intraradices– GI) mycorrhizal fungi and N. lolii (common strain (CS) and AR1) foliar endophytic strains is affected by P supply and water-soluble carbohydrate (WSC) content in two Lolium perenne (perennial ryegrass) cultivars: a high sugar grass, AberDart, and a conventional (control) grass, Fennema. 3. The presence of Glomus mycorrhizae reduced the concentrations of endophytes and alkaloids in leaf blades and pseudostems. The reduction depended on P supply, ryegrass cultivar (notably WSC content) and endophyte strain. Conversely, foliar endophyte infection reduced mycorrhizal colonisation rates and concentrations in the roots of the control cultivar Fennema, although not in the high sugar cultivar, AberDart. 4. Neither GM nor N. lolii infection had an effect per se on the yield of root or blade compared with mycorrhiza-free (M-) and endophyte-free (E-) plants, respectively; though, yield of roots and blades was reduced by GI infection and at low P. 5.  Competitive interactions between ecologically widespread foliar endophytes (valuable for plant protection) and mycorrhizal endosymbionts (valuable for P acquisition) as seen in this study are of critical importance especially in areas of high pest prevalence and low P availability. Our work stresses the need for elucidating the physiological/metabolic basis for such interactions between endosymbionts to understand how these processes contribute to plant performance and fitness in grassland ecosystems. en_US
dc.language.iso en en_US
dc.publisher British Ecological Society en_US
dc.relation.ispartofseries Functional Ecology;DOI: 10.1111/j.1365-2435.2011.01853.x
dc.subject alkaloids; arbuscular mycorrhizal fungi; foliar endophytes; Glomus intraradices; Glomus mosseae; grassland ecosystems; high sugar grass; lolitrem B; peramine; perennial ryegrass en_US
dc.title Competition between foliar Neotyphodium lolii endophytes and mycorrhizal Glomus spp. fungi in Lolium perenne depends on resource supply and host carbohydrate content en_US
dc.type Article en_US


Files in this item

Files Size Format View Description
j.1365-2435.2011.01853.x-1.pdf 357.2Kb PDF View/Open Article

This item appears in the following Collection(s)

Show simple item record

Search the Atrium


Advanced Search

Browse

My Account