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The effects of fungal root endophytes on plant growth: a meta-analysis

Content Provider	Springer Nature Link
Author	Mayerhofer, Michael S. Kernaghan, Gavin Harper, Karen A.
Copyright Year	2012
Abstract	Fungal root endophytes are plant associates that colonize root tissue internally without causing any obvious harm to their host. Although ubiquitous, this relationship is not well understood. Our objectives were to determine the effects of fungal root endophyte inoculation on plant biomass and nitrogen concentration by conducting an extensive meta-analysis. We also explored the effects of experimental conditions on the host–endophyte relationship. We performed analyses weighted with non-parametric variance on plant response to root endophytes from the Ascomycetes (excluding the Clavacipitaceae), including categorical analyses of 21 experimental factors, ranging from the identity of the host and the endophyte, to the composition of the growing medium. The response of total biomass to endophyte inoculation was 18 % lower than non-inoculated controls, while individually, root biomass, shoot biomass, and nitrogen concentration responses to endophyte inoculation were neutral. The identities of both the host and the endophyte had an influence, as did the original source of the endophyte (whether or not the isolate used originated from the same host species). Experimental conditions also influenced the plant–endophyte relationship, with the most important being the availability and sources of carbon and organic nitrogen, particularly peat moss. Although our analysis demonstrates that overall plant biomass and nitrogen concentration responses to ascomycetous root endophyte inoculation is neutral to negative, these results are somewhat confounded by among-study differences in experimental conditions, which undoubtedly contribute to the high levels of variability in plant response seen in the literature.
Starting Page	119
Ending Page	128
Page Count	10
File Format	PDF
ISSN	09406360
Journal	Mycorrhiza
Volume Number	23
Issue Number	2
e-ISSN	14321890
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fungi Endophytes Dark septate endophytes Host–fungus interactions Helotiales Phialocephala fortinii Microbiology Plant Sciences Ecology Agriculture Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Molecular Biology Ecology, Evolution, Behavior and Systematics

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