Plant-mediated partner discrimination in ectomycorrhizal mutualisms

Bogar, Laura; Peay, Kabir; Kornfeld, Ari; Huggins, Julia; Hortal, Sara; Anderson, Ian; Kennedy, Peter

doi:10.1007/s00572-018-00879-7

Plant-mediated partner discrimination in ectomycorrhizal mutualisms

Journal Article · Mon Jan 07 04:00:00 EST 2019 · Mycorrhiza

DOI:https://doi.org/10.1007/s00572-018-00879-7· OSTI ID:1844246

^[1]; Peay, Kabir ^[2]; Kornfeld, Ari ^[3]; Huggins, Julia ^[4]; Hortal, Sara ^[5]; Anderson, Ian ^[5]; Kennedy, Peter ^[4]

Stanford Univ., CA (United States); Stanford University
Stanford Univ., CA (United States)
Carnegie Institution for Science, Stanford, CA (United States)
Univ. of Minnesota, Minneapolis, MN (United States)
Western Sydney Univ., Penrith (Australia)

Although ectomycorrhizal fungi have well recognized effects on ecological processes ranging from plant community dynamics to carbon cycling rates, it is unclear how actively plants are able to influence the structure of these fungal communities. To address this knowledge gap, we performed two complementary experiments to determine 1) whether ectomycorrhizal plants can discriminate among potential fungal partners, and 2) to what extent the plants might reward better mutualists. In experiment 1, split-root Larix occidentalis seedlings were inoculated with spores from three Suillus species (S. clintonianus, S. grisellus, and S. spectabilis). In experiment 2, we manipulated the symbiotic quality of Suillus brevipes isolates on split-root Pinus muricata seedlings by changing the nitrogen resources available, and used carbon-13 labeling to track host investment in fungi. In experiment 1, we found that hosts can discriminate in multi-species settings. The split-root seedlings inhibited colonization by S. spectabilis whenever another fungus was available, despite similar benefits from all three fungi. In experiment 2, we found that roots and fungi with greater nitrogen supplies received more plant carbon. Furthermore, our results suggest that plants may be able to regulate this symbiosis at a relatively fine scale, and that this regulation can be integrated across spatially separated portions of a root system.

View Accepted Manuscript (DOE)

Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: SC0016097

OSTI ID:: 1844246

Journal Information:: Mycorrhiza, Journal Name: Mycorrhiza Journal Issue: 2 Vol. 29; ISSN 0940-6360

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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59 BASIC BIOLOGICAL SCIENCES
Ectomycorrhiza
Larix occidentalis
Partner choice
Pinus muricata
Stable isotope enrichment
Suillus

Plant-mediated partner discrimination in ectomycorrhizal mutualisms

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