Journal
PLANT ECOLOGY
Volume 200, Issue 2, Pages 161-165Publisher
SPRINGER
DOI: 10.1007/s11258-008-9443-9
Keywords
Intraspecific variation; Phenotypic variation; Thelephora terrestris
Categories
Funding
- Fonds quebecois de la recherche sur la nature et les technologies
- NSERC Discovery
- BC Forest Science Program
- British Columbia Ministry of Forests
- Research Branch
- Kalamalka Forestry Center
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Across different host plant species, the effects of mycorrhizal colonization on host growth parameters can vary, but intraspecific variation in this relationship has rarely been measured. We tested the direction and consistency of the relationship between ectomycorrhizal colonization level and growth responses across seed families of Pinus contorta var. latifolia. Root tips of seedlings from eight full sib seed families varied in levels of ectomycorrhizal fungal colonization from 39% to 100%. We observed positive, negative, or neutral relationships between colonization level and shoot mass, depending on plant family. For the majority of seed families no relationship was observed between colonization level and root mass; however, two seed families showed negative relationships. Shoot height differed only by seed family. Results from our study indicate that the relationship between colonization level and host growth depends on host genotype. We suggest that models of plant intraspecific interactions should consider ectomycorrhizal associations when assessing phenotypic variability.
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