Abstract
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.

Explore related subjects
Discover the latest articles and news from researchers in related subjects, suggested using machine learning.References
Burgess T, Malajczuk N (1989) The effect of ectomycorrhizal fungi on reducing the variation of seedling growth of Eucalyptus globulus. Agric Ecosyst Environ 28:41–46. doi:10.1016/0167-8809(90)90010-B
Cline ML, Reid CPP (1982) Seed source and mycorrhizal fungus effects on growth of containerized Pinus contorta and Pinus ponderosa seedlings. For Sci 28:237–250
Crutsinger GM, Collins MD, Fordyce JA et al (2006) Plant genotypic diversity predicts community structure and governs an ecosystem process. Science 313:966–968. doi:10.1126/science.1128326
Díaz S, Cabido M (2001) Vive la différence: plant functional diversity matters to ecosystem processes. Trends Ecol Evol 16:646–655. doi:10.1016/S0169-5347(01)02283-2
Dickie IA, Koide RT, Steiner KC (2002) Influences of established trees on mycorrhizas, nutrition, and growth of Quercus rubra seedlings. Ecol Monogr 72:505–521
Hughes AR, Stachowicz JJ (2004) Genetic diversity enhances the resistance of a seagrass ecosystem to disturbance. Proc Natl Acad Sci USA 101:8998–9002. doi:10.1073/pnas.0402642101
Jones MD, Durall DM, Tinker DM (1990) Phosphorus relationships and production of extramatrical hyphae by 2 types of willow ectomycorrhizas at different soil-phosphorous levels. New Phytol 15:259–267. doi:10.1111/j.1469-8137.1990.tb00451.x
Karst J, Marczak L, Jones MD et al (2007) The mutualism-parasitism continuum in ectomycorrhizas: a quantitative assessment using meta-analysis. Ecology 89(4):1032–1042
Pelham J, Mason PA (1978) Aseptic cultivation of sapling trees for studies of nutrient responses with particular reference to phosphate. Ann Appl Biol 88:415–419. doi:10.1111/j.1744-7348.1978.tb00733.x
Rosado SCS, Kropp BR, Piché Y (1994) Genetics of ectomycorrhizal symbiosis. I. Host plant variability and heritability of ectomycorrhizal and root traits. New Phytol 126:105–110. doi:10.1111/j.1469-8137.1994.tb07535.x
Sall J, Creighton L, Lehman A (2005) A guide to statistics and data analysis using JMP and JMP IN software, 3rd edn. SAS Institute Inc., Canada
Tagu D, Rampant PF, Lapeyrie F et al (2001) Variation in the ability to form ectomycorrhizas in the F1 progeny of an interspecific poplar (Populus spp.) cross. Mycorrhiza 10:237–240. doi:10.1007/PL00009997
Tagu D, Bastien C, Faivre-Rampant P et al (2005) Genetic analysis of phenotypic variation for ectomycorrhiza formation in interspecific F1 poplar full-sib family. Mycorrhiza 15:87–91. doi:10.1007/s00572-004-0302-9
Teste F, Karst J, Jones MD et al (2006) Methods to control ectomycorrhizal colonization: effectiveness of chemical and physical barriers. Mycorrhiza 17:51–65. doi:10.1007/s00572-006-0083-4
Thompson BD, Grave TS, Malajczuk N et al (1994) The effectiveness of ectomycorrhizal fungi in increasing the growth of Eucalyptus globulus Labil. in relation to root colonization and hyphal development in soil. New Phytol 126:517–524. doi:10.1111/j.1469-8137.1994.tb04250.x
Acknowledgments
Financial support was provided by a scholarship to J.K. from le Fonds québécois de la recherché sur la nature et les technologies and funding from an NSERC Discovery Grant and BC Forest Science Program Grant to M.J. and NSERC Discovery Grant to R.T. We are grateful to Aaron Patterson who provided technical assistance in the greenhouse and to Michael Carlson of British Columbia Ministry of Forests, Research Branch, Kalamalka Forestry Center, who generously provided seeds for the experiment. Thoughtful discussions with Sally Aitken and Suzanne Simard greatly improved the design of this experiment and Jason Hoeksema provided insightful feedback on the manuscript.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Karst, J., Jones, M.D. & Turkington, R. Ectomycorrhizal colonization and intraspecific variation in growth responses of lodgepole pine. Plant Ecol 200, 161–165 (2009). https://doi.org/10.1007/s11258-008-9443-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11258-008-9443-9
Keywords
Profiles
- Melanie D. Jones View author profile