Heterogeneity in inoculum potential and effectiveness of arbuscular mycorrhizal fungi

Lovelock, Catherine E. and Miller, Rebecca (2002) Heterogeneity in inoculum potential and effectiveness of arbuscular mycorrhizal fungi. Ecology, 83 3: 823-832. doi:10.2307/3071884

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Author Lovelock, Catherine E.
Miller, Rebecca
Title Heterogeneity in inoculum potential and effectiveness of arbuscular mycorrhizal fungi
Journal name Ecology   Check publisher's open access policy
ISSN 0012-9658
Publication date 2002-03
Sub-type Article (original research)
DOI 10.2307/3071884
Open Access Status File (Publisher version)
Volume 83
Issue 3
Start page 823
End page 832
Total pages 10
Place of publication Washington, DC, United States
Publisher Ecological Society of America
Language eng
Abstract Arbuscular mycorrhizae are symbiotic associations among glomalean fungi and plant roots that often lead to enhanced water and nutrient uptake and plant growth. We describe experiments to test whether inoculum potential of arbuscular mycorrhizal (AM) fungal communities varies spatially within a broadleaf temperate forest, and also whether there is variability in the effectiveness of AM fungal communities in enhancing seedling growth. Inoculum potential of arbuscular mycorrhizal fungi in a temperate broad-leaved forest did not vary significantly among sites. Inoculum potential, measured as the extent to which the roots of red maple seedlings that had been germinated on sterile sand and then transplanted into the forest, were colonized by AM fungi, was similar in floodplain and higher elevation sites. It was as similar under ectomycorrhizal oaks as it was under red maples and other AM tree species. It was also similar among sites with deciduous understory shrubs with arbuscular mycorrhizae (spicebush, Lindera benzoin) and those with evergreen vegetation with ericoid mycorrhizae (mountain laurel, Kalmia latifolia). Where spicebush was the dominant understory shrub, inoculum potential was greater under gaps in the canopy than within the understory. Survivorship of transplanted red maple seedlings varied significantly over sites but was not strongly correlated with measures of inoculum potential. In a greenhouse growth experiment, arbuscular mycorrhizal fungal communities obtained from tree roots from the forest had different effects on plant growth. Seedlings inoculated with roots of red maple had twice the leaf area after 10 wk of growth compared to the AM community obtained from roots of southern red oaks. Thus, although there appears to be little heterogeneity in inoculum potential in the forest, there are differences in the effectiveness of different inocula. These effects have the potential to affect tree species diversity in forests by modifying patterns of seedling recruitment.
Keyword Ecology
Acer Rubrum
Arbuscular Mycorrhizae
Inoculum Potential
Maryland, Usa
Quercus Falcata
Temperate Forest
Treefall Gaps
Plant Community Structure
Tree Soil Interactions
Spatial Patterns
Tropical Australia
Floodplain Forests
Temperate Forests
Seedling Growth
Use Efficiency
Kakadu Region
Jarrah Forest
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Ecology Centre Publications
Centre for Marine Studies Publications
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 13 Aug 2007, 12:50:05 EST