Arbuscular mycorrhizae respond to elevated atmospheric CO2 after long-termexposure: evidence from a CO2 spring in New Zealand supports the resource balance model

Citation
Mc. Rillig et al., Arbuscular mycorrhizae respond to elevated atmospheric CO2 after long-termexposure: evidence from a CO2 spring in New Zealand supports the resource balance model, ECOL LETT, 3(6), 2000, pp. 475-478
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ECOLOGY LETTERS
ISSN journal
1461-023X → ACNP
Volume
3
Issue
6
Year of publication
2000
Pages
475 - 478
Database
ISI
SICI code
1461-023X(200011)3:6<475:AMRTEA>2.0.ZU;2-K
Abstract
The resource balance model predicts that under elevated atmospheric CO2, pl ants should preferentially allocate photosynthate to acquiring below-ground resources. Only short-term experiments are available to test this hypothes is, while long-term responses are really of interest in global change ecolo gy. Arbuscular mycorrhizae represent one mode of below-ground nutrient acqu isition available to the vast majority of plants. Percent root colonization by arbuscular mycorrhizal fungi (AMF), AMF soil hyphal length, and soil co ncentrations of the AMF protein glomalin increased linearly along a CO2 gra dient provided in a grassland by a CO2 spring in Northland, New Zealand. Th ese results are an important confirmation of numerous short-term studies, a nd present the first test of the resource balance model, applied to AMF, af ter long-term elevated CO2 exposure.