Mycorrhizal benefit in two low arctic herbs increases with increasing temperature
- 1 August 2007
- journal article
- Published by Wiley in American Journal of Botany
- Vol. 94 (8), 1309-1315
- https://doi.org/10.3732/ajb.94.8.1309
Abstract
Climate change may influence the relationship between arctic plants and their symbiotic mycorrhizal fungi. The benefit of the symbiosis for the host plant affects vegetation succession and may be a key parameter in predicting vegetation responses to warming. We investigated the mycorrhizal benefit in the low arctic perennial herbs Potentilla crantzii and Ranunculus acris in symbiosis with the arbuscular mycorrhizal fungus Glomus claroideum. Temperature response in the mycorrhiza-mediated acquisition of nitrogen (N) and phosphorus (P), growth, and photosynthetic nutrient-use efficiency were determined. Near the average natural soil temperature (12°C), mycorrhiza did not improve plant nutrient capture but significantly enhanced plant P capture at 17°C. Photosynthetic nitrogen-use efficiency was higher at 17°C than at 12°C and was further increased by mycorrhiza at 17°C. Photosynthetic phosphorus-use efficiency was not affected by temperature or mycorrhiza. Increasing the growing temperature by 5°C increased the relative shoot growth rate by 15%. Mycorrhizal symbiosis did not enhance plant growth rate, but the plants gained between 20% and 90% more mycorrhiza-mediated P when grown at higher temperature. The results suggest that these low arctic species have good potential to respond positively to increasing temperatures.Keywords
This publication has 50 references indexed in Scilit:
- Reconciling plant strategy theories of Grime and TilmanJournal of Ecology, 2005
- Mycorrhiza does not alter low temperature impact on Gnaphalium norvegicumOecologia, 2004
- Water relations, drought and vesicular-arbuscular mycorrhizal symbiosisMycorrhiza, 2001
- Arbuscular mycorrhizas and biological control of soil-borne plant pathogens - an overview of the mechanisms involvedMycorrhiza, 1997
- Nutrient Acquisition and Community Structure in Co-Occurring Mycotrophic and Non-mycotrophic Oldfield AnnualsFunctional Ecology, 1994
- Phosphorus uptake and growth of barley as affected by soil temperature and mycorrhizal infectionJournal of Plant Nutrition, 1994
- The Mycorrhizal Status of Plants at Alexandra Fiord, Ellesmere Island, Canada, a High Arctic SiteMycologia, 1990
- In situ Photosynthetic Responses to Light, Temperature and Carbon Dioxide in Herbaceous Plants from Low and High AltitudeFunctional Ecology, 1987
- Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infectionTransactions of the British Mycological Society, 1970
- THE ECOLOGY OF ARCTIC AND ALPINE PLANTSBiological Reviews, 1968