Record ID No. |
325 |
Author(s) |
Rillig, M.C., Hoye, AT., Carran, A , 2006 |
Affiliation |
University of Montana, Division of Biological Science, Microbial Ecology Program, Missoula, MT 59812 |
Title |
Minimal direct contribution of arbuscular mycorrhizal fungi to DOC leaching in grassland through losses of glomalin-related soil protein |
Source. Vol.(no):Page |
Soil biology & biochemistry. 38(9):2967-2970. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
General |
Sub-subjects |
|
Host |
n.a. |
Organism |
n.a. |
Country |
U.S.A., North America |
Abstracts |
Arbuscular mycorrhizal fungi (AMF) have multiple influences on ecosystem C cycling, but most research has focused on ecosystem C gains. We explore here the possibility of direct contributions of AMF to ecosystem C losses, namely via leaching of glomalin-related soil protein (GRSP). We tested the hypothesis that GRSP, an operationally defined SOM pool to which AMF contribute (especially as evidenced with monoclonal antibody MAb32B11-based detection), is mobile in soils and can be lost in leachate. For two New Zealand soils, we showed that only insignificant amounts of GRSP were lost: a maximum of 0.03% of MAb32B11-immunoreactive GRSP present in soils was lost during the week-long experiment, representing a minute fraction of total leachate dissolved organic carbon (0.06%). Our data showed that this pathway of C loss may be relatively unimportant in many soils. However, other indirect contributions of AMF to soil C losses remain yet to be explored. |