Abstract
This paper describes research on interactions between grassland plant species and soil microorganisms. Both parasitic and symbiotic microorganisms modify nutrient transfers between plants and soil. Experiments are described in which nematode infection of clover increased nitrogen transfer to companion ryegrass plants. Infection of clover enhanced activity of soil bacterial and fungal communities. Legume genotypes differing only in responses to symbionts (rhizobium and arbuscular mycorrhizal fungi) and pathogens are being developed for studies of gene expression during establishing and functional symbioses. Such plants can be used in experiments as defined perturbations that will provide information on the interactions and functions of symbiotic and pathogenic microorganisms. Such studies, related to field observations, may have value for defining biological attributes of sustainable grassland soil systems.
KEYW gene expression, nematodes, nutrient cycling, mycorrhizae, rhizobia,
white clover.
KEYW gene expression, nematodes, nutrient cycling, mycorrhizae, rhizobia,
white clover.
Original language | English |
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Title of host publication | Grassland Ecosystems: An Outlook into the 21st Century |
Editors | J. A. Gomide, W. R. S. Mattos, S. Carneiro da Silva |
Publisher | Fundação de Estudos Agrarios Luiz de Queiroz |
Pages | 167-168 |
Number of pages | 2 |
ISBN (Print) | 8571330107 |
Publication status | Published - 2001 |
Event | Proceedings 19th International Grassland Congress - Sao Paulo, Brazil Duration: 10 Feb 2001 → 21 Feb 2001 |
Conference
Conference | Proceedings 19th International Grassland Congress |
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Country/Territory | Brazil |
City | Sao Paulo |
Period | 10 Feb 2001 → 21 Feb 2001 |