| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||
1 Facultad de Ciencias Naturales y Museo, Instituto Spegazzini, La Plata, Buenos Aires, 1900, Argentina
2 UNLP, Instituto Spegazzini, Aven. 53 # 477, La Plata, Buenos Aires, B1900AVJ, Argentina
Arbuscular Mycorrhizal Fungi (AMF) can use different types of propagules to colonize new roots. In this work we tested different types of AMF inocula obtained from a field experiment with tilled and no-tilled soils planted with wheat as well as from non-disturbed treatments with spontaneous vegetation. AMF trap cultures were carried out using soil, mycelium, segments of roots and wheat plants from the field as a source of inoculum. Then, after the senescence of the trap plants, Glomeromycota species which had been established from each type of propagule in the substrate from the pots were identified. In the field soils, the proportions of Acaulosporaceae and Gigasporaceae were relatively similar to that of Glomeraceae, mainly in conventional tillage, whereas in all the trap cultures evaluated, the percentages of members of the Glomeraceae family were higher than 90 %. Since most of the trap cultures were based on intra and/or extra radical mycelium, our results show that the members of Glomeraceae have advantages in the use of these propagules over Acaulosporaceae and Gigasporaceae species. We suggest that the higher contribution of Glomeraceae previously found in no-tillage systems could be partially related to the lack of disruption of the hyphal network and the composition of the soil propagules in this system.
Key words: Agricultural practices, AMF-mycelium, Glomeromycetes, root fragments, trap culture
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
