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Endomycorrhizal fungal species mediate 15N transfer from soybean to maize in non-fumigated soil |
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| Authors: | C Hamel C Nesser U Barrantes-Cartín D L Smith |
| Institution: | (1) I.R.B.V. 4101 Sherbrooke est, H1X 2B2 Montréal, Qc, Canada;(2) Plant Science Department, Macdonald College, 21111 Lakeshore Rd., H9X 1C0 Ste-Anne de Bellevue, Qc, Canada;(3) Departamento de Ciencias, I.T.C.R. Sede San Carlos, Alajuela, Costa Rica |
| Abstract: | The effect of mycorrhizal inoculation on 15N transfer from soybean to maize was studied in fumigated and non-fumigated soil. Three Glomus species and a non-inoculated control were compared.In spite of higher levels of root colonization and more abundant hyphae associated with plants growing in fumigated soil, mycorrhizae-enhanced 15N transfer to maize was significant only in non-fumigated plots. High 15N transfer was not only associated with high mycelium density in soil but also with low soil microbial carbon, suggesting that the effect of mycorrhizal fungi on soil microbial populations may be an important factor affecting N transfer between mycorrhizal plants. |
| Keywords: | fumigation Glomus intraradices G vesiculiferum G versiforme Glycine max grass-legume mixture 15N nitrogen transfer soil microorganisms Zea mays |
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