Non-mycorrhizal uptake of amino acids by roots of the alpine sedge Kobresia myosuroides: implications for the alpine nitrogen cycle
Tipo de material:
TextoSeries ; Oecologia, 108(39), p.488-494, 1996Trabajos contenidos: - Raab, T.K
- Lipson, D:A
- Monson, R.K
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CICY Documento préstamo interbibliotecario | Ref1 | B-10144 (Browse shelf(Opens below)) | Available |
Non-mycorrhizal plants of the alpine sedge, Kobresia myosuroides, take up the amino acid glycine from nutrient solutions at greater rates than NO 3- or NH4+. The amino acids glutamate and proline were also taken up at high rates. Total plant biomass was twice as high after 4 months of growth on glycine, compared to NH4NO3, with significant increases in both root and leaf biomass. By taking advantage of differences in the 6~3C signature of air in the growth chamber and the glycine used for growth, a two-member mixing model was used to estimate that a significant amount of the glycine was taken up as intact molecules, enough to contribute 16
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