Non-mycorrhizal uptake of amino acids by roots of the alpine sedge Kobresia myosuroides: implications for the alpine nitrogen cycle 

 -  Oecologia, 108(39), p.488-494, 1996 .
<br/><br/> 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 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ALPINE PLANTS<br/>N ITROGEN CYCLE<br/>CYPERACEAE<br/>TUNDRA<br/>ORGANIC NITROGEN