TY - BOOK AU - Raab,T.K. AU - Lipson,D:A AU - Monson,R.K. TI - Non-mycorrhizal uptake of amino acids by roots of the alpine sedge Kobresia myosuroides: implications for the alpine nitrogen cycle KW - ALPINE PLANTS KW - N ITROGEN CYCLE KW - CYPERACEAE KW - TUNDRA KW - ORGANIC NITROGEN N2 - 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 UR - https://drive.google.com/file/d/18J3uC60Pt7SaqcNQfTTDJh4mlJCCuwdv/view?usp=drivesdk ER -