caa a22 4500 47710925X CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00029278 doi (NATIONALLICENCE)springer-10.1007/BF00029278 A novel method for characterisation and quantification of plant root exudates [Elektronische Daten] [A. Hodge, S. Grayston, B. Ord] A microcosm unit is described which readily allows manipulation of experimental conditions to enable the subsequent impact on root exudation release to be monitored with time. Festuca ovina and Plantago lanceolata seedlings were grown in this microcosm unit over a 34 day experimental period under conditions of high (3.75 mol m−3 N) or low (1.25 mol m−3 N) nitrate-nitrogen treatment. At the end of the experimental period the seedlings in the microcosms were labelled with [14C]-CO2 and the fate of the label within the plant and its release by the roots monitored. Total organic carbon (TOC) content of the collected exudate material was measured throughout the experimental period as well as during the 14C-chase period and comparison of plant C budgets using these two measurements is discussed. Nitrogen treatment as found to have a greater effect on exudate release by F. ovina than by P. lanceolata seedlings as indicated by both the total organic carbon and 14C results. The use and applications of the microcosm unit are discussed. Kluwer Academic Publishers, 1996 C-budgets nationallicence Festuca ovina nationallicence nitrogen nationallicence Plantago lanceolata nationallicence root exudation nationallicence Hodge A. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Grayston S. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Ord B. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 184/1(1996-03-01), 97-104 0032-079X 184:1<97 1996 184 11104 https://doi.org/10.1007/BF00029278 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00029278 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hodge A. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 700 1- Grayston S. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 700 1- Ord B. Plants Division, The Macaulay Land Use Research Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl// 184/1(1996-03-01), 97-104 0032-079X 184:1<97 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer