Low nitrate uptake white clover genotype - Nitrogen relations of a low nitrate uptake inbred line of white clover (Trifolium repens L.)

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dc.contributor.author Raistrick, Neil
dc.contributor.author Michaelson-Yeates, Terry P. T.
dc.contributor.author Abberton, Michael T.
dc.contributor.author Macduff, James H.
dc.date.accessioned 2010-01-04T10:28:58Z
dc.date.available 2010-01-04T10:28:58Z
dc.date.issued 2002
dc.identifier.citation Raistrick , N , Michaelson-Yeates , T P T , Abberton , M T & Macduff , J H 2002 , ' Low nitrate uptake white clover genotype - Nitrogen relations of a low nitrate uptake inbred line of white clover (Trifolium repens L.) ' Plant and Soil , vol 238 , no. 2 , pp. 191-204 . , 10.1023/A:1014456622446 en
dc.identifier.issn 0032-079X
dc.identifier.other PURE: 133318
dc.identifier.other dspace: 2160/3926
dc.identifier.uri http://hdl.handle.net/2160/3926
dc.description Macduff, J. H., Abberton, M. T., Raistrick, N., Michaelson-Yeates, T. P. T. (2002). Low nitrate uptake white clover genotype - Nitrogen relations of a low nitrate uptake inbred line of white clover (Trifolium repens L.).  Plant and Soil, 238, (2), 191-204 Sponsorship: MAFF; BBSRC en
dc.description.abstract The nitrogen relations of an inbred line of white clover (Trifolium repens L.) thought to exhibit an abnormally low capacity for NO3 – uptake (line LNU) were compared with a line regarded as normal with respect to NO3 – uptake (line NNU). Growth, nodulation, N2 fixation and NO3 – uptake were measured over 7 weeks in flowing solution culture (Experiment 1) by plants dependent for N acquisition on either (i) NO3 – uptake, (ii) NO3 – uptake +N2 fixation, or (iii) N2 fixation only. Effects of plant N status on the short-term uptake and translocation of 15NH4 + and 15NO3 – were also investigated (Experiment 2). Nitrate uptake per plant by –fix/+NO3 – line LNU was 50% of uptake by line NNU over 35 days, and there were significant differences in specific uptake rates of NO3 – between the lines over the first 24 days. The `low NO3 – uptake' phenotype was indistinct under +fix/+NO3 – treatment. Nitrate lowered specific rates of nitrogen fixation by line NNU but had no effect on line LNU. Only low N status line LNU plants had lower short-term rates of NH4 + and NO3 – uptake than line NNU. It is concluded that the `low NO3 – uptake' phenotype of line LNU is inconsistently expressed. Circumstantial evidence points to increased NO3 – efflux and decreased xylem translocation of NO3 – as possible explanations for the lower NO3 – uptake by line LNU. en
dc.format.extent 14 en
dc.language.iso eng
dc.relation.ispartof Plant and Soil en
dc.subject genetic variation en
dc.subject inbred lines en
dc.subject nitrate uptake en
dc.subject nitrogen fixation en
dc.subject white clover en
dc.title Low nitrate uptake white clover genotype - Nitrogen relations of a low nitrate uptake inbred line of white clover (Trifolium repens L.) en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1023/A:1014456622446
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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