Nitrogen management and senescence in two maize hybrids differing in the persistence of leaf greenness: agronomic, physiological and molecular aspects

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dc.contributor.author Floriot, Mathieu
dc.contributor.author Martin, Antoine
dc.contributor.author Belastegui-Macadam, Xana
dc.contributor.author Quillere, Isabelle
dc.contributor.author Valadier, Marie-Helene
dc.contributor.author Hirel, Bertrand
dc.contributor.author Andrieu, Bruno
dc.contributor.author Pommel, Bernard
dc.contributor.author Donnison, Iain S.
dc.date.accessioned 2009-09-07T11:48:48Z
dc.date.available 2009-09-07T11:48:48Z
dc.date.issued 2005-04-12
dc.identifier.citation Floriot , M , Martin , A , Belastegui-Macadam , X , Quillere , I , Valadier , M-H , Hirel , B , Andrieu , B , Pommel , B & Donnison , I S 2005 , ' Nitrogen management and senescence in two maize hybrids differing in the persistence of leaf greenness: agronomic, physiological and molecular aspects ' New Phytologist , pp. 483-492 . , 10.1111/j.1469-8137.2005.01430.x en
dc.identifier.issn 0028-646X
dc.identifier.other PURE: 116859
dc.identifier.other dspace: 2160/2924
dc.identifier.uri http://hdl.handle.net/2160/2924
dc.description Martin, A., Belastegui-Macadam, X., Quillere, I., Floriot, M., Valadier, M-H., Pommel, B., Andrieu, B., Donnison, I. S., Hirel, B. (2005). Nitrogen management and senescence in two maize hybrids differing in the persistence of leaf greenness: agronomic, physiological and molecular aspects.  New Phytologist, 167, (2), 483-492 en
dc.description.abstract Here, nitrogen management within the plant was compared in an early-senescing maize hybrid and in a late-senescing maize hybrid, both grown under field conditions with a high fertilisation input involving large quantities of fertiliser. We monitored, in representative leaf stages, the changes in metabolite content, enzyme activities and steady-state levels of transcripts for marker genes of N primary assimilation, N recycling and leaf senescence. The hybrids differed in terms of persistence of leaf greenness, the expression of marker genes and the concentration of enzymes used to describe the transition from N assimilation to N recycling. The transcription of leaf-senescence marker genes did not differ. Agronomic studies confirmed the ability of the late-senescing hybrid to absorb and store more N in shoots. Despite the differences in the mode of N management adopted by the two hybrids, we conclude that leaf senescence occurs independently of the source-to-sink transition at the high level of fertilisation used involving large quantities of fertiliser. The possibility of improving N metabolic efficiency in the latest maize hybrids is discussed. en
dc.format.extent 10 en
dc.language.iso eng
dc.relation.ispartof New Phytologist en
dc.title Nitrogen management and senescence in two maize hybrids differing in the persistence of leaf greenness: agronomic, physiological and molecular aspects en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1111/j.1469-8137.2005.01430.x
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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