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dc.contributor.author Iain S. en_US
dc.contributor.author Alan P. en_US
dc.contributor.author Howard en_US
dc.contributor.author Keith J. en_US
dc.contributor.author David en_US
dc.contributor.author Caron L. en_US
dc.contributor.author Ann M. en_US
dc.contributor.author Helen J. en_US
dc.date.accessioned 2008-12-11T17:06:30Z
dc.date.available 2008-12-11T17:06:30Z
dc.date.issued 2007-02 en_US
dc.identifier http://dx.doi.org/10.1111/j.1469-8137.2006.01928.x en_US
dc.identifier.citation Donnison , I S , Gay , A P , Thomas , H , Edwards , K J , Edwards , D , James , C L , Thomas , A M & Ougham , H J 2007 , ' Modification of nitrogen remobilization, grain fill and leaf senescence in maize (Zea mays) by transposon insertional mutagenesis in a protease gene ' New Phytologist , vol 173 , no. 3 , pp. 481-494 . , 10.1111/j.1469-8137.2006.01928.x en_US
dc.identifier.other PURE: 92570 en_US
dc.identifier.other dspace: 2160/1565 en_US
dc.identifier.uri http://hdl.handle.net/2160/1565
dc.description.abstract A maize (Zea mays) senescence-associated legumain gene, See2β, was characterized at the physiological and molecular levels to determine its role in senescence and resource allocation. • A reverse-genetics screen of a maize Mutator (Mu) population identified a Mu insertion in See2β. Maize plants homozygous for the insertion were produced. These See2 mutant and sibling wild-type plants were grown under high or low quantities of nitrogen (N). • The early development of both genotypes was similar; however, tassel tip and collar emergence occurred earlier in the mutant. Senescence of the mutant leaves followed a similar pattern to that of wild-type leaves, but at later sampling points mutant plants contained more chlorophyll than wild-type plants and showed a small extension in photosynthetic activity. Total plant weight was higher in the wild-type than in the mutant, and there was a genotype × N interaction. Mutant plants under low N maintained cob weight, in contrast to wild-type plants under the same treatment. • It is concluded, on the basis of transposon mutagenesis, that See2β has an important role in N-use and resource allocation under N-limited conditions, and a minor but significant function in the later stages of senescence. en_US
dc.format.extent 14 en_US
dc.relation.ispartof New Phytologist en_US
dc.title Modification of nitrogen remobilization, grain fill and leaf senescence in maize (Zea mays) by transposon insertional mutagenesis in a protease gene en_US
dc.contributor.pbl Institute of Biological, Environmental and Rural Sciences en_US


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