Modification of nitrogen remobilization, grain fill and leaf senescence in maize (Zea mays) by transposon insertional mutagenesis in a protease gene

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dc.contributor.author Donnison, Iain S.
dc.contributor.author Gay, Alan P.
dc.contributor.author Thomas, Howard
dc.contributor.author Edwards, Keith J.
dc.contributor.author Edwards, David
dc.contributor.author James, Caron L.
dc.contributor.author Thomas, Ann M.
dc.contributor.author Ougham, Helen J.
dc.date.accessioned 2008-12-11T17:06:30Z
dc.date.available 2008-12-11T17:06:30Z
dc.date.issued 2007-02
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
dc.identifier.issn 0028-646X
dc.identifier.other PURE: 92570
dc.identifier.other dspace: 2160/1565
dc.identifier.uri http://hdl.handle.net/2160/1565
dc.identifier.uri http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1469-8137.2006.01928.x?cookieSet=1 en
dc.description Donnison, I. S., Gay, A. P., Thomas, Howard, 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 mutagenensis in a protease gene. New Phytologist, 173 (3), 481-494. Sponsorship: BBSRC RAE2008 en
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
dc.format.extent 14 en
dc.language.iso eng
dc.relation.ispartof New Phytologist en
dc.title Modification of nitrogen remobilization, grain fill and leaf senescence in maize (Zea mays) by transposon insertional mutagenesis in a protease gene en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1111/j.1469-8137.2006.01928.x
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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