Show simple item record

dc.contributor.authorRubia, Leilaen
dc.contributor.authorRangan, Lathaen
dc.contributor.authorChoudhury, Rimjhim Royen
dc.contributor.authorKamínek, Miroslaven
dc.contributor.authorDobrev, Petreen
dc.contributor.authorMalbeck, Jirien
dc.contributor.authorSlater, A.en
dc.contributor.authorScott, Nigel W.en
dc.contributor.authorBennett, Johnen
dc.contributor.authorPeng, Shaobingen
dc.contributor.authorKhush, Gurdev S.en
dc.contributor.authorElliott, Malcolm C.en
dc.contributor.authorFowler, Mark R.en
dc.date.accessioned2014-02-03T10:59:13Z
dc.date.available2014-02-03T10:59:13Z
dc.date.issued2013-08
dc.identifier.citationRubia, L. et al. (2013) Changes in the Chlorophyll Content and Cytokinin Levels in the Top Three Leaves of New Plant Type Rice During Grain Filling. Journal of Plant Growth Regulation. 33 (1), pp. 66-76en
dc.identifier.issn1435-8107
dc.identifier.urihttp://hdl.handle.net/2086/9660
dc.description.abstractThis paper reports the ways that the differences in leaf senescence are related to grain filling, grain yield, and the dynamics of cytokinins (CKs) in the top three leaves of four field-grown new plant type (NPT) rice, a tropical japonica developed at the International Rice Research Institute, Philippines, to increase the yield potential of rice. The chlorophyll content in leaves decreased from flowering to maturity in all the NPT lines, whereas the grain filling percentage was higher in the fast-senescing NPT line than in slow-senescing NPT line. Grain yield was positively correlated with senescence in the flag leaf. Rapid changes in the CK levels were recorded in the leaves of the fast-senescing line, whereas the CK levels were relatively stable in leaves of the slow-senescing line, suggesting that the dynamics of CKs in the fast-senescing line are vital for fast senescence. There were no significant changes in bioactive CKs, CK O-glucosides (storage CKs), and cis-zeatin derivatives in different leaves of the slow-senescing NPT line between 0 and 3 weeks after flowering, suggesting that the content of these CKs is relatively stable during grain filling. A progressive increase in levels of bioactive CKs was positively correlated with gradual accumulation of CK N-glucosides (inactive CKs) in the top three leaves of the slow-senescing NPT line, whereas the decrease of bioactive CKs in the flag leaf of the fast-senescing line was accompanied by accumulation of CK O-glucosides. These results suggest that there is a higher rate of biosynthesis and/or import of bioactive CKs as well as their turnover which may favor delay of leaf senescence in the slow-senescing NPT line.en
dc.language.isoenen
dc.publisherSpringeren
dc.subjectplant developmenten
dc.subjectcytokininsen
dc.titleChanges in the Chlorophyll Content and Cytokinin Levels in the Top Three Leaves of New Plant Type Rice During Grain Fillingen
dc.typeArticleen
dc.identifier.doihttp://dx.doi.org/10.1007/s00344-013-9374-0
dc.researchgroupChemistry for Healthen
dc.peerreviewedYesen
dc.explorer.multimediaNoen
dc.funderN/Aen
dc.projectidN/Aen


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record