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dc.contributor.authorMAGALHAES, P. C.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created1997-03-21pt_BR
dc.date.issued1984pt_BR
dc.identifier.citation1984.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/474162pt_BR
dc.descriptionSource-sink relationhips is a controversial topic. Some workers assert that grain yield in corn is limited by availability of assimilate during the grain filling period. Others have reported the sink size as the limiting factor. In this research, I studied the effects of assimilate availabilibty on kernel growth rate and final weight by investigating the effects of altered source/sink ratios on soluble sugars, starch and nitrogen content in plant parts of maize. Special attention was given to plant's compensatory response such as soluble carbohydrates and nitrogen redistribution to the grain. Two genotypes: M14 x W64A and Pionner-brand '3780', were grown in field plots at St. Paul, Mn in 1982. The treatment were arranged in a split plot manner in a randomized complete block design of four replicates. The alterations of source/sink ratio consisted of partial kernel removal (removing the tip half of the ear), and thinning by a 50% plant population reduction imposed before and after the onset of linear growth (6 days and 24 days after mid-silking, respectively). M14 x W64A responded to early thinning, as indicated by an extended grain filling period, increased starch content of the kernels and greater final kernel weight. However, kernel growth rate, number of kernels per ear and kernel soluble sugars content were not affected. Thinning and partial kernel removel on both dates increased internode dry weight and soluble sugar content. Kernels removal early enhanced the nitrogen content in the internodes and (...)pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectAssimilacaopt_BR
dc.subjectCarboidratospt_BR
dc.subjectMaizept_BR
dc.subjectGrainpt_BR
dc.titleEffects of assimilate enhancement on grain filling and carbohydrate and nitrogen partitioning in maize.pt_BR
dc.typeTesespt_BR
dc.date.updated2017-05-25T11:11:11Zpt_BR
dc.subject.thesagroFisiologiapt_BR
dc.subject.thesagroGrãopt_BR
dc.subject.thesagroMilhopt_BR
dc.subject.thesagroNitrogêniopt_BR
dc.subject.thesagroZea Mayspt_BR
dc.subject.nalthesauruscarbohydratespt_BR
dc.subject.nalthesaurusphysiologypt_BR
dc.subject.nalthesaurusnitrogenpt_BR
dc.description.notesDissertação (Mestrado) - University of Minnesota, Minneapolis.pt_BR
dc.format.extent234 p.pt_BR
riaa.ainfo.id474162pt_BR
riaa.ainfo.lastupdate2017-05-25pt_BR
dc.contributor.institutionPAULO CESAR MAGALHAES, CNPMS.pt_BR
Aparece nas coleções:Tese/dissertação (CNPMS)

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