Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/880536
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dc.contributor.authorGEROMEL, C.pt_BR
dc.contributor.authorFERREIRA, L. P.pt_BR
dc.contributor.authorDAVRIEUX, F.pt_BR
dc.contributor.authorGUYOT, B.pt_BR
dc.contributor.authorRIBEYRE, F.pt_BR
dc.contributor.authorSCHOLZ, M. B. dos S.pt_BR
dc.contributor.authorPEREIRA, L. F. P.pt_BR
dc.contributor.authorVAAST, P.pt_BR
dc.contributor.authorPOT, D.pt_BR
dc.contributor.authorLEROY, T.pt_BR
dc.contributor.authorANDROCIOLI FILHO, A.pt_BR
dc.contributor.authorVIEIRA, L. G. E.pt_BR
dc.contributor.authorMAZZAFERA, P.pt_BR
dc.contributor.authorMARRACCINI, P.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2011-03-11pt_BR
dc.date.issued2008pt_BR
dc.identifier.citationPLANT PHYSIOLOGY AND BIOCHEMISTRY, v.46, n.5-6, p.569-579, may-june, 2008.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/880536pt_BR
dc.descriptionCoffee fruits grown in shade are characterized by larger bean size than those grown under full-sun conditions. The present study assessed the effects of shade on bean characteristics and sugar metabolism by analyzing tissue development, sugar contents, activities of sucrose metabolizing enzymes and expression of sucrose synthase-encoding genes in fruits of coffee (Coffea arabica L.) plants submitted to full-sun (FS) and shade (SH) conditions. Evolution of tissue fresh weights measured in fruits collected regularly from flowering to maturation indicated that this increase is due to greater development of the perisperm tissue in the shade. The effects of light regime on sucrose and reducing sugar (glucose and fructose) contents were studied in fresh and dry coffee beans. Shade led to a significant reduction in sucrose content and to an increase in reducing sugars. In pericarp and perisperm tissues, higher activities of sucrose synthase (EC 2.4.1.13) and sucrose-phosphate synthase (SPS: EC 2.4.1.14) were detected at maturation in the shade compared with full sun. These two enzymes also had higher peaks of activities in developing endosperm under shade than in full sun. It was also noted that shade modified the expression of SUS-encoding genes in coffee beans; CaSUS2 gene transcripts levels were higher in SH than in FS. As no sucrose increase accompanied these changes, this suggests that sucrose metabolism was redirected to other metabolic pathways that need to be identified.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectFruit developmentpt_BR
dc.subjectSugar metabolismpt_BR
dc.titleEffects of shade on the development and sugar metabolism of coffee (Coffea arabica L.) fruits.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2011-07-07T11:11:11Zpt_BR
dc.subject.thesagroCoffea Arábicapt_BR
dc.subject.nalthesaurusGene expressionpt_BR
dc.subject.nalthesaurusShadept_BR
dc.subject.nalthesaurusSucrose synthasept_BR
dc.format.extent2569-579pt_BR
riaa.ainfo.id880536pt_BR
riaa.ainfo.lastupdate2011-07-07pt_BR
dc.contributor.institutionCLARA GEROMEL, UNICAMP; LÚCIA PIRES FERREIRA, IAPAR; FABRICE DAVRIEUX, CIRAD-UMR; BERNARD GUYOT, CIRAD-UMR; FABIENNE RIBEYRE, CIRAD-UMR; MARIA BRÍGIDA DOS SANTOS SCHOLZ, IAPAR; LUIZ FILIPE PROTASIO PEREIRA, SAPC; PHILIPPE VAAST, CIRAD-UPR; DAVID POT, IAPAR/CIRAD-UMR; THIERRY LEROY, CIRAD-UMR; ARMANDO ANDROCIOLI FILHO, IAPAR; LUIZ GONZAGA ESTEVES VIEIRA, IAPAR; PAULO MAZZAFERA, UNICAMP; PIERRE MARRACCINI, IAPAR/CIRAD-UMF.pt_BR
Aparece nas coleções:Artigo em periódico indexado (SAPC)

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