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dc.contributor.authorBERTAN, M. A. J.
dc.contributor.authorOLIVEIRA, M. G. B. de
dc.contributor.authorPENSO, G. A.
dc.contributor.authorMAYER, N. A.
dc.contributor.authorCITADIN, I.
dc.date.accessioned2026-07-21T13:51:41Z-
dc.date.available2026-07-21T13:51:41Z-
dc.date.created2026-07-21
dc.date.issued2026
dc.identifier.citationTrees, v. 40, article number 68, 2026.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1188480-
dc.descriptionAbstract: Peach cultivation in subtropical regions faces critical challenges related to excessive vegetative growth, low winter chilling accumulation, and susceptibility to late frosts. The use of suitable rootstocks is a fundamental strategy to mitigate these problems, although the physiological mechanisms involved in vigour control and assimilate partitioning still demand investigation. This study aimed to determine the influence of five clonal rootstocks and the own-rooted scion cultivar (without rootstock) on the dynamics of the source-sink relationship and the seasonal partitioning of carbohydrates in ‘BRS-Kampai’ peach trees. Analyses such as shoot growth (SG), relative growth rate of shoots (RGR), and fruit diameter (FD) were performed; as well as the activity of the enzymes sorbitol oxidase (SOX) and acid invertase (AI), and concentration of reducing sugars (RS). High vigour group (own-rooted ‘BRS-Kampai’ and te ‘Okinawa’ rootstock) prioritises the diversion of assimilates to vegetative growth, resulting in smaller-sized fruits. In contrast, low vigour rootstocks (‘Cadaman®’ and ‘Clone 15’), although facilitating high-density management, present a delay in SG that induces direct competition with the initial phase of fruit development (cell division). The most efficient physiological balance was observed in medium vigour rootstocks (‘Tsukuba-2’ and ‘Tsukuba-3’), which showed the highest enzymatic activity (SOX and AI) in the fruits, indicating a superior sink strength in organs of economic interest. It is concluded that medium vigour optimises carbon partitioning to the fruits, consolidating the activity of both evaluated enzymes as a reliable marker of sink strength in peach trees under subtropical conditions.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectBRS-Kampai
dc.subjectSorbitol oxidase
dc.subjectAcid invertase
dc.subjectClimate adaptation
dc.subjectAssimilate partitioning
dc.subjectVigour management
dc.subjectSource sink relationship
dc.titleEnzyme activity of carbohydrate metabolism in own-rooted and grafted ‘BRS-Kampai’ peach trees.
dc.typeArtigo de periódico
dc.subject.thesagroPêssego
dc.subject.thesagroPorta Enxerto
dc.subject.thesagroFruta de Clima Temperado
dc.subject.thesagroGeada
dc.subject.thesagroMetabolismo Vegetal
dc.subject.thesagroCarboidrato
dc.subject.nalthesaurusPeaches
dc.description.notesODS: 02.
riaa.ainfo.id1188480
riaa.ainfo.lastupdate2026-07-21
dc.identifier.doihttps://doi.org/10.1007/s00468-026-02775-6
dc.contributor.institutionMICHELY APARECIDA JACOBSEN BERTAN, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ; MIGUEL GUSTAVO BEILNER DE OLIVEIRA, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ; GENER AUGUSTO PENSO, VIVEIRO BALDISSARELI; NEWTON ALEX MAYER, CPACT; IDEMIR CITADIN, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ.
Aparece en las colecciones:Artigo em periódico indexado (CPACT)

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