03344nab a2200265 i 4500003000900000005001700009008004100026040001800067072001400085072000800099100003000107245007800137500006600215520129500281520109801576650001402674650001602688650002702704650001602731650002302747773021502770856006602985942000803051999001903059BR-BrBNA20250630175417.0250630b2020    bl.tr|pooa||| 00| 0 por |  aBR-BrBNAbpor  aF62b0716  aF40  aGabriel Berenhauser Leite  aA origem da heterogeneidade da brotação em regiões de inverno ameno  a

Publicação online; 6 ref.; 4 illus.; Summaries (En, Pt)  a


Resumo −     Sob  condições  de  inverno  ameno,  espécies  frutíferas  temperadas  sofrem  problemas  agronômicos  resultantes  de brotamento  e  floração  heterogêneos.  O  padrão  de  evolução  da  dormência  e  da  brotação  de  pessegueiro  foi  estudado  em plantas com: 1) Condições naturais de inverno em clima temperado (CN); 2) Privação parcial de frio (PPF); e 3) Privação total de frio (PTF). A endodormência das gemas vegetativas foi caracterizada por meio do teste de estacas de gema única. As plantas com privação de frio, tanto parcial como total, apresentaram evolução da dormência e taxa de brotação alteradas em relação às plantas sob CN. Os padrões de brotação dependeram dos padrões de saída da endodormência das gemas, tanto no tempo quanto no espaço. Em condições de inverno temperado, o gradiente de brotação tem origem na capacidade de crescimento das  gemas  após  a  saída  da  endodormência,  enquanto  em  condições  de  privação  parcial  de  frio  a  origem  está  na  evolução diferencial da endodormência das gemas ao longo do ramo. 


Termos para indexação:    Prunus persica; dormência; privação de frio; evolução da dormência  a

Abstract −    Under mild winter conditions, temperate fruit trees suffer agronomic problems resulting from budding and flowering heterogeneous.  The  pattern  of  evolution  of  dormancy  and  budding  from  peach  ‘Redhaven’  was  studied  with  natural  inter conditions (CN), partial deprivation of cold (PTF), and total deprivation of cold (PTF). Endodormence of the vegetative buds was characterized by the “one-node cuttings” test. The plants with cold deprivation (PPF and PTF) presented altered evolution of dormancy and budding rate in relation to CN plants. The budding patterns depended on the endodormence exit patterns of the buds, both in time and space. By the behavior observed in the evolution of dormancy and budding, we can infer that in temperate winter conditions, the budding gradient comes from the growth capacity of buds after leaving the endodormancy, while partial deprivation of cold is the origin of differential evolution of the endodormity of the buds along the branch. 


Index terms:    Prunus persica; dormancy; budding; cold deprivation; budburst  aPÊSSEGO  aCRESCIMENTO  aCONDIÇÃO AMBIENTAL  aDORMÊNCIA  aFISIOLOGIA VEGETAL0 018139317200dFlorianópolis-SC Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina 1988-o2024-3824tAgropecuária Catarinense (Brazil)x0103-0779gv. 33(1) p. 20-23; (2020)wBR2025004010  uhttps://publicacoes.epagri.sc.gov.br/rac/article/view/483/700  cANA  c332328d332328