Effect of preharvest spraying with thidiazuron on fruit quality and maturity of apples



Document title: Effect of preharvest spraying with thidiazuron on fruit quality and maturity of apples
Journal: Revista brasileira de fruticultura
Database: PERIÓDICA
System number: 000304015
ISSN: 0100-2945
Authors: 1

Institutions: 1Universidade do Estado de Santa Catarina, Centro de Ciencias Agroveterinarias, Lages, Santa Catarina. Brasil
Year:
Season: Abr
Volumen: 25
Number: 1
Pages: 59-62
Country: Brasil
Language: Inglés
Document type: Nota breve o noticia
Approach: Experimental
English abstract Apple trees, cultivars Gala and Fuji, were sprayed at full bloom with thidiazuron (TDZ) at the doses of 0, 5, 10, or 20 g (a.i.) ha-1 and fruit were assessed for quality and maturity. In both cultivars, the increase of TDZ dose had detrimental effects on fruit quality, causing a reduction of fruit red surface and an increase of percentage of fruit that was asymmetrical and with calyx-end rot. TDZ caused an increment of calyx-end aperture that might have increased calyx-end rot. TDZ increased density and the length : diameter (L : D) ratio of the fruit. The number of viable seeds was not affected by TDZ. TDZ resulted in a substantial delay of fruit maturity in 'Gala' but not in 'Fuji'. TDZ also reduced soluble solids content (SSC) in 'Gala' and reduced titratable acidity in both cultivars
Portuguese abstract Macieiras, cultivares Gala e Fuji, foram pulverizadas em plena floração com thidiazuron (TDZ), nas doses de 0; 5; 10 e 20 g (i.a.) ha-1, e os frutos avaliados em termos de qualidade e maturação. Em ambas as cultivares, o TDZ apresentou efeitos negativos na qualidade dos frutos, com redução na percentagem de cor vermelha na casca e aumento na percentagem de frutos assimétricos e com podridão carpelar. O TDZ causou aumento na abertura carpelar, o que pode ter ocasionado aumento de incidência de podridão carpelar. O TDZ aumentou a densidade e a relação comprimento : diâmetro (C : D) dos frutos. O número de sementes viáveis não foi afetado pelo TDZ. O TDZ retardou substancialmente a maturação dos frutos na cultivar Gala, mas não na cultivar Fuji. O TDZ reduziu os teores de sólidos solúveis totais na cultivar Gala e reduziu a acidez titulável em ambas as cultivares
Disciplines: Agrociencias
Keyword: Fitotecnia,
Frutales,
Manzana,
Malus domestica,
Variedades,
Citocinas,
Thidiazuron,
Maduración,
Calidad
Keyword: Agricultural sciences,
Crop husbandry,
Fruit trees,
Apple,
Malus domestica,
Cultivars,
Cytokines,
Thidiazuron,
Maturation,
Quality
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