Data/hora: 08/06/2024 10:08:24

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 05/07/1995
Data da última atualização: | 05/07/1995
Autoria: | QIU, Y.; NISHINA, M. S.; PAULL, R. E.
Afiliação: | University of Hawaii at Manoa, 3190 Maile Way Honolulu, HI 96822.
Título: | Papaya Fruit Growth, Calcium Uptake, and Fruit Ripening.
Ano de publicação: | 1995
Fonte/Imprenta: | J. Amer, Soc. Hort. Sci. v.120, p.246-253, 1995
ISSN: | 0003-1062
Idioma: | Inglês
Conteúdo: | The uptake of Ca by Sunset papaya (Carica papaya L.) fruit and its role in ripening was studied. The highest mesocarp Ca uptake rate occurred in fruit that were < 40 days postanthesis when fruit transpiration was probably highest. Ca uptake rate by the mesocarp was low, from 60 to 80 days postanthesis when fruit fresh and dry weight increased. Mesocarp Ca uptake rate increased again from 100 to 140 days postanthesis when fruit fresh weigth growth rate declined and dry weight growth rate increased. Mesocarp Ca concentration did not significantly differ from the peduncle to the blossom end, although Ca was significantly higher in the outer than inner mesocarp at the fruit  equator. Mesocarp Caconcentration fluctuated significantlt throughout the year ranging from 68 to 204 ug*g-1 fresh weight (FW). Soil Ca application did not always increase fruit mesocarp Ca concentration, while K and N fertilization decreased mesocarp Ca Concentration. Attempts to increase mesocarp Ca concentration by spraying CaCl, onto papaya fruit during growth andby postharvest vacuun infiltration and dipping of the cut peduncle into CaCl were unsuccessful. Mesocarp Ca concentration was positively correlated to the firmnss of ripe papaya fruit and the rate of softening of mesicarp plugs. Less correlation was found between fruit firmnss and the ratio of Ca concentration to K or Mg concentration, ir ti Mg plus K concentrations.
Palavras-Chave: | Cultura de tecidos; Fertilizacao; Mesocarpo.
Thesagro: | Análise.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (3079-1) - ADC - AP - -- - 630.5 -  - 630.5 - DIS