Data/hora: 13/06/2024 07:06:04

Provedor de dados: | 124
País: | Brazil
Título: | Variations in desiccation tolerance in seeds of Eugenia pyriformis: dispersal at different stages of maturation
Autores: | Lamarca,Edmir Vicente; Camargo,Marcelo Bento Paes de; Teixeira,Simone de Padua; Silva,Edvaldo Aparecido Amaral da; Faria,Jose Marcio Rocha; Barbedo,Claudio Jose.
Data: | 2016-03-01
Ano: | 2016
Palavras-chave: | Myrtaceae; Uvaieira; Degree days; Physiological quality; Drying.
Resumo: | ABSTRACT Eugenia pyriformis Cambess., known locally as uvaieira, a species of fruit-bearing tree with both pharmacological and gastronomic potential, has seeds which are sensitive to desiccation. The aim of this study was to analyse whether the degree of tolerance to desiccation of uvaieira seeds depends on the stage of maturation of the seeds at shedding. This, in turn, depends on the environmental conditions in which the seeds develop, including the accumulation of degree-days and rainfall in the period. Seeds were collected from the ripe fruit of parent plants located in the states of São Paulo and Minas Gerais, Brazil, submitted to drying and analysed for water content and germination. A completely randomised design was used in a 20 x 3 factorial scheme (source of material x level of drying). The degree of desiccation tolerance differs between region and period of collection, even for the same parent plant when the seeds are collected in different years. The water and thermal conditions of the environment during seed development modify the maturation cycle, the physiological quality and the acquisition of desiccation tolerance. In uvaieira seeds, desiccation tolerance depends on the physiological maturity of the seeds at the time of dispersal, which is associated with the environmental conditions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100118
Editor: | Universidade Federal do Ceará
Relação: | 10.5935/1806-6690.20160014
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.47 n.1 2016
Fonte: | info:eu-repo/semantics/openAccess