Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/1280
Título: Source-sink manipulations in Coffea arabica L. and its effect on growth of shoots and root system
Título(s) alternativo(s): Manipulação da relação fonte-dreno em Coffea arabica L. e seu efeito no crescimento da parte aérea e do sistema radicular
Palavras-chave: Carboidrato
Fonte-dreno
Cafeeiro
Sistema radicular
Carbohydrate
source-sink
coffee tree
root system
Data do documento: 2011
Editor: Universidade Federal de Lavras
Citação: ALVES, J. D. et al. Source-sink manipulations in Coffea arabica L. and its effect on growth of shoots and root system. Ciência e Agrotecnologia, Lavras, v. 35, n. 5, p. 956 -964, set./out. 2011.
Resumo: This paper investigated changes in growth and carbohydrate content of shoots and root systems in response to source-sink manipulation in field-grown coffee trees. The source-sink manipulations were carried out using manual de-fruiting. Two plots of trees were established: in one group, the fruit was left on the tree, while in the second group all fruits were removed manually. Similar results were obtained for coffee trees with and without fruit in terms of height, stem and skirt diameter and branch lengths. A biochemical evaluation of the roots showed that no differences were found between the levels of carbohydrates. In the leaves, levels of soluble sugars and reducing sugars were higher in plants with fruit. The starch concentration in leaves and roots did not vary between the plots. Root length density did not vary between plants with and without fruit in the 0 - 0.4 m soil layer. However, plants without fruit had a higher root length density than plants with a full fruit load. These results contrast with results published by others on source-sink relationships of coffee plants. The joint data analysis shows that young trees, with a moderate fruit load, and with good nutritional and health status, produce carbohydrates in sufficient quantities to maintain vegetative and reproductive growth, without harming root system growth.
URI: http://repositorio.ufla.br/jspui/handle/1/1280
Aparece nas coleções:Ciência e Agrotecnologia
DAG - Artigos publicados em periódicos
DBI - Artigos publicados em periódicos

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