Data/hora: 11/06/2024 02:40:11

Provedor de dados: | 74
País: | Brazil
Título: | Galactinol synthase transcriptional profile in two genotypes of Coffea canephora with contrasting tolerance to drought
Autores: | Santos,Tiago Benedito Dos; Lima,Rogério Barbosa de; Nagashima,Getúlio Takashi; Petkowicz,Carmen Lucia de Oliveira; Carpentieri-Pípolo,Valéria; Pereira,Luiz Filipe Protasio; Domingues,Douglas Silva; Vieira,Luiz Gonzaga Esteves.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Coffee; Drought stress; Raffinose family oligosaccharides (RFOs).
Resumo: | Increased synthesis of galactinol and raffinose family oligosaccharides (RFOs) has been reported in vegetative tissues in response to a range of abiotic stresses. In this work, we evaluated the transcriptional profile of a Coffea canephora galactinol synthase gene (CcGolS1) in two clones that differed in tolerance to water deficit in order to assess the contribution of this gene to drought tolerance. The expression of CcGolS1 in leaves was differentially regulated by water deficit, depending on the intensity of stress and the genotype. In clone 109A (drought-susceptible), the abundance of CcGolS1 transcripts decreased upon exposure to drought, reaching minimum values during recovery from severe water deficit and stress. In contrast, CcGolS1 gene expression in clone 14 (drought-tolerant) was stimulated by water deficit. Changes in galactinol and RFO content did not correlate with variation in the steady-state transcript level. However, the magnitude of increase in RFO accumulation was higher in the tolerant cultivar, mainly under severe water deficit. The finding that the drought-tolerant coffee clone showed enhanced accumulation of CcGolS1 transcripts and RFOs under water deficit suggests the possibility of using this gene to improve drought tolerance in this important crop.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200182
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-475738220140171
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.38 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess