Data/hora: 09/06/2024 21:47:57

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	20/09/2017	
Data da última atualização: 	20/09/2017	
Autoria: 	OLIVEIRA, T. M.; YAHMED, J. B.; DUTRA, J.; MASERTI, B. E.; TALON, M.; NAVARRO, L.; OLLITRAUT, P.; GESTEIRA, A. da S.; MORILLON, R.	
Afiliação: 	TAHISE M. OLIVEIRA, UESC; JIHÈNE BEN YAHMED, SEAPAG; JOADSON DUTRA, UESC; BIANCA E. MASERTI, Istituto per la Protezione Sostenibile delle Piante; MANUEL TALON, Instituto Valenciano de Investigaciones Agraria; LUIS NAVARRO, nstituto Valenciano de Investigaciones Agrarias; PATRICK OLLITRAUT, SEAPAG; ABELMON DA SILVA GESTEIRA, CNPMF; RAPHAËL MORILLON, SEAPAG.	
Título: 	Better tolerance to water deficit in doubled diploid 'Carrizo citrange' compared to diploid seedlings is associated with more limited water consumption.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Acta Physiologiae Plantarum, 2017.	
ISSN: 	0137-5881	
Idioma: 	Inglês	
Conteúdo: 	olerance to water deficit in diploid (2x) and doubled diploid (4x) ?Carrizo citrange? (Citrus sinensis [L.] Osbeck × Poncirus trifoliata [L.] Raf) was investigated. Water deficit was applied for 4 weeks. Physiological parameters, including stomatal conductance (gs), photosynthesis (A), transpiration (E), leaf and soil water potentials (?leaf; ?soil), and pot water loss, were monitored throughout the stress. Moreover, ABA, H2O2 contents, and the expression of genes involved in ABA biosynthesis (NCED3), regulation of abscisic acid signaling (ABI1), and coding for a catalase enzyme (CAT2) known to favor H2O2 scavenging were monitored. During the experiment gs, A, and E values were most of the time higher in 2x compared to 4x. During the water deficit period, pot water loss decreased faster in 2x compared to 4x, leading to a faster decrease in all physiological parameters in 2x. The higher sensitivity of 2x compared to 4x was correlated with more numerous thinner roots, higher leaf ABA and H2O2 contents, and with the lower leaf water potential. ABI1 and NCED3 expression was not strictly correlated with the ABA content. However, the higher CAT2 expression in 4x was correlated with the lower leaf H2O2 contents. Therefore, the better tolerance observed in 4x ?Carrizo citrange? compared to 2x was associated with more limited water consumption and better and H2O2 scavenging.	
Thesagro: 	Fruta cítrica.	
Thesaurus Nal: 	Citrus.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
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