Data/hora: 06/06/2024 11:46:04

Biblioteca(s): 	Embrapa Arroz e Feijão; Embrapa Unidades Centrais.	
Data corrente: 	31/07/2015	
Data da última atualização: 	27/02/2019	
Autoria: 	GUIMARÃES, C. M.; STONE, L. F.; CASTRO, A. P. de; MORAIS JUNIOR, O. P. de.	
Afiliação: 	CLEBER MORAIS GUIMARAES, CNPAF; LUIS FERNANDO STONE, CNPAF; ADRIANO PEREIRA DE CASTRO, CNPAF; ODILON PEIXOTO DE MORAIS JUNIOR.	
Título: 	Physiological parameters to select upland rice genotypes for tolerance to water deficit.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 50, n. 7, p. 534-540, jul. 2015.	
ISSN: 	0100-204X	
DOI: 	10.1590/S0100-204X2015000700003	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to evaluate the feasibility of using physiological parameters for water deficit tolerance, as an auxiliary method for selection of upland rice genotypes. Two experiments - with or without water deficit - were carried out in Porangatu, in the state of Goiás, Brazil; the water deficit experiment received about half of irrigation that was applied to the well-watered experiment. Four genotypes with different tolerance levels to water stress were evaluated. The UPLRI 7, B6144F-MR-6-0-0, and IR80312-6-B-3-2-B genotypes, under water stress conditions, during the day, showed lower stomatal diffusive resistance, higher leaf water potential, and lower leaf temperature than the control. These genotypes showed the highest grain yields under water stress conditions, which were 534, 601, and 636 kg ha-1, respectively, and did not differ significantly among them. They also showed lower drought susceptibility index than the other genotypes. 'BRS Soberana' (susceptible control) was totally unproductive under drought conditions. Leaf temperature is a easy?read parameter correlated to plant?water status, viable for selecting rice genotypes for water deficit tolerance.	
Palavras-Chave: 	Leaf diffusive resistance; Leaf teperature; Leaf-water potential; Potencial de água de água na folha; Potencial de água na folha; Resistência difusiva foliar; Rsistência difusiva foliar; Temperatura foliar.	
Thesagro: 	Arroz; Deficiência hídrica; Oryza Sativa; Resistência a seca.	
Categoria do assunto: 	--
F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/128171/1/Physiological-parameters.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (33503-1) - UPC - AP - PP - 2015 -  - 2015 - DIS
AI-SEDE - (58106-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS