Data/hora: 04/06/2024 10:17:06

Biblioteca(s): 	Embrapa Arroz e Feijão; Embrapa Unidades Centrais.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 2	
Data corrente: 	05/12/2012	
Data da última atualização: 	16/09/2022	
Autoria: 	ALVAREZ, R. de C. F.; CRUSCIOL, C. A. C.; NASCENTE, A. S.; RODRIGUES, J. D.; HABERMANN, G.	
Afiliação: 	RITA DE CÁSSIA FÉLIX ALVAREZ, UNIVERSIDADE FEDERAL DE MATO GROSSO DO SUL; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP, Botucatu-SP; ADRIANO STEPHAN NASCENTE, CNPAF; JOÃO DOMINGOS RODRIGUES, UNESP, Botucatu-SP; GUSTAVO HABERMANN, UNESP, Rio Claro-SP.	
Título: 	Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, v. 47, n. 10, p. 1455-1461, out. 2012.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to evaluate gas exchange rates, plant height, yield components, and productivity of upland rice, as affected by type and application time of plant growth regulators. A randomized block design, in a 4x2 factorial arrangement, with four replicates was used. Treatments consisted of three growth regulators (mepiquat chloride, trinexapac.ethyl, and paclobutrazol), besides a control treatment applied at two different phenological stages: early tillering or panicle primordial differentiation. The experiment was performed under sprinkler.irrigated field conditions. Net CO2 assimilation, stomatal conductance, plant transpiration, and water.use efficiency were measured four times in Primavera upland rice cultivar, between booting and milky grain phenophases. Gas exchange rates were neither influenced by growth regulators nor by application time. There was, however, interaction between these factors on the other variables. Application of trinexapac.ethyl at both tillering and differentiation stages reduced plant height and negatively affected yield components and rice productivity. However, paclobutrazol and mepiquat chloride applied at tillering, reduced plant height without affecting rice yield. Mepiquat chloride acted as a growth stimulator when applied at the differentiation stage, and significantly increased plant height, panicle number, and grain yield of upland rice.	
Palavras-Chave: 	Condutância estomática; Eficiência de uso da água; Estatura da planta; Net photosynthesis; Water?use efficiency.	
Thesagro: 	Arroz; Estatura de planta; Fotossíntese; Gas; Oryza Sativa; Transpiração vegetal.	
Thesaurus Nal: 	Stomatal conductance; Transpiration.	
Categoria do assunto: 	--
F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/71475/1/gas.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (31705-1) - UPC - AP - PP - 2012 -  - 2012 - DIS
AI-SEDE - (54514-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS