Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators.

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dc.contributorRITA 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.
dc.creatorALVAREZ, R. de C. F.
dc.creatorCRUSCIOL, C. A. C.
dc.creatorNASCENTE, A. S.
dc.creatorRODRIGUES, J. D.
dc.creatorHABERMANN, G.
dc.date2012-12-05T11:11:11Z
dc.date2012-12-05T11:11:11Z
dc.date2012-12-05
dc.date2012
dc.date2012-12-05T11:11:11Z
dc.date.accessioned2026-06-30T23:58:49Z
dc.descriptionThe 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.
dc.identifierPesquisa Agropecuária Brasileira, v. 47, n. 10, p. 1455-1461, out. 2012.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/941332
dc.identifier.urihttp://hdl.handle.net/123456789/394606
dc.languageeng
dc.rightsopenAccess
dc.subjectCondutância estomática
dc.subjectEstatura da planta
dc.subjectArroz
dc.subjectOryza sativa
dc.subjectTranspiração vegetal
dc.subjectFotossíntese
dc.subjectGas
dc.titleGas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators.
dc.typeArtigo de periódico

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