Response mechanisms of Brachiaria brizantha cultivars to water deficit stress.

Vista sencilla de ítem
dc.contributorPATRICIA MENEZES SANTOS, CPPSE; PEDRO GOMES DA CRUZ; LEANDRO COELHO DE ARAUJO; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; CACILDA BORGES DO VALLE, CNPGC; CRISTIANA DE GASPARI PEZZOPANE.
dc.creatorSANTOS, P. M.
dc.creatorCRUZ, P. G.
dc.creatorARAUJO, L. C. de
dc.creatorPEZZOPANE, J. R. M.
dc.creatorVALLE, C. B. do
dc.creatorPEZZOPANE, C. de G.
dc.date2013-10-23T11:11:11Z
dc.date2013-10-23T11:11:11Z
dc.date2013-10-23
dc.date2013
dc.date2016-02-26T11:11:11Z
dc.date.accessioned2026-07-07T05:21:25Z
dc.descriptionTwo cultivars of Brachiaria brizantha (Hochst ex. A. Rich) Stapf. (Syn. Urochloa) were evaluated for their adaptation to water deficit and the stress response mechanisms in a greenhouse experiment. The experimental design was in completely randomized blocks with a 2 × 2 × 4 factorial arrangement. The Marandu and BRS Piatã cultivars were evaluated under two water availability conditions, with or without water restriction. The harvests were carried out 0, 7, 14 and 28 days after the start of water restriction. For both cultivars, the water deficit stress caused a reduction in shoot biomass and leaf area and an increase in the percentage of roots in the deeper soil layers. The B. brizantha cv. Marandu reached critical levels of leaf water potential in a shorter period of water restriction than did the B. brizantha cv. BRS Piatã. The osmoregulation and deepening of the root system are mechanisms of adaptation to water stress observed in both Marandu and BRS Piatã cultivars. Besides that, the Marandu cultivar also increases its leaf senescence and, consequentially, decreases its leaf area, as a response to water deficit.
dc.identifierRevista Brasileira de Zootecnia, v. 42, n. 11, p. 767-773, nov. 2013.
dc.identifier1806-9290
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/969242
dc.identifierhttps://doi.org/10.1590/S1516-35982013001100001
dc.identifier.urihttp://hdl.handle.net/123456789/488414
dc.languageeng
dc.rightsopenAccess
dc.subjectBRS Piatã
dc.subjectMarandu
dc.subjectOsmotic potential
dc.subjectWater availability
dc.subjectwater potential
dc.titleResponse mechanisms of Brachiaria brizantha cultivars to water deficit stress.
dc.typeArtigo de periódico

Archivos

Colecciones

Embrapa Pecuaria Sudeste (CPPSE)