Data/hora: 12/05/2024 17:28:43

Biblioteca(s): | Epagri-Sede.
Data corrente: | 10/10/2014
Data da última atualização: | 10/10/2014
Autoria: | MARTINI, L. F. D.; BURGOS, N. R.; NOLDIN, J. A.; AVILA, L. A.
Título: | Absorption, translocation and metabolism of  BISPYRIBAC-SODIUM on rice seedlings under cold stress.
Ano de publicação: | 2014
Fonte/Imprenta: | In: CONGRESSO BRASILEIRO DA CIÊNCIA DAS PLANTAS DANINHAS, 29., 2014, Gramado, RS. Anais... Londrina, PR: Sociedade Brasileira da Ciência das Plantas Daninhas, 2014.
Idioma: | Português
Conteúdo: | Rice production is highly affected by weed competition. The efficacy of chemical weed control and crop safety, as well its crop selectivity, is a function of absorption, translocation and metabolism of herbicides. This study investigates the effect of cold stress 22/16C (day/night) on absorption, translocation and metabolism of 14C-bispyribac-sodium on rice seedlings. Maximum 14C-bispyribac-sodium absorption occurred at 24 HAT and was stimulated by the warm 30/22C (day/night) temperature. A large amount of total absorbed herbicide was retained on the treated leaf, indicating that bispyribac-sodium had lower translocation to other plant parts. Injury on rice plants was enhanced by exposure to cold, emphasizing the negative effect on herbicide metabolism. Cold-grown plants had higher recovery of the parent herbicide than plants grown at a warm temperature. Moreover, warm grown plants showed a greater amount of metabolite B compared to cold grown plants.
Palavras-Chave: | Arroz; herbicide selectivity; injury; low temperature; P450-monooxygenase.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_34947.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (96998-1) - UPC - AP - DD -  -  -  - DIS