Data/hora: 02/06/2024 07:15:32

Biblioteca(s): | Embrapa Gado de Leite; Embrapa Trigo.
Data corrente: | 14/11/2017
Data da última atualização: | 21/09/2023
Autoria: | PEREIRA, J. F.; SARRIA, A. L. F.; POWERS, S. J.; ARADOTTIR, G. I.; CAULFIELD, J. C.; MARTIN, J.; SMART, L. E.; PICKETT, J. A.; BIRKETT, M. A.; PEREIRA, P. R. V. da S.
Afiliação: | JORGE FERNANDO PEREIRA, CNPGL; ANDRE L. F. SARRIA, ROTHAMSTED RESEARCH; STEPHEN J. POWERS, ROTHAMSTED RESEARCH; GUDBJORG I. ARADOTTIR, ROTHAMSTED RESEARCH; JOHN C. CAULFIELD, ROTHAMSTED RESEARCH; JANET MARTIN, ROTHAMSTED RESEARCH; LESLEY E. SMART, ROTHAMSTED RESEARCH; JOHN A. PICKETT, ROTHAMSTED RESEARCH; MICHAEL A. BIRKETT, ROTHAMSTED RESEARCH; PAULO ROBERTO VALLE DA S PEREIRA, CNPT.
Título: | DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae.
Ano de publicação: | 2017
Fonte/Imprenta: | Theoretical and Experimental Plant Physiology, Campo dos Goytacazes, v. 29, n. 2, p. 61-75, June 2017.
DOI: | 10.1007/s40626-017-0084-z
Idioma: | Inglês
Conteúdo: | Abstract The objective of this study was to evaluate the natural levels of the plant defence compound DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) in young leaves of eight hexaploid Brazilian wheat genotypes and the impact of the genotypes upon development of cereal aphids, Rhopalosiphum padi and Sitobion avenae. HPLC analysis revealed that the DIMBOA levels varied from 5.376 (in BRS Guabiju) to 30.651 mmol kg FW-1 (in BRS Timbaúva) with two genotypes outperforming Solstice, a UK variety used as reference. Bioassays were conducted to evaluate the development and fecundity of both aphids when grown on the wheat genotypes. Although BRS Guabiju and BRS Timbaúva were among the genotypes showing the highest susceptibility and resistance, respectively, against both aphid species, no correlation could be found between DIMBOA levels and antibiosis effects. The cultivar BRS 327 was among the genotypes showing lower intrinsic rate of population increase for the two aphid species. Elucidating the role of secondary metabolites in plant resistance to aphids and the characterization of the genotypes that allowed reduced development of R. padi and S. avenae are important steps to achieve a better natural resistance in hexaploid Brazilian wheat.
Palavras-Chave: | Ácidos hidroxâmicos.
Thesagro: | Afídeo; Trigo.
Thesaurus Nal: | Aphidoidea; High performance liquid chromatography; Hydroxamic acids; Wheat.
Categoria do assunto: | G Melhoramento Genético
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/166734/1/ID44167-2017v29n2p61TheorExpPlantPhysiol.pdf
Registro original: | Embrapa Gado de Leite (CNPGL)

Exemplares:

CNPT - (44167-1) - UPC - AP - DD -  -  -  - DIS
CNPGL - (23843-1) - UPC - AP - DD -  -  -  - DIS