Glycine-betaine in wilted barley reduces the effects of gramine on aphids
Professor Advisor
dc.contributor.advisor
Author
dc.contributor.author
Zúñiga Navarro, Gustavo
Author
dc.contributor.author
Corcuera, Luis
Admission date
dc.date.accessioned
2018-12-20T14:11:50Z
Available date
dc.date.available
2018-12-20T14:11:50Z
Publication date
dc.date.issued
1987
Cita de ítem
dc.identifier.citation
Phytochemistry, Vol. 26, No. 12, pp. 3197-3200, 1987.
Identifier
dc.identifier.issn
00319422
Identifier
dc.identifier.other
10.1016/S0031-9422(00)82469-3
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/154672
Abstract
dc.description.abstract
The gramine content in different barley cultivars was not changed under water stress. Proline and glycine-betaine increased as plant water potential decreased. The population growth rate of the aphids Schizaphis graminum and Rhopalosiphum padi were increased in plants with higher glycine-betaine/gramine ratio. When the aphids were fed with artificial diets with different ratios of glycine-betaine/gramine, the survival of aphids increased in proportion to the glycine-betaine content in the diets. Proline had no effect on the survival of aphids. The LD50 of gramine was 0.8 and 4.1 mM when 0 and 12 mM glycine-betaine were added to the diets. These results suggest that glycine-betaine accumulation due to water stress may reduce the harmful effects of gramine on the aphids S. graminum and R. padi