DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae

A - Papers appearing in refereed journals

Periera J. F., Sarria, A. L. F., Powers, S. J., Aradottir, G. I., Caulfield, J. C., Martin, J. L., Smart, L. E., Pickett, J. A., Birkett, M. A. and Pereira, P. V. R .S 2017. DIMBOA levels in hexaploid Brazilian wheat are not associated with antibiosis against the cereal aphids Rhopalosiphum padi and Sitobion avenae. Theoretical and Experimental Plant Physiology. 29 (2), pp. 61-75.

AuthorsPeriera J. F., Sarria, A. L. F., Powers, S. J., Aradottir, G. I., Caulfield, J. C., Martin, J. L., Smart, L. E., Pickett, J. A., Birkett, M. A. and Pereira, P. V. R .S
Abstract

The objective of this study was to evaluate the natural levels of the plant defence compound DIMBOA 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/kgFW (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 and lowest susceptibility respectively, against both aphids, no correlation could be found between DIMBOA levels and antibiosis effects. The cultivar BRS 327 that 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 characterisation of the genotypes that allowed reduced aphid development are important steps to achieve a better natural resistance in hexaploid Brazilian wheat.

KeywordsAphid development ; Artificial feeding assay; HPLC; Hydroxamic acids; Plant resistance; Triticum aestivum
Year of Publication2017
JournalTheoretical and Experimental Plant Physiology
Journal citation29 (2), pp. 61-75
Digital Object Identifier (DOI)doi:10.1007/s40626-017-0084-z
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeUK-Brazil Partnering Award for Developing New Aphid Resistance in Wheat
Sustainability
Output statusPublished
Publication dates
Online25 May 2017
Publication process dates
Accepted11 May 2017
PublisherBrazilian Soc Plant Physiology
Copyright licenseCC BY
ISSN2197-0025

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