A screen of worldwide wheat cultivars for hydroxamic acid levels and aphid antixenosis

Nicol, D.; Copaja, Sylvia V.; Wratten, Stephen D.; Niemeyer, Hermann M.

doi:10.1111/j.1744-7348.1992.tb03982.x

Cited by 72 publications

(53 citation statements)

References 21 publications

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“…The hydrox-amic acid concentrations in six wheat cultivars can explain a higher proportion of the variation in aphid performance (Thackray et al 1990) and strong corre-lations between the intrinsic rate of population increase of S. avenae and hydroxamic acid levels were also found (Bohidar et al 1986;Wratten et al 1988). Highly significant correlations between S. avenae preference and DIMBOA levels in the seedlings of a worldwide range of 47 cultivars of Triticum were also found by Nicol et al (1992). Higher DIMBOA concentration in flag leaves in comparison to ears at anthesis was consistent with the higher MRGR of S. avenae in ears than in flag leaves (Nicol and Wratten 1997).…”

Section: Discussionsupporting

confidence: 61%

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

Pereira

Sarria

Powers

et al. 2017

Theor. Exp. Plant Physiol.

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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 Timbau´va 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.

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Section: Discussionsupporting

confidence: 61%

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

Pereira

Sarria

Powers

et al. 2017

Theor. Exp. Plant Physiol.

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“…In order to explore a chemically-mediated mechanism associated with sieve element salivation, we studied the feeding behaviour of the aphid Sitobion fragariae (Walker) on two cultivars of wheat, T. aestivum, varying in their content of hydroxamic acids (Hx), with special emphasis on EPG parameters related to salivation in sieve elements. Several investigations on Hx have addressed their role in the resistance of wheat against aphids (Niemeyer, 1990;Nicol et al, 1992;Givovich et al, 1994;Mayoral et al, 1996, Nicol & Wratten, 1997.…”

Section: Introductionmentioning

confidence: 99%

Salivation into sieve elements in relation to plant chemistry: the case of the aphid Sitobion fragariae and the wheat, Triticum aestivum

Ramı́rez

Niemeyer

1999

Entomologia Exp Applicata

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Extended sieve element salivation (E1 waveform in the electrical penetration graph) is a characteristic activity during early sieve element punctures, particularly in resistant plants. In order to explore a chemically-mediated mechanism of resistance associated with sieve element salivation, we compared the pattern of feeding behaviour of the aphid, Sitobion fragariae (Walker), on two cultivars of the wheat Triticum aestivum L., with different concentrations of hydroxamic acids (Hx). During 24 h of electronic monitoring, aphids dedicated over 50% of the total time to phloem ingestion from the sieve elements. Total time allocated to E1 in the experiment, time to first E1 within the experiment, time allocated to E1 before a sustained phloem ingestion (E2) and the contribution of sieve element salivation to the phloem phase (E1/[E1+E2]) were significantly higher in the high-Hx cultivar. The increased salivation in plants with higher contents of Hx suggests the existence, at least in this system, of a chemically-mediated sieve element constraint.

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“…The varietal differences in allelopathy in wheat may be attributed to the difference in DIMBOA production in different wheat varieties. The concentration of DIMBOA ranged from 1.4 to 10.9 mmol kg -1 fresh weight in 52 Chilean wheat varieties (Copaja et al, 1991), and from 0.99 to 8.07 mmol kg -1 fresh weight in a worldwide collection of 47 wheat varieties (Nicol et al, 1992). The study concludes that wheat exhibit allelopathic potential against parthenium weed.…”

Section: Soil Amendment Bioassaymentioning

confidence: 83%

Management of parthenium weed by extracts and residue of wheat

Jabeen¹,

Samad²,

Javaid³

2011

Afr. J. Biotechnol.

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This study was carried out to investigate the prospects of using methanolic extracts and residue of wheat (Triticum aestivum L.) for the management of parthenium (Parthenium hysterophorus L.), one of the world's worst weeds. In a laboratory bioassay, the effect of methanol extracts of 1, 2, 3, 4 and 5% (w/v) concentrations of four wheat varieties namely: AS 2002, Inqalab 91, Ufaq and Uqab was studied against the germination and seedling growth of parthenium. Extracts of all the four wheat varieties suppressed germination as well as root and shoot growth of the seedlings. In soil amendment bioassay, dried and chopped wheat straw of the four test wheat varieties was thoroughly mixed in pot soil at 0.5, 1.0 and 1.5% (w/w). Pots were irrigated with tap water and left for one week followed by sowing of seeds in these pots. The effect of residue incorporation of all the wheat cultivars was insignificant on germination of parthenium seeds. However, all the residue incorporation treatments significantly reduced the survival percentage of the parthenium seedlings. Root and shoot growth in terms of length, and fresh and dry biomass were also significantly suppressed by residues of all the four test wheat cultivars. This study concludes that parthenium weed can effectively be managed by amending the soil with wheat residue.

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A screen of worldwide wheat cultivars for hydroxamic acid levels and aphid antixenosis

Cited by 72 publications

References 21 publications

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

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

Salivation into sieve elements in relation to plant chemistry: the case of the aphid Sitobion fragariae and the wheat, Triticum aestivum

Management of parthenium weed by extracts and residue of wheat

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