The Triticeae as sources of hydroxamic acids, secondary metabolites in wheat conferring resistance against aphids

Niemeyer, Hermann M.; Copaja, Sylvia V.; Barria, Bernardita N.

doi:10.1111/j.1601-5223.1992.tb00158.x

Cited by 33 publications

(12 citation statements)

References 44 publications

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“…Mulch quantities obtained from the eight rye cultivars and the triticale cultivar (Trimaran) applied per pot before the sowing of the four warm-season weeds, and relative total quantities of benzoxazinoids 2,4-dihydroxy-1,4 (2H)-benzoxazin-3-one (DIBOA) and benzoxazolin-2(3H)-one (BOA). Niemeyer et al (1992), triticale does not contain benzoxazinoids, at least regarding the cv. Trimaran and in the experimental conditions described.…”

Section: Resultsmentioning

confidence: 98%

“…The present study, conducted in a greenhouse, aimed to examine the content of DIBOA and BOA in eight of the most recent and readily-available rye cultivars on the Italian market and to study the effect of mulches on four warm-season weeds. Since Niemeyer et al (1992) reported on the presence of DIBOA in triticale, it was decided to grow one cultivar of triticale used in the Po plain together with the eight cultivars of rye.…”

Section: Introductionmentioning

confidence: 99%

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Alternative weed control using the allelopathic effect of natural benzoxazinoids from rye mulch

Tabaglio¹,

Gavazzi²,

Schulz³

et al. 2008

Agron. Sustain. Dev.

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In conventional agriculture, weed control by herbicides is an expensive practice and can also have a negative effect on the environment. Allelopathy permits sustainable weed management while reducing the impact of agriculture on the environment. We studied the content of 2,4-dihydroxy-1,4 (2H)-benzoxazin-3-one (DIBOA) and benzoxazolin-2(3H)-one (BOA), indicated as benzoxazinoids and considered effective for weed control, in 8 cultivars of rye and 1 of triticale grown in a greenhouse. We also tested the ability of mulches to inhibit the germination of four warm-season weeds. Our results show that all rye cultivars produced DIBOA, while BOA was found only in four of them. Benzoxazinoids were absent in triticale. Total benzoxazinoid content ranged from 177 to 545 µg g −1 and was statistically different among cultivars. Rye mulches were not able to suppress velvetleaf and common lambsquarters seedlings, while redroot pigweed and common purslane were significantly affected. Weed suppression ranged from 40% to 52% for redroot pigweed and from 40% to 74% for common purslane. The inhibitory activity of triticale mulch was observed only for common purslane, with a suppression percentage of 33%. No correlation was found between total benzoxazinoid content and the number of weed seedlings suppressed, with R 2 of 0.076 for redroot pigweed and R 2 of 0.003 for common purslane, indicating that benzoxazinoids are not the only source of phytotoxicity. allelopathy / BOA / DIBOA / integrated weed control / mulch / rye / triticale

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Alternative weed control using the allelopathic effect of natural benzoxazinoids from rye mulch

Tabaglio¹,

Gavazzi²,

Schulz³

et al. 2008

Agron. Sustain. Dev.

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“…Aegilops speltoides is the most infested species. At the seedling stage this species contains a high amount of hydroxamic acids (Niemeyer et al, ), which is responsible for its high resistance to cereal aphids. Our results differ probably because of evaluation at a later stage of plant development, between flowering and fruiting.…”

Section: Resultsmentioning

confidence: 99%

Aegilops conservation and collection evaluation in the Czech Republic

Holubec

Hanzalová

Dumalasová

et al. 2014

J of Sytematics Evolution

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Aegilops distribution was revised on localities in the territory of the Czech Republic and the former Czechoslovakia, based on herbarium data, literature and floristic databases. The only surviving species Ae. cylindrica forms the northern limit of distribution in the Danube basin, other sites are secondary. In situ conservation was proposed for two Czech sites where Aegilops have been naturalized. An ex situ gene bank collection has been maintained in the Gene Bank Prague since 1985. The collection includes 21 species and 1099 accessions. The whole collection was evaluated for breeding-valuable characters: resistance to leaf diseases, cereal aphids, viral diseases, and qualitative parameters. Recently, the collection was retested for the present races of leaf and stem rust including new introductions from Kazakhstan. Six different leaf rust races and five different stem rust races collected from the Czech Republic were applied in the older tests, and three races from each rust species in the recent tests. The highest number of accessions resistant both to wheat leaf rust and wheat stem rust and powdery mildew was found in Ae. speltoides (90%). Different reactions of individual accessions of the tested species to the three different pathotypes of each rust species indicates that several diverse genes for specific resistance are present in the accessions of the tested species.

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“…These genes are located in chromosomes 4 and 5 of the three wheat genomes, and are involved in catalyzing the hydroxylation and ring expansion of indole-3-glycerol phosphate to synthesize DIBOA and DIMBOA (Frey et al 1997;Nomura et al 2003). Both DIBOA and DIMBOA are present in hexaploid wheat, however, only the latter appears to be present in high concentrations (Niemeyer et al 1992). Niemeyer et al (1992) found that the ancestor of A and D genomes of hexaploid wheat possesses low concentrations of hx, whereas Aegilops speltoides Tausch, the most likely donor of the B genome, and tetraploid wheat (AABB) possess high concentrations of DIMBOA, suggesting that the B genome is responsible for the main part of the synthesis of hx in hexaploid wheat.…”

Section: Discussionmentioning

confidence: 99%

“…Both DIBOA and DIMBOA are present in hexaploid wheat, however, only the latter appears to be present in high concentrations (Niemeyer et al 1992). Niemeyer et al (1992) found that the ancestor of A and D genomes of hexaploid wheat possesses low concentrations of hx, whereas Aegilops speltoides Tausch, the most likely donor of the B genome, and tetraploid wheat (AABB) possess high concentrations of DIMBOA, suggesting that the B genome is responsible for the main part of the synthesis of hx in hexaploid wheat. From our results is not possible determine whether Rp1 is associated or not to Tbx genes, but it would be of great interest to analyze DIMBOA concentrations in the population.…”

Section: Discussionmentioning

confidence: 99%

Mapping resistance to the bird cherry-oat aphid and the greenbug in wheat using sequence-based genotyping

et al. 2014

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The Triticeae as sources of hydroxamic acids, secondary metabolites in wheat conferring resistance against aphids

Abstract: NIEMEYER, H. M., COPAJA, s. V. and BARRIA, B. N. 1992. The Triticeae as sources of hydroxdmic acids, secondary metabolites in wheat conferring resistance against aphids. ~ Hereditas 116: 295-299. Lund, Sweden.

Cited by 33 publications

References 44 publications

Alternative weed control using the allelopathic effect of natural benzoxazinoids from rye mulch

Alternative weed control using the allelopathic effect of natural benzoxazinoids from rye mulch

Aegilops conservation and collection evaluation in the Czech Republic

Mapping resistance to the bird cherry-oat aphid and the greenbug in wheat using sequence-based genotyping

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