Effects of saponin-rich quinoa (Chenopodium quinoa Willd.) bran and bran extract in diets of adapted and non-adapted quinoa pests in laboratory bioassays

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dc.catalogadorpau
dc.contributor.authorMcCartney, Nathaniel B.
dc.contributor.authorAhumada, María Isabel
dc.contributor.authorMuñoz, Marcela P.
dc.contributor.authorRosales Villavicencio, Inés Marlene
dc.contributor.authorChorbadjian Alonso, Rodrigo Armen
dc.contributor.authorFierro, Angélica M.
dc.date.accessioned2024-01-10T12:36:56Z
dc.date.available2024-01-10T12:36:56Z
dc.date.issued2019
dc.description.abstract© 2019, Pontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal. All rights reserved.Quinoa (Chenopodium quinoa Willd.) produces bitter-tasting triterpene saponins that must be removed prior to consumption, significantly adding to production costs. Breeders have therefore prioritized the development of low-saponin “sweet” cultivars with little concern for the ecological benefits these compounds may confer. Quinoa saponins are thought to provide protection against herbivores and microbial pathogens, although there is very little data to support these assumptions. Here we begin to address the question of whether biologically relevant concentrations of saponins exert negative effects against insects and pathogens that attack quinoa, as well as against species not associated with quinoa. Using bran of the coastal genotype Cáhuil as the source of saponins, we conducted feeding assays with larvae of 3 noctuid insect species. Antifungal activity against 8 species was assayed using bran extract incorporated into PDA media. Quinoa bran showed insecticidal activity against only the non-quinoa feeder Pseudaletia impuncta, while the quinoa feeders Trichoplusia ni and Feltia subterranea were not affected. The bran extract inhibited fungal colony growth of Alternaria arborescens, Botrytis cinerea, and Phytophthora cinnamomi by approximately 50% but had less growth inhibitory effect on Fusarium oxysporum f. sp. cepae, Pestalotiopsis clavispora, Penicillium digitatum, Geotrichum sp., and the quinoa pathogen Phoma sp. The relatively higher inhibitory activity against some pathogen species did not necessarily correlate with their expected pathogenicity against quinoa. The results of this study suggest that, while the quinoa saponins present in bran and bran extracts may provide some protection against certain insects and phytopathogens, species-specific responses need further exploration.
dc.description.funderConcurso de Investigación Interdisciplinaria
dc.description.funderPontificia Universidad Católica de Chile
dc.fechaingreso.objetodigital2024-06-07
dc.fuente.origenScopus
dc.identifier.doi10.7764/rcia.v45i2.2159
dc.identifier.eissn0718-1620
dc.identifier.issn0304-5609
dc.identifier.scopusidSCOPUS_ID:85073559087
dc.identifier.urihttps://doi.org/10.7764/rcia.v45i2.2159
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76693
dc.information.autorucFacultad de Agronomía e Ingeniería Forestal; McCartney, Nathaniel B.; S/I; 1064203
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Ahumada, María Isabel; S/I; 178739
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Muñoz, Marcela P.; S/I; 1013973
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Rosales Villavicencio, Inés Marlene; 0000-0001-7898-4319; 1009721
dc.information.autorucFacultad de Agronomía e Ingenieria Forestal; Chorbadjian Alonso, Rodrigo Armen; 0000-0001-8664-1770; 3250
dc.issue.numero2
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final136
dc.pagina.inicio125
dc.publisherPontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal
dc.revistaCiencia e Investigacion Agraria
dc.rightsacceso abierto
dc.subjectAntifungal
dc.subjectFungus
dc.subjectHerbivory
dc.subjectInsect
dc.subjectNoctuidae
dc.subjectOomycete
dc.titleEffects of saponin-rich quinoa (Chenopodium quinoa Willd.) bran and bran extract in diets of adapted and non-adapted quinoa pests in laboratory bioassays
dc.typeartículo
dc.volumen46
sipa.codpersvinculados1064203
sipa.codpersvinculados178739
sipa.codpersvinculados1013973
sipa.codpersvinculados1009721
sipa.codpersvinculados3250
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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