title: Changes in Lupinus albus and Lupinus angustifolius alkaloid profiles in response to mechanical damage.
abstract: The aim of this work was to evaluate chemical responses to biomass removal mimicking large herbivore action in Lupinus albus and Lupinus angustifolius aerial parts. GC and GC-MS were used to determine total alkaloid content (TAC) and alkaloid relative abundances in bitter and sweet varieties of each species. Bitter genotypes Vila vehla (Vv; 3.95 +/- 0.26 mg/g of DM) and El Harrach (EH; 3.99 +/- 0.19 mg/g of DM) showed after damage 22 and 32.8% TAC increases, respectively. Even sweet varieties, with very low alkaloid contents, Gungurru (Gu; 0.51 +/- 0.09 mg/g of DM) and Rumbo (Ru; 0.53 +/- 0.09 mg/g of DM) exhibited higher induced responses of 58.8 and 67.9%, respectively, and their final TAC values remained low, distinctly apart from those corresponding to bitter species. Moreover, minor components such as ammodendrine, reported to exhibit teratogenic potential, showed no significant changes in their relative abundances in response to biomass removal in these genotypes.
authors.affiliation: Departamento de Biologia Aplicada y Alimentos, Catedra de Quimica de Biomoleculas, Universidad de Buenos Aires, C1417DSE Buenos Aires, Argentina.
authors.forename: Hugo Daniel
authors.initials: HD
authors.lastname: Chludil
authors.forename: María Del Pilar
authors.initials: Mdel P
authors.lastname: Vilariño
authors.forename: María Luz
authors.initials: ML
authors.lastname: Franco
authors.forename: Silvia Rosa
authors.initials: SR
authors.lastname: Leicach
mesh_terms: D000470:Alkaloids / Q000032:analysis* / Q000633:toxicity; D018533:Biomass; D002849:Chromatography, Gas; D005838:Genotype; D031297:Lupinus / Q000737:chemistry* / Q000235:genetics / Q000502:physiology*; D013058:Mass Spectrometry; D013045:Species Specificity
chemical_list: D000470:Alkaloids