Role of glucosinolates in insect-plant relationships and multitrophic interactions.

Department of Ecology, Swedish University of Agricultural Sciences, Uppsala S-750 07, Sweden.
Annual Review of Entomology (Impact Factor: 13.59). 10/2008; 54:57-83. DOI: 10.1146/annurev.ento.54.110807.090623
Source: PubMed

ABSTRACT Glucosinolates present classical examples of plant compounds affecting insect-plant interactions. They are found mainly in the family Brassicaceae, which includes several important crops. More than 120 different glucosinolates are known. The enzyme myrosinase, which is stored in specialized plant cells, converts glucosinolates to the toxic isothiocyanates. Insect herbivores may reduce the toxicity of glucosinolates and their products by excretion, detoxification, or behavioral adaptations. Glucosinolates also affect higher trophic levels, via reduced host or prey quality or because specialist herbivores may sequester glucosinolates for their own defense. There is substantial quantitative and qualitative variation between plant genotypes, tissues, and ontogenetic stages, which poses specific challenges to insect herbivores. Even though glucosinolates are constitutive defenses, their levels are influenced by abiotic and biotic factors including insect damage. Plant breeders may use knowledge on glucosinolates to increase insect resistance in Brassica crops. State-of-the-art techniques, such as mutant analysis and metabolomics, are necessary to identify the exact role of glucosinolates.

  • Source
    New Phytologist 06/2014; 202(4):1098-100. · 6.74 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Brassica vegetables contain a class of secondary metabolites, the glucosinolates (GS), whose specific degradation products determine the characteristic flavor and smell. While some of the respective degradation products of particular GS are recognized as health promoting substances for humans, recent studies also show evidence that namely the 1-methoxy-indol-3-ylmethyl GS might be deleterious by forming characteristic DNA adducts. Therefore, a deeper knowledge of aspects involved in the biosynthesis of indole GS is crucial to design vegetables with an improved secondary metabolite profile.
    BMC Plant Biology 05/2014; 14(1):124. · 4.35 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Profile and distribution of glucosinolates (GLS) were detected in plant tissues of horseradish (Armoracia rusticana) at different developmental stages: beginning of vegetative re-growth, flowering and silique formation. The GLS profile varied widely in the different tissues: we identified 17 GLS in roots and sprouts, one of which was not previously characterized in horseradish, i.e. the glucobarbarin, 11 already found in the roots, including the putative 2-methylsulfonyl-oxoethyl-GLS, and 5 previously recognized only in the sprouts. Fifteen of those GLS were also identified in young and cauline leaves, 12 in the mature leaves and 13 in the inflorescences. No difference in GLS profile was observed in plant among the phenological stages. From a quantitative point of view sprouts, while showing the same profile, were much richer in GLS than roots at the beginning of vegetative re-growth, having the highest total GLS concentrations (117.5 and 7.7 μmol g-1 dry weight in sprouts and roots, respectively). During flowering and silique forming stages, the roots still maintained lower amount of total GLS (7.4 μmol g-1 of dry weight, on average) with respect to the epigeous tissues, in which mature and young leaves showed the highest total concentrations (70.5 and 73.8 μmol g-1 of dry weight on average, respectively). Regardless of the phenological stages, the aliphatic GLS were always predominant in all tissues (95%) followed by indolic (2.6%) and aromatic (2.4%) GLS. Sinigrin contributed more than 90% of the total GLS concentration. Aliphatic GLS concentrations were much higher in the epigeous tissues, particularly in the mature and young leaves, while aromatic and indolic GLS concentrations were higher in the roots. Through the phenological stages, GLS concentration increased in young and mature leaves and decreased in cauline leaves and inflorescences, while it remained constant over time in roots.
    Phytochemistry 07/2014; · 3.05 Impact Factor


Available from
May 20, 2014