Volatile constituents from cauliflower and other crucifers

Wallbank, Barry E.; Wheatley, G. A.

doi:10.1016/s0031-9422(00)94438-8

Cited by 61 publications

(28 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A comparison of the compounds detected with SBSE in cabbage extracts to previous studies on the headspace of cabbage plants (Blaakmeer et al 1994;Geervliet et al 1997;Mattiacci et al 1994) shows that some of the compounds detected in the extract were not found in previous studies. In particular, four benzene derivatives (1,3-dimethylbenzene, 1,2-dimethylbenzene, 2-ethyltoluene and 1,2,3-trimethylbenzene, all of them not found in the blank) resultant from shikimic acid (Torssell, 1997) have never been identified in cabbage or cruciferous plants before (Wallbank & Wheatley 1976;Cole 1980b;McEwan & Smith 1998). Several combinations of these aromatics have been detected in solvent extracts of Japanese mugwort leaf (Umano et al 2000), crushed guava fruit (Vernin et al 1998), and peach fruit (Sumitani et al 1994), altough it can not be excluded that they are air pollutants.…”

Section: Discussionmentioning

confidence: 99%

New insights in analysing parasitoid attracting synomones: early volatile emission and use of stir bar sorptive extraction

et al. 2005

View full text Add to dashboard Cite

Summary. It is well known that feeding by Pieris brassicae caterpillars on cabbage leaves triggers the release of volatiles that attract natural antagonists such as the parasitoid Cotesia glomerata. The temporal dynamics in the emissions of parasitoid attracting volatiles has never been elucidated in this system. In a time course experiment, caterpillar infested leaves attracted the parasitoid within one hour after infestation. At such an early stage of infestation, as much as fifty percent of the parasitoids flew towards the infested plant in a wind tunnel bioassay, while only five percent flew towards the non-infested control plant. Three hours after infestation and later, the response to the volatiles from the infested plant reached its maximum and then continued at a constantly high level for the remaining 14 hours of the experiment. Chemical analyses of volatiles collected from infested leaves at short time intervals during the first 24 hours identified a total of ten compounds, comprising green leaf volatiles, terpenoids, and a nitrile. Significant increase of emission within the first 5 hours following initial herbivory was detected for (Z)-3-hexen-1-ol, (Z)-3-hexen-1-yl acetate, cineole and benzylcyanide. Subsequently, a coupled bioassay-chemical analysis procedure was developed allowing for testing and analyzing the same sample for future identification of the bioactive compounds. This was achieved by using stir bar sorptive extraction for the analysis of solvent extracts of caterpillar-damaged leaves.

show abstract

Section: Discussionmentioning

confidence: 99%

New insights in analysing parasitoid attracting synomones: early volatile emission and use of stir bar sorptive extraction

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Trans-2-hexenat isolated from oak leaves, is an incitant for the "calling" behaviour of female General "green leaf"volatile components in and between different plant species, as influenced by the expression of the enzymes involved. The predominant vapour component of several cruciferous species is cis-3-hexenylacetate, while cis-3-hexen-l-ol and hexylacetate are minor constituents and trans-2-hexenal is absent (Wallbank, 1972;Wallbank & Wheatley, 1976). In this way the cruciferous "green odour" contrasts with the potato "green odour", and accordingly different modalities, or qualities, are conferred on the "green odours" of diverse plant species.…”

Section: General Green Leaf Volatilesmentioning

confidence: 99%

GENERAL GREEN LEAF VOLATILES IN THE OLFACTORY ORIENTATION OF THE COLORADO BEETLE, LEPTINOTARSA DECEMLINEATA

Visser

Avé

1978

Entomologia Exp Applicata

262

133

View full text Add to dashboard Cite

The odour of fully grown potato plants elicits a positive anemotactic response in Colorado beetles, but none of the individual component volatiles alone is attractive. Certain component chemicals or isomers of them disrupt orientation to the host plant, probably by changing the relative proportion of the odour components. These general green leaf volatiles probably occur as important constituants of leaf odours attractive to various phytophagous insects. Such a complex represents “green odour” and confers different modalities on the leaf odours of diverse plant species. RÉSUMÉ SUBSTANCES VOLATILES DES FEUILLES VERTES ET ORIENTATION OLFACTIVE CHEZ LE DORYPHORE, LEPTINOTARSA DECEMLINEATA On a cherché à déterminer l'effet sur l'orientation olfactive de doryphores femelles des composants principaux identifiés dans l'huile des feuilles de pomme de terre, trans‐2‐hexen‐l‐ol, hexanol‐1, cis‐3‐hexen‐l‐ol, trans‐2‐hexenal et linalool, et les isomères trans‐3‐hexen‐l‐ol, cis‐2‐hexen‐l‐ol, hexanol‐2 et hexanol‐3. Si des pieds de pomme de terre ayant atteint leur développement complet provoquent des réactions anémotactiques positives, causées par leur odeur, chez le doryphore, aucune de ces substances chimiques, appliquée isolément, n'est attrayante. Associés à des pieds de pomme de terre, les composés suivants masquent l'odeur attrayante de la plante‐hôte: trans‐2‐hexen‐l‐ol, trans‐2‐hexenal, trans‐3‐hexen‐l‐ol et cis‐2‐hexen‐l‐ol. L'isomère géométrique trans‐3‐hexen‐l‐ol est à cet égard la substance la plus efficace. Les doryphores ne réagissent plus par une anémotaxie provoquée par l'odeur, mais ils sont pourtant activés. Le masquage de l'odeur de la plante‐hôte s'explique par une perturbation du complexe attrayant par suite du changement des proportions relatives de ses composants. Ces substances volatiles générales des feuilles vertes constituent probablement une partie importante des odeurs de feuille qui attirent différents insectes phytophages et représentent “l'odeur verte”.

show abstract

“…The model was used to predict the outcome of releasing cultured flies with the experimental design employed for field experiments i.e.flies released 19.5 and 24 m downwind from a 30 × 30 m plot. It has proved impossible to obtain information on the extent of the odour plume in the field using chemical methods (Wallbank & Wheatley, 1976). As a large percentage of females responded from a distance of at least 24 m in the field, it is expected that the biologically active plume would extend additional tens of metres downwind from the release point, in view of the response levels to different allylisothiocyanate concentrations and Sutton's (1947) formula.…”

Section: Testing the Predictions Of The Modelmentioning

confidence: 99%

MECHANISMS OF HOST PLANT FINDING IN ADULT CABBAGE ROOT FLY, DELIA BRASSICAE

Hawkes

Patton

Coaker

1978

Entomologia Exp Applicata

View full text Add to dashboard Cite

The behavioural mechanisms by which Delia brassicae (Hoffm.) locates its host plants are reviewed. In a large wind tunnel, the principal mechanism appears to be upwind orientation and flight stimulated by host plant odour. Gravid females landed frequently while in an odour plume, the mean flight length being 0.5 m for cultured flies under a variety of conditions. On leaving the odour plume while overshooting the source or moving across the air flow, the majority of females turned downwind, circled and re-entered the plume.These conclusions are seen as an hypothesis of host plant finding and adequate means of testing its validity in field situations are required. The approach developed here was to identify features which were likely to be peculiar to this type of host plant finding. A computer model was built to simulate the events downwind of an odour source and this predicted that the "average" cultured female moves upwind at the relatively slow rate of 65m/day. In two mark and recapture experiments in the field, cultured females moved upwind at estimated mean rates of 80 and 95m/day when released downwind of a brassica plot.Analysis of the behavioural mechanisms underlying the location of host plants by insects has been carried out largely under laboratory conditions. The progression of research on the cabbage root fly, Delia brassicae (Hoffm.) appears to be typical, having passed through similar stages to that on other species. Some field experiments have been carried out (de Wilde, 1947;Traynier, 1965;Hawkes, 1974Hawkes, , 1975 but when detailed observations of behaviour or an analysis of the causation of behaviour are required, the difficulties of field experimentation have forced a retreat to laboratory situations (Traynier, 1967 a, b;Coaker & Smith, 1970; Nair & McEwen, 1976;Hawkes & Coaker 1976, 1979 Hawkes, Patton & Coaker, unpubl.). The present knowledge on host plant finding in D. brassicae has then been outlined by field experiments but elaborated in the laboratory. This paper reviews the existing knowledge and suggests that the conclusions of laboratory experiments should be seen as an hypothesis and not as an endpoint. Such hypotheses need to be tested in the field to determine whether they provide a valid basis for the understanding of the ecological process of host plant finding. This paper illustrates an approach to the problem of validation of hypotheses. *) Present address: --Fasanv/igen 4, 752 52 Uppsala, Sweden.

show abstract

Volatile constituents from cauliflower and other crucifers

Cited by 61 publications

References 11 publications

New insights in analysing parasitoid attracting synomones: early volatile emission and use of stir bar sorptive extraction

New insights in analysing parasitoid attracting synomones: early volatile emission and use of stir bar sorptive extraction

GENERAL GREEN LEAF VOLATILES IN THE OLFACTORY ORIENTATION OF THE COLORADO BEETLE, LEPTINOTARSA DECEMLINEATA

MECHANISMS OF HOST PLANT FINDING IN ADULT CABBAGE ROOT FLY, DELIA BRASSICAE

Contact Info

Product

Resources

About