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  • Lepidoptera  (3)
  • Rhus  (2)
  • Springer  (5)
  • 1985-1989  (5)
  • 1955-1959
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  • Springer  (5)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Hickory shuckworm Cydia caryana: electroantennogram and flight tunnel studies of potential sex pheromone components (1987)
    Springer
    Entomologia experimentalis et applicata 44 (1987), S. 23-30 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Tortricidae ; Olethreutinae ; Cydia caryana ; sex pheromone ; electroantennogram ; flight tunnel ; behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les réponses olfactives antennaires de Cydia caryana, mesurées par électroantennogrammes (EAG), aux alcools et acétates à carbones monounsaturés en positions 12 et 14, ont montré que le système conjugué de double liaison, (E)-8-, (E)-10- du dodecadien-1-ol acétate constitue un composé chimique strutural critique de la phéromone sexuelle de C. caryana. De plus, les acétates: (E)-8-dodecen-1-ol,(Z)-8-dodecen-1-ol,(Z)-9-dodecen-1-ol, et le (Z)-12-tetradecen-1-ol, se sont révélés en AEG comme des composés secondaires de la phéromone. L'étude par AEG de la relation dose-réponse a conduit à l'hypothèse de deux catégories de populations de récepteurs de phéromones. L'analyse comportementale des résponses des papillons mâles dans le tunnel de vol aux composés qui ont provoqués les plus forts AEG, on fait estimer que les acétates (E,E)-8,10-dodécadien-1-ol et (Z)-9-dodecen-1-ol ressemblent (ou sont) les constituants de la phéromone sexuelle de C. caryana; tandis que les (Z)-8-dodecen-1-ol et (E)-10-dodecen-1-ol sont, soit des paraphéromones, soit des constituants mineurs de la phéromone. La signification biologique du (Z)-12-tétradécen-1-ol a été difficile à interprêter avec les expériences en tunnel de vol.
    Notes: Abstract Electroantennogram (EAG) measurement of male Cydia caryana moth antennal olfactory response to monounsaturated 12 and 14 carbon alcohols and acetates indicated that the (E)-8-, (E)-10- conjugated double bond system of a dodecadien-1-ol acetate is a critical chemical structural component of the C. caryana sex pheromone. Additionally, EAG measurements implicated (E)-8-dodecen-1-ol acetate, (Z)-8-dodecen-1-ol acetate, (Z)-9-dodecen-1-ol acetate and (Z)-12-tetradecen-1-ol as potential minor pheromonal components. An EAG dosage-response study suggested that there were at least two heterologous populations of pheromone acceptors. Behavioral analysis of male moth response in a flight tunnel to compounds which evoked the stronger EAG responses suggested that (E,E)-8,10-dodecadien-1-ol acetate and (Z)-9-dodecen-1-ol acetate resemble or are C. caryana sex pheromonal components, while (Z)-8-dodecen-1-ol acetate and (E)-10-dodecen-1-ol acetate are either parapheromones or are minor pheromone components. Behavioral significance of (Z)-12-tetradecen-1-ol was difficult to interpret in the flight tunnel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361305
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  • 2
    Electronic Resource
    Electronic Resource
    Recovery patterns of three chaparral shrub species after wildfire (1989)
    Springer
    Oecologia 80 (1989), S. 309-320 
    Details
    ISSN: 1432-1939
    Keywords: Chaparral ; Seedling survival ; Root depth ; Rhus ; Ceanothus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In a mature, even aged stand of mixed chaparral, Rhus laurina (facultative resprouter) had consistently higher water potentials and deeper roots than Ceanothus spinosus (facultative resprouter) and Ceanothus megacarpus (obligate seeder). For two years following a wildfire, the same stand of chaparral had resprouts with higher survivorships, predawn water potentials, stomatal conductances, photosynthetic rates and shoot elongation rates than seedlings. Supplemental irrigation of seedlings during summer months removed differences between resprouts and seedlings suggesting that the cause of such differences was limited water availability to the shoot tissues of seedlings. After two years of postfire regrowth, mean seedling survivorship for the obligate seeder (C. megacarpus) was 42%, whereas seedling survivorship for facultative resprouters was only 18% (C. spinosus) and 0.01% (R. laurina). Our results are consistent with the hypothesis that lack of resprouting ability among obligate seeders is offset by an enhanced ability to establish seedlings after wildfire, allowing obligate seeders to maintain themselves in mixed populations through many fire cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379032
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  • 3
    Electronic Resource
    Electronic Resource
    Comparative physiology of burned and unburned Rhus laurina after chaparral wildfire (1986)
    Springer
    Oecologia 71 (1986), S. 63-68 
    Details
    ISSN: 1432-1939
    Keywords: Rhus ; Lignotuber ; Nitrogen ; Water relations ; Fire
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Laurel Sumac (Rhus laurina) is a dominant member of the coastal chaparral community of southern California that survives periodic burning by wildfires by resprouting from a lignotuber (root crown). We investigated the physiological basis for resprouting by comparing shoot elongation, leaf nitrogen content, tissue water status, leaf conductance to water vapor diffusion, and photosynthetic rates of post-fire R. laurina to those of adjacent unburned shrubs. Resprouts had higher rates of shoot elongation, leaf conductance, and photosynthesis than mature, unburned shrubs. Leaf nitrogen contents were elevated in burned shrubs even though their leaves developed interveinal chlorosis. A comparison of soil water potential to predawn water potential indicated that roots of R. laurina remain active below 2 m during the first summer drought after wildfire. Our results support the hypothesis that lignotubers not only contain dormant buds that develop into aerial shoots after wildfire but they also supply nutrient resources that enhance shoot elongation. Because R. laurina is relatively sensitive to drought, yet very successful in its rapid recovery after fire, maintaining an active root system after shoot removal may be the primary function of the massive lignotuber formed by this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377322
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of the sex attractant pheromone of the southwestern corn borerDiatraea grandiosella Dyar (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 2051-2063 
    Details
    ISSN: 1573-1561
    Keywords: Southwestern corn borer pheromone ; Diatraea grandiosella Dyar ; Lepidoptera ; Pyralidae ; (Z)-9-hexadecenal ; (Z)-11-hexadecenal ; (Z)-13-octadecenal ; Zea mays L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We report the identification of the southwestern corn borer,Diatraea grandiosella Dyar (Lepidoptera: Pyralidae), female sex attractant pheromone as a mixture of (Z)-9-hexadecenal, (Z)-11-hexadecenal, and (Z)-13-octadecenal in the ratio 21.5∶70.6∶7.9. Initially, six 16- and 18-carbon aldehydes includingn-hexadecanal, (Z)-9-octadecenal, (Z)-11-octadecenal, and the three above were isolated from female gland rinses and evaluated as potential pheromone components by GLC-MS and laboratory bioassays. By laboratory flight chamber and field tests, the stated mixture of (Z)-9-hexadecenal, (Z)-11-hexadecenal, and (Z)-13-octadecenal was shown to be as effective as the female for male attraction. Electrophysiological studies confirmed the requirement for these three compounds, but not forn-hexadecanal, (Z)-9-octadecenal, and (Z)-11-octadecenal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01041996
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  • 5
    Electronic Resource
    Electronic Resource
    Blackheaded fireworm: Laboratory and field studies of its sex pheromone (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 1235-1242 
    Details
    ISSN: 1573-1561
    Keywords: Rhopobota naevana (Hübner) ; Rhopobota unipunctana Haworth ; Rhopobota naevana naevana (Hübner) ; blackheaded fireworm ; Lepidoptera ; Tortricidae ; Olethreutinae ; sex pheromone ; sex attractant ; (Z)-11-tetradecen-1-ol ; (Z)-11-tetradecen-1-ol acetate ; (Z)-9-dodecen-1-ol acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Electroantennogram (EAG) responses of maleRhopobota naevana (Hübner), the blackheaded fireworm, to all of the monoene straightchain 12- and 14-carbon alcohols and acetates implicated (Z)-11-tetradecenl-1-ol (Z11–14∶OH) and its acetate (Z11–14∶Ac) as sex pheromone components.Z11–14∶Ac produced the strongest EAG response of all compounds tested. Gas chromatography-mass spectrometry (GC-MS) analysis of extract of female sex pheromone glands (SPG) confirmed the presence ofZ11–14∶OH (125 pg/female) andZ11–14∶Ac (600 pg/female) (all other monoenes had different retention times). In field tests, traps baited withZ11–14∶OH alone captured males, but traps baited withZ11–14∶Ac alone did not. Traps baited with a combination ofZ11–14∶OH andZ11–14∶Ac in various ratios did not produce better trap catches thanZ11–14∶OH alone. (Z)-9-Dodecen-1-ol acetate (Z9–12∶Ac), reported by others to be a field attractant, did not produce trap catch in our tests, but in combination withZ11–14∶ OH (98∶2 in septa corresponding to 95:5 in vapor,Z11–14∶OH toZ9–12∶AC) produced a sevenfold increase in catch overZ11–14∶OH alone. IfZ9–12∶AC had been present in extract of SPG at 2–5% ofZ11–14∶OH, it would not have been detected in our GC-MS experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020551
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