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  • Citrus  (2)
  • 10-dodecadien-1-ol acetate  (1)
  • Springer  (3)
  • Cambridge University Press
  • 1980-1984  (3)
  • 1940-1944
  • 1
    Electronic Resource
    Electronic Resource
    Biochemical resistance of citrus to fruit flies. Demonstration and elucidation of resistance to the caribbean fruit fly, Anastrepha suspensa (1983)
    Springer
    Entomologia experimentalis et applicata 34 (1983), S. 40-50 
    Details
    ISSN: 1570-7458
    Keywords: Tephritidae ; Anastrepha suspensa ; Fruit Flies ; Citrus ; Senescence ; Host Plant Resistance ; Allelochemics ; Terpenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Nous avons trouvé que la résistance des fruits de Citrus aux attaques d'Anastrepha suspensa Loew est due aux huiles essentielles allélopathiques de la zone flavedo du zeste. Le taux d'éclosion des œufs pondus entre les glandes essentielles du zeste était significativement plus élevé que celui des œufs pondus dans les zones glandulaires. La mortalité se produisait essentiellement au premier stade larvaire, et beaucoup de larves mouraient avant d'atteindre l'albédo (la zone sans huile essentielle du zeste). Les pamplemousses sont plus sensibles au développement larvaire que les oranges, et les citrons ne portent virtuellement pas d'attaques réussies de cette mouche. Les fruits qui étaient laissés sur l'arbre après la maturation étaient un peu plus sensibles que les fruits de début de saison. La résistance du fruit était liée à 1) l'épaisseur dur flavedo 2) une forte concentration de linalool en relation avec le limonène dans les essences du zeste et 3) la valeur absolue d'essences par unité de surface de zeste. Les composés volatiles de l'essence de zeste plutôt que les fractions à point d'ébullition élevé paraissent être responsables de la toxicité des essences. Les citrons, qui sont indemnes d'attaques de cette espèce et d'autres de Tephritidae, avaient un flavedo sifnificativement plus épais et avait deux foi plus d'essences par unité de surface de zeste que les oranges et les pamplemousses; l'essence de citron est connue aussi pour être riche en terpénoïdes oxygénés, comme le linalool. La discussion porte sur les applications possibles de ces phénomènes dans l'amélioration de la résistance des agrumes aux Téphritidae.
    Notes: Summary Resistance of citrus fruit to attack by the Caribbean fruit fly, Anastrepha suspensa (Loew), was attributed to allelopathic essential oils in the flavedo region of the peel. Hatchability of eggs laid between peel oil glands was significantly greater than that of eggs laid into glands. Mortality occurred principally in the 1st larval instar, and most larvae died before reaching the albedo (the non-oily region of the peel). Grapefruit were more susceptible to larval development than oranges, and lemons were virtually immune to successful attack by this fly. Fruit that were allowed to remain on the tree until overripe were somewhat more susceptible than early-season fruit. Fruit resistance was correlated with (1) flavedo thickness, (2) a high concentration of linalool in relation to limonene in the peel oil, and (3) the absolute amount of oil per unit area of peel. Volatile components of the peel oil rather than high boiling fractions appear to account for oil toxicity. Possible applications of these findings are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300898
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  • 2
    Electronic Resource
    Electronic Resource
    Composition, ultrastructure and function of the cutin- and suberin-containing layers in the leaf, fruit peel, juice-sac and inner seed coat of grapefruit (Citrus paradisi Macfed.) (1980)
    Springer
    Planta 149 (1980), S. 498-511 
    Details
    ISSN: 1432-2048
    Keywords: Citrus ; Cutin ; Diffusion resistance ; Seed coat ; Suberin ; Wax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cutin and suberin polymers from various anatomical regions of grapefruit were analyzed chemically and ultrastructurally. The leaf, fruit peel and juice-sac showed an amorphous cuticular layer. The cutin in the leaf was composed of 10,16-dihydroxy C16 acid and its positional isomers as the major monomers whereas 16-hydroxy-10-oxo C16 acid was a major component in the fruit peel. Juice-sac cutin, on the other hand, contained the dihydroxy C16 acids, hydroxyoxo C16 acids, hydroxyepoxy C18 acids and trihydroxy C18 acids. Ultrastructural examination of the inner seed coat showed that an amorphous cuticular layer encircled the entire seed except in the chalazal region which showed several layers of cells with lamellar suberin structure throughout the cell walls. Consistent with the ultrastructural assignment, the compositions of the aliphatic components of the polymers from the chalazal region and the non-chalazal region indicated the presence of suberin and cutin, respectively. The aliphatic portion of the polymer from the chalazal region of the inner seed coat contained C16, C18:1, C22 and C24 ω-hydroxy acids (46% combined total) and the corresponding dicarboxylic acids (43%) as the major components. ω-Hydroxy-9,10-epoxy C18 acids and 9,10,18-trihydroxy C18 acids were the major components (77%) of the polymer from the non-chalazal portion of the inner seed coat. The main portion and the chalazal region of the inner seed coat yielded 17 and 342 μg/cm2 of aliphatic monomers, respectively, and the diffusion resistance of these two portions of the inner seed coat were 62 and 192 sec/cm, respectively. The inner seed coat was shown to be the major moisture diffusion barrier influencing imbibition and germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385755
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  • 3
    Electronic Resource
    Electronic Resource
    Filbertworm sex pheromone (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 53-61 
    Details
    ISSN: 1573-1561
    Keywords: Melissopus latiferreanus ; Lepidoptera ; Tortricidae ; Olethreutinae ; filbertworm ; sex pheromone ; sex attractant ; (E,E)-8 ; 10-dodecadien-1-ol acetate ; (E,Z)-8,10-dodecadien-1-ol acetate ; conjugated diene isomerization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract (E,E)- and (E,Z)-8,10-Dodecadien-1-ol acetates were identified in a 1∶4.3 ratio in the extract of abdominal tips of female filbert-worm moths,Melissopus latiferreanus (Walsingham). The identifications were based on electroantennogram (EAG) analysis, gas chromatography, mass spectrometry, ozonolysis, and synthesis. TheE,Z isomer produced the stronger EAG response. In the field tests of various ratios ofE,E∶E,Z, the ratio found in the extract captured the most males. The pureE,E isomer initially was not attractive by itself (〈0.1%E,Z) but became attractive after a few days, presumably because of isomerization. TheE, Z isomer (〈0.1%E,E) was attractive initially, but this compound might have isomerized faster than theE,E isomer. A study of the isomerization showed that regardless of the initial mixture of 8,10-dodecadien-1-ol acetate isomers, almost complete equilibration existed after one month. The equilibrium mixture consisted of 9%Z8,E10, 65%E8,E10, 23%E8,Z10, and 3%Z8,Z10. Concentrations in rubber septa (1∶4 ratio ofE,E toE,Z) of 0.03–3.0 mg/septum produced equivalent trap catches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987643
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