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  • Lepidoptera  (4)
  • Bipolaris oryzae  (2)
  • Springer  (6)
  • International Union of Crystallography (IUCr)
  • 1995-1999  (6)
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Keywords
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Chemical nature of larval osmeterial secretions of papilionid butterflies in the generaParnassius, Sericinus andPachliopta (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 859-867 
    Details
    ISSN: 1573-1561
    Keywords: Osmeterial secretion ; Lepidoptera ; Papilionidae ; Parnassiinae ; Papilioninae ; Parnassius glacialis ; Sericinus montela ; Pachliopta aristolochiae ; aliphatic acid and ester ; monoterpene ; sesquiterpene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Volatile components of the larval osmeterial secretion ofParnassius glacialis (Parnassiinae, Parnassiini) consisted of isobutyric acid, 2-methylbutyric acid, and their methyl esters. In contrast, the osmeterial exudate ofSericinus montela (Parnassiinae, Zerynthiini) was characterized as monoterpene hydrocarbons comprisingβ-myrcene (Major),α-pinene, sabinene, limonene, andβ-phellandrene, whereas that ofPachliopta aristolochiae (Papilioninae, Troidini) was composed of numerous sesquiterpene hydrocarbons, includingα-himachalene,α-amorphene, and germacrene-A, and a few oxygenated sesquiterpenoids. In these three species, the chemical nature of the secretions of the last and the penultimate instars was essentially of similar quality, suggesting that the three genera,Parnassius, Sericinus, andPachliopta, are assigned to homogeneous types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033466
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  • 2
    Electronic Resource
    Electronic Resource
    Male sex pheromone of a giant danaine butterfly,Idea leuconoe (1996)
    Springer
    Journal of chemical ecology 22 (1996), S. 949-972 
    Details
    ISSN: 1573-1561
    Keywords: Lepidoptera ; Danainae ; Idea leuconoe ; hairpencil ; pheromone ; Parsonsia laevigata ; pyrrolizidine alkaloid ; mellein ; defense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Males of a giant danaine butterfly,Idea leuconoe, display hairpencils during courtship. The females were visually attracted to and olfactorily arrested by an artificial butterfly model to which male hairpencil extracts were added. The hairpencil extracts contained a complex mixture of volatiles, including pyrrolizidine alkaloid (PA) derivatives (danaidone, viridifloric β-lactone), aromatics (phenol,p-cresol, benzoic acid), terpenoids (geranyl methyl thioether, (E,E)-farnesol), a series of γ-lactones (6-hydroxy-4-undecanolides and its homologs), hydrocarbons [(Z)-9-tricosene, etc.], and several compounds with higher molecular weight. A mixture of the major volatiles applied to a butterfly dummy strongly elicited an abdomen-curling acceptance posture in females. Viridifloric β-lactone and danaidone induced significant electroantennogram responses on the female's antennae, suggesting their principal role together with other hairpencil components as a sex pheromone to seduce females.I. leuconoe males seem to acquire the precursor for both of the PA fragments from the host plant,Parsonsia laevigata (Apocynaceae), during the larval stage; thereby they do not show pharmacophagous behavior towards PA-containing plants during the adult stage. However, males are pharmacophagously attracted to and feed on a number of simple phenolic compounds in a manner similar to other danaine species towards PAs. Wild males sequester one of the phagostimulants, (−)-mellein, in the hairpencils in varying quantities. Phenolic compounds incorporated in the hairpencils may act primarily as warning odors linked with the defensive PAs present in the body tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02029947
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  • 3
    Electronic Resource
    Electronic Resource
    Oviposition Stimulants for Sulfur ButterflyColias erate poliographys: Cyanoglucosides as Synergistis Involved in Host Preference (1997)
    Springer
    Journal of chemical ecology 23 (1997), S. 323-331 
    Details
    ISSN: 1573-1561
    Keywords: Oviposition stimulants ; Colias erate ; Lepidoptera ; Pieridae ; Trifolium repens ; Leguminosae ; cyanoglucosides ; linamarin ; lotaustralin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Host-plant chemicals stimulating oviposition by a Leguminosae-feeding pierid butterflyColias erate poliographyswere isolated and identified from one of its primary host plants, white clover (Trifolium repens). Females readily deposited eggs in response to methanolic extracts of the plant, and subsequent partition of the extracts with organic solvents revealed that chemical constituents critical for host recognition reside in the water-soluble fraction. Further fractionation of the hydrosoluble fraction by column chromatography led to the separation of an active fraction and two cyanoglucosides, linamarin and lotaustralin. Conspicuous oviposition response was evoked by unidentified polar compound(s), while these cyanoglucosides exerted no stimulatory activity by themselves. However, ovipositing females preferred samples containing either of the two cyanoglucosides. In dual-choice bioassays, significantly more eggs were laid on samples admixed with the cyanoglucosides, suggesting that the cyanoglucosides serve as synergistic oviposition stimulants and could play an important role in host selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/B:JOEC.0000006362.96722.c9
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  • 4
    Electronic Resource
    Electronic Resource
    Pyrrolizidine Alkaloids Mediate Host-Plant Recognition by Ovipositing Females of an Old World Danaid Butterfly, Idea leuconoe (1997)
    Springer
    Journal of chemical ecology 23 (1997), S. 1703-1713 
    Details
    ISSN: 1573-1561
    Keywords: Oviposition stimulants ; Idea leuconoe ; Lepidoptera ; Danaidae ; Parsonsia laevigata ; Apocynaceae ; pyrrolizidine alkaloids ; parsonsianine ; parsonsianidine ; 17-methylparsonsianidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A giant danaid butterfly, Idea leuconoe, specializes on apocynaceous plants such as Parsonsia laevigata, which has been reported to contain pyrrolizidine alkaloids. Females of I. leuconoe deposited eggs in response to methanolic extract of P. laevigata, and subsequent bioassay-guided fractionation of the extract revealed that phytochemicals crucial for host recognition by ovipositing females are Parsonsia-specific macrocyclic pyrrolizidine alkaloids including parsonsianine, parsonsianidine, and 17-methylparsonsianidine. Parsonine, another P. laevigata pyrrolizidine component with a keto-dihydropyrrolizine moiety that is closely related in structure to male pheromones of the butterfly, and several nonhost pyrrolizidine alkaloids were entirely inactive. We interpret these data as strong evidence for an ancestral association through herbivory between danaid butterflies and pyrrolizidine alkaloids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/B:JOEC.0000006445.61545.82
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of phototropic response of spore germ tubes on infection process inColletotrichum lagenarium andBipolaris oryzae (1996)
    Springer
    Mycoscience 37 (1996), S. 331-337 
    Details
    ISSN: 1618-2545
    Keywords: Bipolaris oryzae ; Colletotrichum lagenarium ; germ tube growth ; infection structure ; phototropism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The germ tubes ofColletotrichum lagenarium showed negative phototropism to UV-blue (300–520 nm) and far-red (〉700 nm) regions with maximum in the near ultraviolet (NUV) region, while monochromatic radiations of 575–700 nm (yellow-red region) induced positive phototropism with maximum in the red region. Green light (520–575 nm) was ineffective. Negative phototropism-inducing wavelength regions inhibited germ tube growth and positive phototropism-inducing wavelength regions promoted it significantly.Bipolaris oryzae did not show any phototropic response and light did not affect the germ tube growth. These results indicate that the lens effect, in combination with the light growth reaction and light growth inhibition, is the mechanism of the phototropism of germ tubes ofC. lagenarium. NUV radiation, which induced negative phototropism ofC. lagenarium, promoted appressorium formation, while red light, which induced positive phototropism, suppressed it significantly. In the case ofB. oryzae, light did not affect the infection structure formation. These results indicate that negative phototropism of germ tubes ofC. lagenarium favors the infection process by facilitating the contact of the tips of germ tubes with the host surface, while positive phototropism has the opposite effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02461305
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  • 6
    Electronic Resource
    Electronic Resource
    Suppression and reactivation of UV-induced sporulation by blue light inBipolaris oryzae (1999)
    Springer
    Mycoscience 40 (1999), S. 363-366 
    Details
    ISSN: 1618-2545
    Keywords: Bipolaris oryzae ; blue light ; reactivation ; sporulation ; UV radiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sporulation inBipolaris oryzae was induced by UV radiation (295 nm), but the number of conidia gradually decreased with increasing duration of UV radiation longer than 1 min. The inductive effect of UV radiation can be nullified by blue light (459 nm) applied immediately before or after inductive UV radiation shorter than 1 min. In contrast, the number of conidia increased with an increasing duration of blue light applied after inductive UV radiation longer than 1 min, but not if it was applied before UV radiation. The present study firstly revealed the possibility of photoreactivation inB. oryzae sporulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02463882
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