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  • Gossypium hirsutum  (2)
  • Aortopulmonary fistulous tract  (1)
  • 1
    ISSN: 1432-1971
    Keywords: Interrupted aortic arch ; Aortic atresia ; Aortopulmonary fistulous tract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We present a case of interruption of the aortic arch (IAA) in association with aortic atresia. A pulmonary artery to ascending aorta fistulous channel at the level of the sinuses of Valsalva of the pulmonary artery was present and supplied the ascending aorta and coronary arteries. The communication had a significant length, so embryologically it is not an aortopulmonary window. There have been only three reported cases in the literature of IAA with aortic atresia; in none was a pulmonary artery to ascending aorta fistulous tract present.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 23 (1997), S. 97-117 
    ISSN: 1573-1561
    Keywords: Oxidative stress ; nutritional stress ; induced resistance ; chlorogenic acid ; insect–plant interactions ; herbivory ; tannins ; polyphenol oxidase ; lignin ; phenolics ; Gossypium hirsutum ; Helicoverpa zea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Induced resistance in cotton (Gossypium hirsutum) foliage and squares to herbivory by Helicoverpa zea (Lepidoptera: Noctuidae) is reported in this study. Induced resistance was indicated by decreased larval growth when larvae fed on previously damaged foliage or squares compared to the controls. Herbivory caused a significant decline in host nutritional quality as shown by a reduction in protein and most amino acids in both foliage and squares. Peroxidase, ascorbate oxidase, and diamine oxidase activities increased in both damaged foliage and squares, whereas levels of the nutritional antioxidant, ascorbate, were depressed after larval feeding. Larval feeding also markedly enhanced lipoxygenase activity and lipid peroxides in square tissues. Moreover, feeding damage altered the quantitative levels of phenolic compounds in foliage and squares. These results indicate a significant shift in the oxidative status of cotton plants following herbivory as indicated by increased oxidative enzyme activity, decreased levels of the nutritional antioxidant ascorbate, and increased levels of phenolic prooxidants (i.e., chlorogenic acid) and lipid peroxides.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 23 (1997), S. 1805-1818 
    ISSN: 1573-1561
    Keywords: Salicylic acid ; systemic acquired resistance ; hydrogen peroxide ; catalase ; ascorbate peroxidase ; signaling ; induced resistance ; herbivory ; Gossypium hirsutum ; Helicoverpa zea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Our previous study indicated that insect herbivory on cotton induced resistance to the cotton bollworm (Helicoverpa zea). Here we examine the role of salicylic acid as a signal in cotton for the induced resistance. Abundant evidence has accumulated showing that salicylic acid plays a key role in coordinating the expression of systemic acquired resistance against phyto-pathogens. We report that herbivory results in significant increases in foliar salicylic acid and H2O2, a response frequently observed following pathogenesis. In other well-studied systems (e.g., tobacco), salicylic acid inhibits the enzymatic decomposition of H2O2 by catalase and ascorbate peroxidase, but in cotton, salicylic acid has no effect on these enzymes in vitro. Furthermore, while herbivory enhances foliar catalase and ascorbate peroxidase activities, the application of salicylic acid or methyl salicylate to cotton plants does not affect foliar resistance to H. zea. The possible role of salicylic acid as a signal for induced resistance is discussed in light of these findings.
    Type of Medium: Electronic Resource
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