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  • Plastid development  (2)
  • Sinapis  (2)
  • Anterior cruciate ligament  (1)
  • 1
    ISSN: 1432-2048
    Schlagwort(e): Carotenoids ; Chlorophylls ; Herbicides ; Phytochrome ; Plastid development ; Ribulosebisphosphate carboxylase
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Treatment of the mustard (Sinapis alba L.) seedling with the herbicide SAN 9789 inhibits synthesis of colored carotenoids and interferes with the formation of plastid membrane lipids without affecting growth and morphogenesis significantly. In farred light, which is hardly absorbed by chlorophyll, development of plastid ultrastructure, synthesis of ribulosebisphosphate carboxylase and synthesis of chlorophyll are not affected by SAN 9789. It is concluded that normal phytochrome actions on plastid structural development, protein and chlorophyll syntheses are not affected by the absence of carotenoids provided that there is no significant light absorption in chlorophyll. The findings show that the inhibition of synthesis of one set of plastid membrane components (the carotenoids) does not stop synthesis of other components such as chlorophyll and does not halt membrane assembly. Supplementary experiments with the closely related compound SAN 9785, which affects the amount and composition of plastid lipids but not carotenoid and chlorophyll syntheses, suggest that the effect of the herbicide SAN 9789 is due exclusively to its inhibition of synthesis of colored carotenoids. In the presence of SAN 9789 white or red light at high fluence rate causes photodestruction of chlorophyll and ribulosebisphosphate carboxylase and photodecomposition of thylakoids. These effects are interpreted as resulting exclusively from the self-photooxidation and photosensitizing action of chlorophyll once the protection by carotenoids of chlorophyll against self- and sensitized photooxidation is lost.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Planta 133 (1976), S. 53-56 
    ISSN: 1432-2048
    Schlagwort(e): Plastogenesis ; Carboxylase ; Photomorphogenesis ; Sinapis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract We have studied the problem whether the phytochrome-mediated accumulation of ribulosebisphosphate carboxylase (“carboxylase”; EC 4.1.1.39) in the cotyledons of sinapis alba L. is related to size, ultrastructure, or organization of the plastid compartment. We have shown that under different light conditions (e.g. continuous far-red light, continuous white light) which lead to conspicuously different plastids the time course of the enzyme levels remains precisely the same. It is concluded that the onset and the rate of carboxylase accumulation is not related to the organizational state of the plastid compartment as discernible under the electron microscope.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Planta 148 (1980), S. 279-286 
    ISSN: 1432-2048
    Schlagwort(e): Carotenoids ; Chlorophylls ; Light control ; Phytochrome ; Plastid development ; Sinapis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Carotenoid accumulation in the cotyledons of the mustard seedling (Sinapis alba L.) is controlled by light. Besides the stimulatory function of phytochrome in carotenogenesis the experiments reveal the significance of chlorophyll accumulation for the accumulation of larger amounts of acrotenoids. A specific blue light effect was not found. The data suggest that light exerts its control over carotenoid biogenesis through two separate mechanisms: A phytochrome regulation of enzyme levels before a postulated pool of free carotenoids, and a regulation by chlorophyll draining the pool by complex-formation.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Arthroskopie 13 (2000), S. 69-71 
    ISSN: 1434-3924
    Schlagwort(e): Schlüsselwörter Kniegelenkdistorsion ; Blockierungserscheinungen ; Vorderes Kreuzband ; Synoviaimpingement ; Arthroskopie ; Key words Acute knee trauma ; Loss of extension ; Anterior cruciate ligament ; Synovial impingement ; Arthroscopy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary We report on two cases of acute knee trauma with rupture of the synovial tissue of the anterior cruciate ligament. The femoral part of the synovia had retracted and was locked between the femoral attachment of the anterior cruciate ligament and the femur condyle. Both patients showed clinical signs of an acute lesion of the medial meniscus with loss of extension and tenderness on palpation over the medial joint cavity. After complete arthroscopic resection of the interfered soft tissue, both patients had full range of motion and no signs of any knee discomfort.
    Notizen: Zusammenfassung Wir berichten über 2 Fälle eines traumatischen Einrisses des Synoviaüberzugs über dem vorderen Kreuzband nach Kniegelenkverdrehtrauma. Der femorale Anteil der Synovia retrahierte sich und klemmte zwischen dem femoralen Ansatz des vorderen Kreuzbands und der Femurkondyle im Sinne eines Impingements mit schmerzbedingter Streckhemmung ein. Klinisch imponierte der Befund wie eine akute Meniskuseinklemmung. Arthroskopisch wurden eine Meniskusläsion ausgeschlossen und die eingeschlagenen Weichteile entfernt. Bei sofort postoperativ wiedererlangter schmerzfreier Beweglichkeit blieben die Patienten beschwerdefrei.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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