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  • 1990-1994  (2)
  • 1993  (2)
  • Calliphora vicina  (1)
  • kiwifruit  (1)
  • Sodium channel
  • 1
    Electronic Resource
    Electronic Resource
    Phase shifts of the adult locomotor activity rhythm in Calliphora vicina induced by non-steroidal ecdysteroid agonist RH 5849 (1993)
    Springer
    Journal of comparative physiology 172 (1993), S. 101-108 
    Details
    ISSN: 1432-1351
    Keywords: Calliphora vicina ; Circadian rhythms ; Phase response curve ; RH 5849 ; Ecdysteroids ; Computer modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract RH 5849, a non-steroidal ecdysteroid mimic, was found to cause consistent phase shifts in the circadian rhythm of locomotor activity of the blowfly, Calliphora vicina. This compound causes phase advances in the early subjective night and phase delays in the late subjective night. This effect is the opposite, but not the mirror image of the phase response curve obtained for 1 h light pulses. This suggests that ecdysteroids might act as entraining agents via the output pathway by feedback to “clock” neurons in the brain. A computer model based on 12 pacemaker neurons with circadian periods (τ values) from short to long without simulated feedback from the ecdysteroid system becomes arrhythmic; with feedback, the oscillators become synchronized to a common period. The possible role of ecdysteroids as endogenous synchronizing agents in the insect circadian system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214719
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fruit and vegetative characteristics of endosperm-derived kiwifruit (Actinidia chinensis F) plants (1993)
    Springer
    Euphytica 71 (1993), S. 57-62 
    Details
    ISSN: 1573-5060
    Keywords: Actinidia chinensis ; kiwifruit ; kiwi ; endosperm-derived plants ; field characteristics ; somaclonal variation ; in vitro ; tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Four hundred and thirty-eight endosperm-derived plants of kiwifruit (Actinidia chinensis) were observed. The plants were field planted in 1982 and all had flowered annually since 1986. A sample of these plants was assessed for leaf morphology, growth characteristics, flowering, sex expression, chromosome number, and fruit quality characteristics. The chromosome number of the endosperm plants varied from 58 to 146; most were aneuploid. A few triploid plants (2n=3x=87) were obtained; none of these were parthenocarpic. Segregation of sex expression was observed in progeny from one endosperm-derived callus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023467
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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