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  • Physarum polycephalum  (2)
  • Caryocaraceae  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Post-fusion incompatibility in Physarum polycephalum (1979)
    Springer
    Archives of microbiology 122 (1979), S. 1-7 
    Details
    ISSN: 1432-072X
    Keywords: Lethal reaction ; Physarum polycephalum ; Somatic incompatibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the myxomycete Physarum polycephalum the somatic incompatibility between plasmodia of a killer strain and a sensitive strain is expressed as a lethal reaction (LR) in the sensitive strain within 6 h after fusion of both plasmodia. The lethal reaction was not caused by any of the extra-cellular compounds produced by the myxomycete nor was the result of intra-cellular compounds of the killer strain which were able to diffuse or could be transported into the plasmodium of the sensitive strain. The lethal reaction could be prevented using inhibitors of RNA or protein synthesis applied within a certain time after fusion. This suggests that the sequence of events leading to the LR involves RNA and protein synthesis. These results are in agreement with genetic experiments which prove that the post-fusion incompatibility reaction is controlled genetically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408039
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  • 2
    Electronic Resource
    Electronic Resource
    Post-fusion incompatibility in Physarum polycephalum (1981)
    Springer
    Archives of microbiology 129 (1981), S. 257-260 
    Details
    ISSN: 1432-072X
    Keywords: Physarum polycephalum ; Lethal reaction ; Incompatibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The lethal reaction following fusion of plasmodia of a sensitive and a killer strain of Physarum polycephalum could be prevented by the incorporation of 5-bromo-2′-deoxyuridine in both strains. This result suggests the involvement of transcription in the lethal reaction. Although under appropriate conditions fusion of the strains is not followed by a lethal reaction the fused plasmodium will behave as the killer strain after subculturing. At different times after fusion, DNA was isolated from a plasmodium in which visible lethal reaction was prevented and separated on CsCl gradients. Killer DNA remained intact but sensitive DNA was broken down, mainly from 8–11 h after fusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414693
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  • 3
    Electronic Resource
    Electronic Resource
    Amino acids and sugars in nectar, and their putative evolutionary significance (1984)
    Springer
    Plant systematics and evolution 145 (1984), S. 55-77 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Acanthaceae ; Bignoniaceae ; Bombacaceae ; Caesalpiniaceae ; Caryocaraceae ; Chrysobalanaceae ; Fabaceae ; Lobeliaceae ; Lythraceae ; Malvaceae ; Marcgraviaceae ; Mimosaceae ; Musaceae ; Onagraceae ; Orchidaceae ; Passifloraceae ; Proteaceae ; Rubiaceae ; Solanaceae ; Tiliaceae ; Zingiberaceae ; Flower nectar ; amino acids ; sugars ; evolutionary significance ; pollination biology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Individual amino acids and sugars from flower nectar of 32 plant species with different pollination systems were quantified and compared. Data show that there is no correlation between sugar and amino acid concentration. Furthermore there is no correlation between composition and concentration of amino acids and evolutionary advancement, nor any direct relation with pollination systems. However, higher sugar concentrations are often linked with more advanced morphological characters. Nectars from pierced or damaged flowers or nectars contaminated with pollen exhibit modifications and increases in amino acid composition. The presence of proline probably indicates such pollen contamination. Most pollinating animals depend on flower nectar in their energetic requirements, yet innumerable alternative amino acid and protein sources exist. Future research has to consider the relationship between nutritional requirements of pollinating animals and dependence on flower nectars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984031
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