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  • patterning  (2)
  • Springer  (2)
  • Institute of Physics
  • 1
    Electronic Resource
    Electronic Resource
    Allelopathic effects ofPolygonum aviculare L. I. Vegetational patterning (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 993-1009 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; interference ; patterning ; biological control ; Polygonum ; Cynodon ; Chenopodium ; Sorghum ; Gossypium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Polygonum aviculare was observed to spread rapidly into heavy stands ofCynodon dactylon (L.) Pers. resulting in death of the latter. This indicated a strong interference againstCynodon dactylon. Measurements of selected soil minerals and physical factors indicated that competition was probably not the chief cause of that interference. Soil collected under deadPolygonum was very inhibitory to all test species exceptSporobolus pyramidatus (Lam.) Hitchc., suggesting the presence of inhibitory compounds. Tops and roots ofPolygonum, root exudates, and leachate of the tops inhibited seed germination and seedling growth of most test species. Therefore, allelopathy apeared to be the dominant component of the interference, with competition probably accentuating its effects.Polygonum aviculare was inhibitory toGossypium barbadense L. andSorghum bicolor (L.) Moench, indicating that allelopathy is an important component of the interference byPolygonum against crop yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987881
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  • 2
    Electronic Resource
    Electronic Resource
    Allelopathic effects ofCitrus aurantium L. (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 1515-1525 
    Details
    ISSN: 1573-1561
    Keywords: Allelopathy ; patterning ; sour orange ; Citrus aurantium ; date palm ; Phoenix dactylifera ; Cynodon ; Chenopodium ; Amaranthus ; Avena
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Field observations on undisturbed stands of sour orange revealed thatCynodon dactylon, Chenopodium album, Avena sativa, andAmaranthus retroflexus were not able to grow normally and complete their life cycles under its canopies, although the same species grow well under adjacent trees of date palm. Investigations revealed that the failure of the test species to grow normally under sour orange was not due to competition for light, moisture and minerals or to differences in soil texture or pH. Soil under sour orange trees drastically reduced seed germination and/or seedling growth of test species. Aqueous extracts, decaying materials, and volatile compounds of senescent and nonsenescent sour orange leaves were found to inhibit seed germination and/or seedling growth of test species. Therefore, allelopathy appeared to be the basic factor responsible for the reduction in plant growth with competition propably accentuating its effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012197
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    Paper (German National Licenses)
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