Plant and Soil

, Volume 42, Issue 1, pp 241–253 | Cite as

A survey of fungi and actinomycetes colonizing the newly reclaimed soil of the polder Zuidelijk Flevoland

  • G. M. Tichelaar
  • H. Vruggink


Colonization by fungi and actinomycetes of a newly reclaimed soil was studied during a period of five years. The fungus population increased from 500 to about 200,000 propagules per gram of soil during this period. Since the soil was monocultured with reed (Phragmites australis), cellulose, being the main food substrate, changed the pattern of fungus colonization, favouring the cellulose-decomposers at the cost of the non-cellulolytic fungi. The greatest part of the mycoflora in August 1972 compromisedTrichoderma spp. (67%). The total number of actinomycetes per gram of soil increased from 9 × 103 to 4 × 106 at the end of the period. The main actinomycetes isolated wereStreptomyces flavovirens, Streptomyces griseus, Streptomyces tanashiensis andMicromonospora spp. Unlike the polder soils already under cultivation, the new soil very seldom yielded isolations ofStreptomyces scabies.


Cellulose Plant Physiology Streptomyces Great Part Fungus Colonization 
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Copyright information

© Martinus Nijhoff 1975

Authors and Affiliations

  • G. M. Tichelaar
    • 1
  • H. Vruggink
    • 1
  1. 1.Institute of Phytopathological ResearchWageningen

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