caa a22 4500 477111785 CHVBK 20180405111611.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00015309 doi (NATIONALLICENCE)springer-10.1007/BF00015309 Soil fumigation and phosphorus supply affect the formation of Pisolithus-Eucalyptus urophylla ectomycorrhizas in two acid Philippine soils [Elektronische Daten] [N. Aggangan, B. Dell, N. Malajczuk, R. de la Cruz] To examine the effects of microbial populations and external phosphorus supply of two Philippine soils on mycorrhizal formation, Eucalyptus urophylla seedlings were inoculated with two Pisolithus isolates and grown in fumigated, reinfested and unfumigated soil fertilized with four rates of phosphorus. The Pisolithus isolates used were collected from under eucalypts in Australia and in the Philippines. Soils were infertile acid silty loams collected from field sites in Pangasinan, Luzon and Surigao, Mindanao. Significant interaction was observed between inoculation, soil fumigation and phosphorus supply on mycorrhizal formation by the Australian isolate in Surigao soil but not in Pangasinan soil. Soil fumigation enhanced mycorrhizal formation by the Australian isolate but did not affect root colonization by the Philippine isolate. Root colonization by the Australian isolate was highest in the reinfested soil while for the Philippine isolate it was highest in the unfumigated soil. The Australian isolate was more effective than the Philippine isolate in promoting growth and P uptake of E. urophylla seedlings in both soils. Total dry weight and P uptake of E. urophylla seedlings inoculated with the Australian isolate were maximum in fumigated and in the reinfested Pangasinan and Surigao soils supplied with 8 mg P kg-1 soil. In the unfumigated soil, growth of seedlings inoculated with the Australian isolate was significantly reduced. Seedlings inoculated with the Philippine isolate had the largest dry weights and P contents in unfumigated Pangasinan and Surigao soils supplied with 8 mg P kg-1 soil. These results indicate that the performance of the Australian Pisolithus isolate was markedly affected by biological factors in unfumigated soil. Thus, its potential use in the Philippines needs to be thoroughly tested in a variety of unfumigated soils before its widespread use in any inoculation programme. Kluwer Academic Publishers, 1996 Eucalyptus urophylla nationallicence mycorrhizal formation nationallicence phosphorus supply nationallicence Pisolithus tinctorius nationallicence soil microorganisms nationallicence soil fumigation nationallicence Aggangan N. School of Biological and Environmental Sciences, Murdoch University, 6150, Perth, Western Australia aut Dell B. School of Biological and Environmental Sciences, Murdoch University, 6150, Perth, Western Australia aut Malajczuk N. CSIRO Division of Forestry, Private Bag, P.O., 6014, Wembley, Western Australia aut de la Cruz R. National Institutes of Molecular Biology and Biotechnology, University of the Philippines at Los Banos, College, 4031, Laguna, Philippines aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 180/2(1996-03-01), 259-266 0032-079X 180:2<259 1996 180 11104 https://doi.org/10.1007/BF00015309 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00015309 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aggangan N. School of Biological and Environmental Sciences, Murdoch University, 6150, Perth, Western Australia aut NATIONALLICENCE 700 1- Dell B. School of Biological and Environmental Sciences, Murdoch University, 6150, Perth, Western Australia aut NATIONALLICENCE 700 1- Malajczuk N. CSIRO Division of Forestry, Private Bag, P.O., 6014, Wembley, Western Australia aut NATIONALLICENCE 700 1- de la Cruz R. National Institutes of Molecular Biology and Biotechnology, University of the Philippines at Los Banos, College, 4031, Laguna, Philippines aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 180/2(1996-03-01), 259-266 0032-079X 180:2<259 1996 180 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer