Long-term changes in frequencies ofPythium iwayamai andP. paddicum in upland- and paddy-field soils |
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| Authors: | Noritaka Hiraoka Susumu Takamatsu Takio Ichitani |
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| Institution: | (1) Laboratory of Plant Pathology, University of Osaka Prefecture, Gakuen-cho, 593 Sakai, Osaka, Japan;(2) Fukui Prefectural Agricultural Experiment Station, Ryo, 910 Fukui, Japan;(3) Present address: Laboratory of Plant Pathology, Mie University, Kamihama-cho, 514 Tsu, Mie, Japan |
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| Abstract: | The long-term changes in the frequencies ofPythium iwayamai andP. paddicum in upland- and flooded paddy-field soils were compared. The frequencies of both species fell in both soils within the first 6 months after they had been buried. After 36 and 48 months,P. iwayamai showed higher frequency thanP. Paddicum in upland-field soil, whileP. paddicum showed higher frequency thanP. iwayamai in paddy-field soil. These findings indicate respectively higher colonization ability to organic matters ofP. iwayamai in upland-field soil andP. paddicum in paddy-field soil.This study was partly supported by a Grant-in-Aid (no. 63560048) from the Ministry of Education, Science and Culture, Japan. |
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| Keywords: | detection paddy-field soil Pythium iwayamai Pythium paddicum upland-field soil |
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