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No.49 (2002/12) >

 
Title :Pasteuria penetransのサツマイモネコブセンチュウへの付着に及ぼす土壌の影響
Title alternative :The effect of soil on the adhesion of Pasteuria penetrans on southern root-knot nematodes
Authors :諸見里, 善一
土田, 大輔
田場, 聡
Authors alternative :Moromizato, Zen-ichi
Tsuchida, Daisuke
Taba, Satoshi
Issue Date :1-Dec-2002
Abstract :Pasteuria penetransはネコブセンチュウに寄生するため,本菌を用いた生物防除法が確立されている。しかし,一般に生物農薬は環境に左右されるため土壌との適合性を検討する必要がある。本研究では,本菌によるネコブセンチュウの生物的防除を効果的い行うために,本菌の付着能に及ぼす影響を検討した。サツマイモネコンブセンチュウと本菌を沖縄県に分布する3種類の土壌に接種すると島尻マージ土壌では低濃度区ですでに高い付着率を示し,他の土壌区では濃度が高くなるにつれて付着率も高くなった。土壌区間での付着率の違いを土壌pHと土壌成分の面から検討した。その結果,pHの影響は認められなかったが,島尻マージは他の土壌に比較してアルミニウム含量が多く,また塩化アルミニウムを添加した水溶液中では付着効果が高くなったことから,アルミニウムイオンが本菌の線虫への付着を促進する効果が示唆された。
Pasteuria penetrans, a budding bacterium parasitizes the root-knot nematodes. Therefore, the biological control by the bacterium has been established. however, as the effects of biopesticides depend on soil environment in generally, it is very important to examine the condition of compatibility with soils. In this study, for the efficient operation of biological control of root-knot nematodes with P. penetrans, the effects of the soils on adhesive ability of the bacterium to nematodes were examined. Southern root-knot nematodes and P. penetrans were inoculated into the 3 types of sterile soils, Kunigami Mahji, Shimajiri Mahji and Jahgaru, distributed in Okinawa Island and teh difference of adhesion of the bacterium to the nematodes were investigated. The rate of adhesion was high level even at low concentration, increasing with the concentration in other soils, and has come to the peak at the standard concentration (P2 : 50,000/g). The difference among the soils in pH and chemical concentration were also investigated. There was no significant difference in pH among the soils. The adhesive level was better in Shimajiri Mahji which had high aluminum content. When aluminum chloride (0.1%) was added to pure water, the rate of adhesion was significantly increase.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3618
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.49 p.25 -31
Appears in Collections:No.49 (2002/12)

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