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Toxicity of 2,4-diacetylphloroglucinol (DAPG) to Plant-parasitic and Bacterial-feeding Nematodes

文献类型： 外文期刊

作者： Meyer, Susan L. F. 1 ; Halbrendt, John M. 2 ; Carta, Lynn K. 1 ; Skantar, Andrea M. 1 ; Liu, Ting 3 ; Abdelnabby, H 1 ;

作者机构： 1.ARS, USDA, Nematol Lab, Henry A Wallace Beltsville Agr Res Ctr W, Beltsville, MD 20705 USA

2.Penn State Univ, Fruit Res & Extens Ctr, Biglerville, PA 17307 USA

3.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 100097, Peoples R China

4.Benha Univ, Dept Plant Protect, Fac Agr, Qaliubia, Egypt

5.ARS, USDA, Biometr Consulting Serv, BARC W, Beltsville, MD 20705 USA

关键词： biological control;Caenorhabditis elegans;Heterodera glycines;management;Meloidogyne incognita;Pratylenchus scribneri;Pristionchus pacificus;Pseudomonas fluorescens;Rhabditis rainai;Xiphinema americanum

期刊名称：JOURNAL OF NEMATOLOGY （ 影响因子：1.402； 五年影响因子：2.012 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The antibiotic 2,4-diacetylphloroglucinol (DAPG) is produced by some isolates of the beneficial bacterium Pseudomonas fluorescens. DAPG is toxic to many organisms, and crop yield increases have been reported after application of DAPG-producing P. fluorescens. This study was conducted to determine whether DAPG is toxic to selected nematodes. The plant-parasitic nematodes Heterodera glycines, Meloidogyne incognita, Pratylenchus scribneri and Xiphinema americanum, and the bacterial-feeding nematodes Caenorhabditis elegans, Pristionchus pacificus, and Rhabditis rainai, were immersed in concentrations ranging from 0 to 100 jxg/ml DAPG. Egg hatch and viability of juveniles and adults were determined. DAPG was toxic to X. americanum adults, with an LD50 of8.3 u,g/ml DAPG. DAPG decreased M. incognita egg hatch, but stimulated C. elegans hatch during the first hours of incubation. Viability of M. incognita J2 and of C. elegans Jl and adults was not affected. There were no observed effects on the other nematodes. The study indicated that DAPG is not toxic to all nematodes, and did not affect the tested species of beneficial bacterial-feeding nematodes. Augmentation of DAPG-producing P. fluorescens populations for nematode biocontrol could be targeted to specific nematode species known to be affected by this compound and by other antibiotics produced by the bacteria, or these bacteria could be used for other possible effects, such as induced plant resistance.

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