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Influence of temperature on the motility of Pseudomonas oryzihabitans and control of Globodera rostochiensis |
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| Authors: | FI AndreoglouIK Vagelas M Wood HY SamalievSR Gowen |
| Institution: | a Department of Agriculture, The University of Reading, Earley Gate, P.O. Box 236, Reading, Berkshire RG6 6AT, UK b Department of Soil Science, The University of Reading, Whiteknights, P.O. Box 233, Reading, Berkshire RG6 6DW, UK c Department of Entomology, 12 D. Mendeleev Str., Agricultural University, Plovdiv 4000, Bulgaria |
| Abstract: | The motility and efficacy of Pseudomonas oryzihabitans as a biocontrol agent against the potato cyst nematode Globodera rostochiensis were studied with respect to temperature. The influence of soil moisture on bacterial movement was also tested. In a closed container trial, P. oryzihabitans significantly reduced invasion of second stage juveniles (J2) of G. rostochiensis in potato roots, its effect being more marked at 25 and 21 °C than at 17 °C. P. oryzihabitans motility in vitro was optimal at 26 °C and inhibited at temperatures below 18 °C. In soil, both temperature and matric potential affected bacterial movement. At 16 °C its movement and survival were suppressed, but they were unaffected at 25 °C. At both temperatures the biocontrol agent moved faster in the wetter (−0.03 MPa) than in the drier soil (−0.1 MPa). These results suggest that temperature is a key factor in determining the potential of P. oryzihabitans as a biocontrol agent. |
| Keywords: | Matric potential Temperature Pseudomonas oryzihabitans Globodera rostochiensis Potato cyst nematode Invasion |
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