Fitopatologia Brasileira (2003) 28, 267-272

Adriana K. Rodrigues, Leandro G. Freitas, Aristéa A. Azevedo and Silamar Ferraz (2003)
Desenvolvimento de Pasteuria penetrans em Meloidogyne spp. parasitando diferentes espécies vegetais
[Development of Pasteuria penetrans in Meloidogyne spp. parasitizing different host plants]
Fitopatologia Brasileira 28 (3), 267-272
Abstract: The bacterium Pasteuria penetrans is an obligate parasite of root-knot nematodes and produces spores that persist in soil for many years. At present, in vitro cultivation is not feasible, thereby requiring inoculum production in vivo cultivation, inside nematode parasitizing potted plants. In this work, the differences in the development of P. penetrans in Meloidogyne spp. parasitizing roots of tomato (Lycopersicon esculentum), gherkin (Cucumis anguria) and "camapu" (Physalis angulata) were evaluated by histopathology of infected roots. Possible reasons for the differences found were analyzed, such as change in the giant cells or nematode females. The gherkin was the worst host for inoculum production and presented abnormal giant cells. The anatomy of giant cells and the bacterium development were similar in tomato and "camapu" root systems, but the P. penetrans life cycle was slightly shorter in tomato than in camapu.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne javanica	Tomato (Solanum lycopersicum)
	Meloidogyne incognita	Tomato (Solanum lycopersicum)
Pasteuria penetrans (antagonist)	Meloidogyne javanica	Tomato (Solanum lycopersicum)
Pasteuria penetrans (antagonist)	Meloidogyne incognita	Tomato (Solanum lycopersicum)