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        Re-evaluation of the life-cycle of the nematode-parasitic bacterium Pasteuria penetrans in root-knot nematodes, Meloidogyne spp.

        Author
        Davies, Keith G.
        Rowe, Janet
        Manzanilla-Lopez, Rosa
        Opperman, Charles H.
        Attention
        2299/9681
        Abstract
        Comparisons of the growth of Pasteuria penetrans in adult root-knot nematode females infected with P. penetrans dissected from the roots of tomato plants were undertaken using bright-field and scanning electron microscopy. Samples of infected females were nutritionally compromised by maintaining them in sterile saline at 30 degrees C for different periods of time following their removal from the root system. Observations of these females maintained in saline revealed a series of growth stages of Pasteuria hitherto not documented, consisting of rhizoids, rod-like bacilli and granular masses. A new life-cycle for Pasteuria is described consisting of three phases: Phase I: attachment and germination; Phase II: rhizoid production and exponential growth; and Phase III: sporogenesis. These newly observed stages of the life cycle show a high degree of similarity to the developmental stages seen in other Bacillus spp.
        Publication date
        2011
        Published in
        Nematology
        Published version
        https://doi.org/10.1163/138855410X552670
        Other links
        http://hdl.handle.net/2299/9681
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