Effect of some biotic and abiotic factors on the endospore adherence and development of bacterial parasite, Pasteuria penetrans on meloidogyne javanica

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dc.contributor.advisorWalia, R. K.
dc.contributor.authorJasbit Singh
dc.date.accessioned2016-11-08T14:44:48Z
dc.date.available2016-11-08T14:44:48Z
dc.date.issued2011
dc.description.abstractInfluence of plant root exudates, and culture filtrates (CFs) of rhizobacteria and fungi on the attachment of Pasteuria penetrans endospores to J2 of Meloidogyne javanica was studied in lab experiments. Soil leachate did not affect the endospore attachment. Endospore attachment increased significantly with time. Brinjal, tomato, chickpea and onion root exudates enhanced endospore attachment. Garden bean root exudates promoted the growth and multiplication of protozoans that decreased the number of leftover endospores drastically. CFs of Azotobacter chroococcum, Gluconoacetobacter diazotrophicus and Providentia rettgeri promoted, while that of Enterobacter cloacae reduced the endospore attachment to J2 of M. javanica. The CFs (autoclaved or not) of soil fungi adversely affected the endospore attachment to nematode juveniles. Studies on attempted in vitro culture of P. penetrans in CFs of rhizobacteria revealed the growth of P. penetrans-like stages (tetrads, diads etc.) only in case of A. chroococcum, E. cloacae and G. diazotrophicus. In a screen-house experiment to study the development of P. penetrans during rabi season, it was observed that the life cycle of host nematode M. javanica was prolonged; although eggs were formed in the genital tracts of females but no egg masses were formed till the end of March. The sporogenesis phase of P. penetrans did not occur in any of the five sets inoculated on different dates. P. penetrans development was restricted to vegetative phase only (microcolonies and thallus stages). The nematode development continued albeit slowly; while that of bacterium failed to synchronize with that of nematode.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/84486
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subNematology
dc.subjectSowing, Vegetative propagation, Germinability, Biological development, Biological phenomena, Drying, Developmental stages, Genetics, Attitude, Biomassen_US
dc.these.typeM.Sc
dc.titleEffect of some biotic and abiotic factors on the endospore adherence and development of bacterial parasite, Pasteuria penetrans on meloidogyne javanicaen_US
dc.typeThesisen_US
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