A first step towards computer controlled cultivation of nematodes-growth modelling of the symbiotic bacterium Photorhabdus luminescens

2002 ◽  
Author(s):  
K. Lebert ◽  
R. Stanka ◽  
H. Roeck
Keyword(s):  
Symbiotic Bacterium ◽  
Growth Modelling ◽  
Photorhabdus Luminescens ◽  
Computer Controlled

Physico-chemical properties and mode of action of a signal from the symbiotic bacterium Photorhabdus luminescens inducing dauer juvenile recovery in the entomopathogenic nematode Heterorhabditis bacteriophora

Nematology ◽  
2001 ◽  
Vol 3 (8) ◽  
pp. 849-853 ◽  
Author(s):  
Ralf-Udo Ehlers ◽  
Jens Aumann
Keyword(s):  
Entomopathogenic Nematodes ◽  
Entomopathogenic Nematode ◽  
Chemical Properties ◽  
Symbiotic Bacterium ◽  
Heterorhabditis Bacteriophora ◽  
Juvenile Stage ◽  
Food Sources ◽  
Symbiotic Bacteria ◽  
Photorhabdus Luminescens ◽  
Physico Chemical

AbstractRecovery in entomopathogenic nematodes is the exit from the dauer juvenile stage. It is a response to environmental queues signalling the presence of food sources (e.g., insect haemolymph). The bacterium Photorhabdus luminescens excretes a signal which also induces recovery of its symbiotic Heterorhabditis bacteriophora dauer juveniles. This bacterial signal is composed of at least two compounds with different polarity. The symbiotic bacteria also secrete an antagonistic signal which inhibits nematode recovery. The recovery-inducing signal compounds have a molecular mass of less than 20 kDa and are negatively charged. The data indicate that at least one compound is smaller than 5 kDa. The bacterial signal triggers by receptor binding, the first step in a recovery-inducing muscarinic signalling pathway.

Photorhabdus luminescens subsp. noenieputensis subsp. nov., a symbiotic bacterium associated with a novel Heterorhabditis species related to Heterorhabditis indica

2013 ◽  
Vol 63 (Pt_5) ◽  
pp. 1853-1858 ◽  
Author(s):  
Tiarin Ferreira ◽  
Carol van Reenen ◽  
Sylvie Pagès ◽  
Patrick Tailliez ◽  
Antoinette P. Malan ◽  
...  
Keyword(s):  
Type Species ◽  
Galleria Mellonella ◽  
Entomopathogenic Nematode ◽  
Symbiotic Bacterium ◽  
Tween 20 ◽  
Haemolytic Activity ◽  
Phenotypic Traits ◽  
Photorhabdus Luminescens ◽  
Content Type ◽  
Link Type

The bacterial symbiont AM7T, isolated from a novel entomopathogenic nematode species of the genus Heterorhabditis, displays the main phenotypic traits of the genus Photorhabdus and is highly pathogenic to Galleria mellonella. Phylogenetic analysis based on a multigene approach (16S rRNA, recA, gyrB, dnaN, gltX and infB) confirmed the classification of isolate AM7T within the species Photorhabdus luminescens and revealed its close relatedness to Photorhabdus luminescens subsp. caribbeanensis , P. luminescens subsp. akhurstii and P. luminescens subsp. hainanensis . The five concatenated protein-encoding sequences (4197 nt) of strain AM7T revealed 95.8, 95.4 and 94.9 % nucleotide identity to sequences of P. luminescens subsp. caribbeanensis HG29T, P. luminescens subsp. akhurstii FRG04T and P. luminescens subsp. hainanensis C8404T, respectively. These identity values are less than the threshold of 97 % proposed for classification within one of the existing subspecies of P. luminescens . Unlike other strains described for P. luminescens , strain AM7T produces acid from adonitol, sorbitol and xylitol, assimilates xylitol and has no lipase activity on medium containing Tween 20 or 60. Strain AM7T is differentiated from P. luminescens subsp. caribbeanensis by the assimilation of N-acetylglucosamine and the absence of haemolytic activity. Unlike P. luminescens subsp. akhurstii , strain AM7T does not assimilate mannitol, and it is distinguished from P. luminescens subsp. hainanensis by the assimilation of trehalose and citrate, the inability to produce indole from tryptophan and the presence of acetoin production and urease activity. Strain AM7T ( = ATCC BAA-2407T  = DSM 25462T) belongs to a novel subspecies, and is proposed as the type strain of Photorhabdus luminescens subsp. noenieputensis sp. nov.

scholarly journals Crystal Structure of Oxalate Decarboxylase from Photorhabdus luminescens, A Symbiotic Bacterium Associated with Entomopathogenic Nematodes

2020 ◽  
Vol 119 (8) ◽  
pp. 1349
Author(s):  
Sreeja Chellappan ◽  
S. Mathivanan ◽  
R. Thippeswamy ◽  
M. Nagesh ◽  
H. S. Savithri ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Entomopathogenic Nematodes ◽  
Symbiotic Bacterium ◽  
Photorhabdus Luminescens ◽  
Oxalate Decarboxylase

scholarly journals Draft Genome Sequence of Photorhabdus luminescens HIM3 Isolated from an Entomopathogenic Nematode in Agricultural Soils

2017 ◽  
Vol 5 (35) ◽  
Author(s):  
Rosalba Salgado-Morales ◽  
Nancy Rivera-Gómez ◽  
Fernando Martínez-Ocampo ◽  
Luis Fernando Lozano-Aguirre Beltrán ◽  
Armando Hernández-Mendoza ◽  
...  
Keyword(s):  
Genome Size ◽  
Genome Sequence ◽  
Agricultural Soils ◽  
Entomopathogenic Nematode ◽  
Draft Genome ◽  
Symbiotic Bacterium ◽  
Draft Genome Sequence ◽  
Photorhabdus Luminescens ◽  
Content Type ◽  
Heterorhabditis Indica

ABSTRACT In this work, we report the draft genome sequence of Photorhabdus luminescens strain HIM3, a symbiotic bacterium associated with the entomopathogenic nematode Heterorhabditis indica MOR03, isolated from soil sugarcane in Yautepec, Morelos, Mexico. These bacteria have a G+C content of 42.6% and genome size of 5.47 Mb.

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