Occurrence, Transfer and Mobilization in Epilithic Strains of Acinetobacter of Mercury-resistance Plasmids Capable of Transformation

Rochelle, Paul A.; Day, Martin J.; Fry, John C.

doi:10.1099/00221287-134-11-2933

Cited by 27 publications

(26 citation statements)

References 32 publications

(18 reference statements)

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“…Although barriers related to the expression of the acquired genetic material (genes or DNA fragments) and subsequently the selection of the host in the environment are not strictly related to HGT, they will a¡ect the environmental impact of a successful transfer event [104]. Bacteria that express competence under natural conditions have been detected [88,132]. Bacteria that express competence under natural conditions have been detected [88,132].…”

Section: Possible Barriers To Horizontal Gene Transfer In Bacteriamentioning

confidence: 99%

Horizontal gene transfer from transgenic plants to terrestrial bacteria – a rare event?

Nielsen¹

1998

FEMS Microbiology Reviews

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Today, 12 years after the first field release of a genetically modified plant (GMP), over 15,000 field trials at different locations have been performed. As new and unique characteristics are frequently introduced into GMPs, risk assessment has to be performed to assess their ecological impact. The possibilities of horizontal gene transfer (HGT; no parent-to-offspring transfer of genes) from plants to microorganisms are frequently evaluated in such risk assessments of GMPs before release into the field. In this review we indicate why putative HGT from plants to terrestrial (soil and plant associated) bacteria has raised concern in biosafety evaluations. Further, we discuss possible pathways of HGT from plants to bacteria, outline the barriers to HGT in bacteria, describe the strategies used to investigate HGT from plants to bacteria and summarize the results obtained. Only a few cases of HGT from eukaryotes such as plants to bacteria have been reported to date. These cases have been ascertained after comparison of DNA sequences between plants and bacteria. Although experimental approaches in both field and laboratory studies have not been able to confirm the occurrence of such HGT to naturally occurring bacteria, recently two studies have shown transfer of marker genes from plants to bacteria based on homologous recombination. The few examples of HGT indicated by DNA sequence comparisons suggest that the frequencies of evolutionarily successful HGT from plants to bacteria may be extremely low. However, this inference is based on a small number of experimental studies and indications found in the literature. Transfer frequencies should not be confounded with the likelihood of environmental implications, since the frequency of HGT is probably only marginally important compared with the selective force acting on the outcome. Attention should therefore be focused on enhancing the understanding of selection processes in natural environments. Only an accurate understanding of these selective events will allow the prediction of possible consequences of novel genes following their introduction into open environments.

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Section: Possible Barriers To Horizontal Gene Transfer In Bacteriamentioning

confidence: 99%

Horizontal gene transfer from transgenic plants to terrestrial bacteria – a rare event?

Nielsen¹

1998

FEMS Microbiology Reviews

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“…Plasmid pQM17 which encodes resistance to mercury was introduced to HGW98(pQM17) by natural transformation (Rochelle et al, 1988).…”

Section: Methodsmentioning

confidence: 99%

Use of EDTA to prevent spontaneous cell-to-cell transformation provides a more accurate estimation of gene transfer frequencies

1996

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“…Horizontal gene transfer in microbial communities is underlain by several mechanisms, such as conjugation (due to mob-functions of transmissive plasmids), transduction [161,162], and natural transformation [163,164]. It is not infrequent that bacteria in natural populations harbor plasmids [69,[165][166][167][168][169][170][171]; genetic information contained in the latter is characterized by maximum interspecific and interstrain mobility [77,124,[172][173][174]. Multiple examples of mobilized plasmids carrying the genes that control degradation of aromatic or artificial compounds have been reported [16,38,56,175,176], and there is no need to discuss their role in the transfer of such genes between microorganism species.…”

Section: Mechanisms Of Genetic Adaptation Of Microorganisms To Utilizmentioning

confidence: 99%

10.1007/s10438-008-2001-3

2000

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Contemporary data on the mechanism of biodegradation of aromatic hydrocarbons and biodegradation genes (genomic organization and pathways of evolution) in diverse groups of microorganisms have been reviewed. Studies of this problem are topical, in view of the need in identification and construction of new strains degrading xenobiotics, particularly those halogenated. For this reason, emphasis is placed on specific features of explored metabolic pathways that can be used for constructing new enzymatic systems not present in nature. Sections on the mechanisms of genomic rearrangements involving biodegradation determinants are presented from the same standpoint. Part of the review is devoted to analyzing methods used for studying the population dynamics of bacterial communities involved in xenobiotic degradation in natural biotopes or industrial waste disposal plants. Particular attention is given to methods of gene systematics.

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Occurrence, Transfer and Mobilization in Epilithic Strains of Acinetobacter of Mercury-resistance Plasmids Capable of Transformation

Cited by 27 publications

References 32 publications

Horizontal gene transfer from transgenic plants to terrestrial bacteria – a rare event?

Horizontal gene transfer from transgenic plants to terrestrial bacteria – a rare event?

Use of EDTA to prevent spontaneous cell-to-cell transformation provides a more accurate estimation of gene transfer frequencies

10.1007/s10438-008-2001-3

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