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Removal of organic toxic chemicals in the rhizosphere and phyllosphere of plants.

Ramos JL, Molina L, Segura A - Microb Biotechnol (2009)

View Article: PubMed Central - PubMed

Affiliation: Consejo Superior de Investigaciones Científicas, Estación Experimental del Zaidín, Department of Environmental Microbiology, Granada, Spain.

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Plants provide a series of overlapping niches for microbial development, and culture enrichment approaches and new ‘‐omic’ technologies have demonstrated that the number of microbes in the rhizosphere (soil around the roots) and phyllosphere (leave surfaces) of plants is larger than expected... On the other hand, metabolite analysis and stable isotope probe techniques, as well as other approaches have shown that microbes associated to plants are metabolically active (Fig.  1)... These studies have revealed the mechanisms underlying microbe–plant interactions and we predict that this knowledge will contribute to recognize the best plant–bacteria combination and establish the optimal induction of catabolic pathways in sites undergoing rhizoremediation... To further support our positive view of prospects in bioremediation we can state that some products present in natural root exudates can act as inducers of different catabolic pathways for the degradation of contaminants... We predict future studies on root/leaf bacterial metabolomes and transcriptomes of plant‐bacteria interactions during remediation to establish the best ways to introduce catabolic pathways in sites undergoing remediation... Having said this, successful rhizosphere colonization does not only depend on the interactions between the plant and the microorganism of interest, but also on the interactions with other microorganisms... New techniques to study population changes have greatly improved over the last few years and they are and will be used to determine the changes that the introduction of new microorganisms in the ecosystem will cause and how it might affect the sustainability of the ecosystem in long run... An important problem is that of reducing pollutants that are associated to air particles... We also envision research in the area of air decontamination to reveal the full remediation potential of microbes in an area where there is little study... It has been argued that beneficial plant endophytes, bacteria that colonize the internal tissues of the plant without causing negative effects, could be an alternative in bioremediation since microbes would be somehow physically protected from adverse changes in the environment... However, successful remediation by endophytic bacteria requires the transport of the contaminant to the plant's interior... Research in this area will reveal whether or not endophytes are of interest in bioremediation. ) showed improvement in toluene phytoremediation using engineered endophytic bacteria.

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Molecular approaches in rhizoremediation and phylloremediation.
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f1: Molecular approaches in rhizoremediation and phylloremediation.

Mentions: In recent years knowledge has been gathered on the removal of contaminants by microbes living in plant niches. Plants provide a series of overlapping niches for microbial development, and culture enrichment approaches and new ‘‐omic’ technologies have demonstrated that the number of microbes in the rhizosphere (soil around the roots) and phyllosphere (leave surfaces) of plants is larger than expected. On the other hand, metabolite analysis and stable isotope probe techniques, as well as other approaches have shown that microbes associated to plants are metabolically active (Fig. 1). The ability of the microorganisms to proliferate to high densities in the plant's niche depends on the plant providing an appropriate surface for the microbes' development and, most importantly, on providing nutrients that fulfil the carbon, nitrogen and other elements demands, as well as energy needs. Looking at microbes as bioremediation catalysts, one can say that proliferation of microbes to high cell densities in the plant niches acts as a multiplier and can lead to an increase in the efficiency of pollutant removal if the resident microbes are endowed with the appropriate catabolic potential.


Removal of organic toxic chemicals in the rhizosphere and phyllosphere of plants.

Ramos JL, Molina L, Segura A - Microb Biotechnol (2009)

Molecular approaches in rhizoremediation and phylloremediation.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3815828&req=5

f1: Molecular approaches in rhizoremediation and phylloremediation.
Mentions: In recent years knowledge has been gathered on the removal of contaminants by microbes living in plant niches. Plants provide a series of overlapping niches for microbial development, and culture enrichment approaches and new ‘‐omic’ technologies have demonstrated that the number of microbes in the rhizosphere (soil around the roots) and phyllosphere (leave surfaces) of plants is larger than expected. On the other hand, metabolite analysis and stable isotope probe techniques, as well as other approaches have shown that microbes associated to plants are metabolically active (Fig. 1). The ability of the microorganisms to proliferate to high densities in the plant's niche depends on the plant providing an appropriate surface for the microbes' development and, most importantly, on providing nutrients that fulfil the carbon, nitrogen and other elements demands, as well as energy needs. Looking at microbes as bioremediation catalysts, one can say that proliferation of microbes to high cell densities in the plant niches acts as a multiplier and can lead to an increase in the efficiency of pollutant removal if the resident microbes are endowed with the appropriate catabolic potential.

View Article: PubMed Central - PubMed

Affiliation: Consejo Superior de Investigaciones Científicas, Estación Experimental del Zaidín, Department of Environmental Microbiology, Granada, Spain.

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

Plants provide a series of overlapping niches for microbial development, and culture enrichment approaches and new ‘‐omic’ technologies have demonstrated that the number of microbes in the rhizosphere (soil around the roots) and phyllosphere (leave surfaces) of plants is larger than expected... On the other hand, metabolite analysis and stable isotope probe techniques, as well as other approaches have shown that microbes associated to plants are metabolically active (Fig.  1)... These studies have revealed the mechanisms underlying microbe–plant interactions and we predict that this knowledge will contribute to recognize the best plant–bacteria combination and establish the optimal induction of catabolic pathways in sites undergoing rhizoremediation... To further support our positive view of prospects in bioremediation we can state that some products present in natural root exudates can act as inducers of different catabolic pathways for the degradation of contaminants... We predict future studies on root/leaf bacterial metabolomes and transcriptomes of plant‐bacteria interactions during remediation to establish the best ways to introduce catabolic pathways in sites undergoing remediation... Having said this, successful rhizosphere colonization does not only depend on the interactions between the plant and the microorganism of interest, but also on the interactions with other microorganisms... New techniques to study population changes have greatly improved over the last few years and they are and will be used to determine the changes that the introduction of new microorganisms in the ecosystem will cause and how it might affect the sustainability of the ecosystem in long run... An important problem is that of reducing pollutants that are associated to air particles... We also envision research in the area of air decontamination to reveal the full remediation potential of microbes in an area where there is little study... It has been argued that beneficial plant endophytes, bacteria that colonize the internal tissues of the plant without causing negative effects, could be an alternative in bioremediation since microbes would be somehow physically protected from adverse changes in the environment... However, successful remediation by endophytic bacteria requires the transport of the contaminant to the plant's interior... Research in this area will reveal whether or not endophytes are of interest in bioremediation. ) showed improvement in toluene phytoremediation using engineered endophytic bacteria.

Show MeSH