Rhizoremediation: A Beneficial Plant-Microbe Interaction

Kuiper, Irene; Lagendijk, Ellen; Bloemberg, Guido V.; Lugtenberg, Ben

doi:10.1094/mpmi.2004.17.1.6

Cited by 753 publications

(418 citation statements)

References 124 publications

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“…Plants in phytoremediation of hydrocarbon contaminants have been proposed to improve degradation conditions in soil (Kuiper et al, 2004), and some improvement in biodegradation has been observed in plant microcosms/microecosystems (Miya and Firestone, 2000). Plant-associated microbes, especially in the root zone, potentially play a central role in rhizoremediation (Parrish et al, 2004;White et al, 2006) because plants mediate a rhizosphere effect illustrated by plant-specific microbial communities (Smalla et al, 2001;Costa et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

High aromatic ring-cleavage diversity in birch rhizosphere: PAH treatment-specific changes of I.E.3 group extradiol dioxygenases and 16S rRNA bacterial communities in soil

Sipilä

Keskinen²,

Akerman³

et al. 2008

The ISME Journal

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Genes encoding key enzymes of catabolic pathways can be targeted by DNA fingerprinting to explore genetic degradation potential in pristine and polluted soils. We performed a greenhouse microcosm experiment to elucidate structural and functional bacterial diversity in polyaromatic hydrocarbon (PAH)-polluted soil and to test the suitability of birch (Betula pendula) for remediation. Degradation of PAHs was analysed by high-performance liquid chromatography, DNA isolated from soil amplified and fingerprinted by restriction fragment length polymorphism (RFLP) and terminal restriction fragment length polymorphism (T-RFLP). Bacterial 16S rRNA T-RFLP fingerprinting revealed a high structural bacterial diversity in soil where PAH amendment altered the general community structure as well as the rhizosphere community. Birch augmented extradiol dioxygenase diversity in rhizosphere showing a rhizosphere effect, and further pyrene was more efficiently degraded in planted pots. Degraders of aromatic compounds upon PAH amendment were shown by the changed extradiol ring-cleavage community structure in soil. The RFLP analysis grouped extradiol dioxygenase marker genes into 17 distinct operational taxonomic units displaying novel phylogenetic clusters of ring-cleavage dioxygenases representing putative catabolic pathways, and the peptide sequences contained conserved amino-acid signatures of extradiol dioxygenases. A branch of major environmental TS cluster was identified as being related to Parvibaculum lavantivorans ring-cleavage dioxygenase. The described structural and functional diversity demonstrated a complex interplay of bacteria in PAH pollution. The findings improve our understanding of rhizoremediation and unveil the extent of uncharacterized enzymes and may benefit bioremediation research by facilitating the development of molecular tools to detect and monitor populations involved in degradative processes.

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Section: Introductionmentioning

confidence: 99%

High aromatic ring-cleavage diversity in birch rhizosphere: PAH treatment-specific changes of I.E.3 group extradiol dioxygenases and 16S rRNA bacterial communities in soil

Sipilä

Keskinen²,

Akerman³

et al. 2008

The ISME Journal

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“…Phytoremediation of organic xenobiotics is based on interactions between plants and their associated microorganisms in a process whereby plants draw pollutants, including polyaromatic hydrocarbons, into their rhizosphere via the transpiration stream, subsequently, microorganisms mediated degradation occurs in plant itself, in the rhizosphere or in both [22].…”

Section: Discussionmentioning

confidence: 99%

Transformation of pWWO in Rhizobium leguminosarum DPT to Engineer Toluene Degrading Ability for Rhizoremediation

Goel¹,

Pandey

Sood³

et al. 2011

Indian J Microbiol

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Rhizoremediation of organic xenobiotics is based on interactions between plants and their associated micro-organisms. The present work was designed to engineer a bacterial system having toluene degradation ability along with plant growth promoting characteristics for effective rhizoremediation. pWWO harboring the genes responsible for toluene breakdown was isolated from Pseudomonas putida MTCC 979 and successfully transformed in Rhizobium DPT. This resulted in a bacterial strain (DPT T ) which had the ability to degrade toluene as well as enhance growth of host plant. The frequency of transformation was recorded 5.7 9 10 -6 . DPT produced IAA, siderophore, chitinase, HCN, ACC deaminase, solubilized inorganic phosphate, fixed atmospheric nitrogen and inhibited the growth of Fusarium oxysporum and Macrophomina phaseolina in vitro. During pot assay, 50 ppm toluene in soil was found to inhibit the germination of Cajanus cajan seeds. However when the seeds bacterized with toluene degrading P. putida or R. leguminosarum DPT were sown in pots, again no germination was observed. Non-bacterized as well as bacterized seeds germinated successfully in toluene free soil as control. The results forced for an alternative mode of application of bacteria for rhizoremediation purpose. Hence bacterial suspension was mixed with soil having 50 ppm of toluene. Germination index in DPT treated soil was 100% while in P. putida it was 50%. Untreated soil with toluene restricted the seeds to germinate.

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“…Rhizoremediation is the most emerging, ecofriendly and potentially effective process of biodegradation of cadmium in the soil. It involves removal of specific contaminants from contaminated sites by mutual interaction of plant roots and suitable microbial species 47 ( Figure 7). Rhizosphere is a micro-environment where microorganisms (PGPR) form special types of communities with plant growth promoting capabilities 48 , and remove the toxic contaminants 49 .…”

Section: Role Of Microorganisms In the Enhancement Of Phytoremediationmentioning

confidence: 99%

PGPR-Assisted Phytoremediation of Cadmium:An Advancement towards Clean Environment

2017

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One of the major problems, that the world is facing today due to rapid industrialization is environmental pollution caused by several factors, including heavy metals. Among the heavy metals, cadmium is a hazardous carcinogenic element. From contaminated soil, cadmium enters the plants through the roots and is accumulated in the harvestable (edible) parts, and thus gains entry into the food cycle. Phytoremediation plays a beneficial role in the remediation of cadmium contamination from soil, but becomes less effective with increasing toxicity. Even hyperaccumulator plants fail to perform under these conditions. Plant growth promoting rhizobacteria (PGPR), inhabitants of the plant rhizosphere, play a supporting role and promote bioremediation of soil by accumulation or transformation of contaminants, thereby enhancing plant growth and development. This article focuses on cadmium contamination and PGPR-assisted phytoremediation of cadmium-contaminated soils.

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Rhizoremediation: A Beneficial Plant-Microbe Interaction

Cited by 753 publications

References 124 publications

High aromatic ring-cleavage diversity in birch rhizosphere: PAH treatment-specific changes of I.E.3 group extradiol dioxygenases and 16S rRNA bacterial communities in soil

High aromatic ring-cleavage diversity in birch rhizosphere: PAH treatment-specific changes of I.E.3 group extradiol dioxygenases and 16S rRNA bacterial communities in soil

Transformation of pWWO in Rhizobium leguminosarum DPT to Engineer Toluene Degrading Ability for Rhizoremediation

PGPR-Assisted Phytoremediation of Cadmium:An Advancement towards Clean Environment

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