Abstract
Results from an innovative approach to improve remediation in the rhizosphere by encouraging healthy plant growth and thus enhancing microbial activity are reported. The effect of arbuscular mycorrhizal fungi (Am) on remediation efficacy of wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH) was assessed in a pot experiment. The results of this study showed that Am inoculation enhanced dissipation amount of PAHs in planted soil, plant uptake PAHs, dissipation amount of PAHs in planted versus unplanted spiked soil and loss of PAHs by the plant-promoted biodegradation. A number of parameters were monitored including plant shoot and root dry weight, plant tissue water content, plant chlorophyll, root lipid content, oxido-reductase enzyme activities in plant and soil rhizosphere and total microbial count in the rhizospheric soil. The observed physiological data indicate that plant growth and tolerance increased with Am, but reduced by PAH. This was reflected by levels of mycorrhizal root colonization which were higher for mungbean, moderate for wheat and low for eggplant. Levels of Am colonization increased on mungbean > wheat > eggplant. This is consistent with the efficacy of plant in dissipation of PAHs in spiked soil. Highly significant positive correlations were shown between of arbuscular formation in root segments (A)) and plant water content, root lipids, peroxidase, catalase polyphenol oxidase and total microbial count in soil rhizosphere as well as PAH dissipation in spiked soil. As consequence of the treatment with Am, the plants provide a greater sink for the contaminants since they are better able to survive and grow.
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Claims 8
Claim · model-written summary
AM inoculation enhanced PAH dissipation in planted soil.
- Taxon
- wheat, mungbean and eggplant
Solanum melongena
Triticum aestivum.jpg?width=60)
Vigna radiatae1 - Treatment
- Am inoculatione0
- Interactor
- Ame0symbiont
- Outcome
- dissipation amount of PAHs in planted soile0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Am inoculation enhanced dissipation amount of PAHs in planted soil”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
AM inoculation enhanced plant uptake of PAHs.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Treatment
- Am inoculatione0
- Interactor
- Ame0symbiont
- Outcome
- plant uptake PAHse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Am inoculation enhanced dissipation amount of PAHs in planted soil, plant uptake PAHs”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
AM inoculation enhanced PAH loss through plant promoted biodegradation.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Treatment
- Am inoculatione0
- Interactor
- Ame0symbiont
- Outcome
- loss of PAHs by the plant-promoted biodegradatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Am inoculation enhanced dissipation amount of PAHs in planted soil, plant uptake PAHs, dissipation amount of PAHs in planted versus unplanted spiked soil and loss of PAHs by the plant-promoted biodegradation”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
AM increased plant growth and tolerance.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Treatment
- Ame0
- Interactor
- Ame0symbiont
- Outcome
- plant growth and tolerancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant growth and tolerance increased with Am”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
PAH reduced plant growth and tolerance.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Treatment
- PAHe0
- Outcome
- plant growth and tolerancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant growth and tolerance increased with Am, but reduced by PAH”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
AM root colonization ranked mungbean above wheat above eggplant.
Verbatim
e0“Levels of Am colonization increased on mungbean > wheat > eggplant”
Claim · model-written summary
Arbuscular formation correlated positively with plant water content, root lipids, and enzyme activity.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Organ / stage
- root segmentse0
- Interactor
- arbusculare0symbiont
- Outcome
- plant water content, root lipids, peroxidase, catalase polyphenol oxidasee0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highly significant positive correlations were shown between of arbuscular formation in root segments (A)) and plant water content, root lipids, peroxidase, catalase polyphenol oxidase”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
Claim · model-written summary
Arbuscular formation correlated positively with rhizosphere microbial count and PAH dissipation.
- Taxon
- wheat, mungbean and eggplantSolanum melongenaTriticum aestivumVigna radiatae1
- Organ / stage
- root segmentse0
- Interactor
- arbusculare0symbiont
- Outcome
- total microbial count in soil rhizosphere as well as PAH dissipation in spiked soile0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highly significant positive correlations were shown between of arbuscular formation in root segments (A)) and plant water content, root lipids, peroxidase, catalase polyphenol oxidase and total microbial count in soil rhizosphere as well as PAH dissipation in spiked soil”
e1“wheat, mungbean and eggplant grown in soil spiked with polyaromatic hydrocarbons (PAH)”
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See all 14 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.