Abstract
With the growth of industry and the increasing consumption of chemicals, their entrance into water, soil and air results in the contamination of environment and consequently the danger that humans face, resulting from heavy metals, is felt more than ever before. Phytoremediation is an environmentally friendly method employing plants for removing pollutants from contaminated soils. The present study was carried out under greenhouse conditions using factorial experiment based on the randomized complete blocks design in three replications in order to analyze the phytoremediation ability of Vetiveria zizanioides and Medicago sativa in soils contaminated with selenium. Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated. Sixty days after the treatments, the plants were harvested. The results showed that in both Vetiveria zizanioides and Medicago sativa the effect of selenium in all the studied traits was significant (P<0.01). In both plants, with an increase in the amount of selenium in the soil, the dry weights of the organs decreased and the concentration of selenium in different organs increased. At every level of soil contamination the concentration of selenium in the different organs of Vetiver were higher than alfalfa. Since the transfer and absorption factors in the root and aerial parts of Vetiver were greater than that of Medicago, Vetiver has great ability in absorption and transfer of selenium from soil to shoot in comparison with alfalfa and is a more suitable plant for phytoremediation.
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Claims 9
Claim · model-written summary
In vetiver, the effect of selenium on all studied traits was significant (P<0.01).
- Taxon
- Vetiveria zizanioides
Chrysopogon zizanioidese0 - Treatment
- 0, 10 and 20 mg/Kg selenium in the soile1
- Outcome
- all the studied traitse0
- Value
- P<0.01e0
- Setting
- greenhouse conditionse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that in both Vetiveria zizanioides and Medicago sativa the effect of selenium in all the studied traits was significant (P<0.01)”
e1“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
e2“The present study was carried out under greenhouse conditions”
Claim · model-written summary
In alfalfa, the effect of selenium on all studied traits was significant (P<0.01).
- Taxon
- Medicago sativa
Medicago sativae0 - Treatment
- 0, 10 and 20 mg/Kg selenium in the soile1
- Outcome
- all the studied traitse0
- Value
- P<0.01e0
- Setting
- greenhouse conditionse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that in both Vetiveria zizanioides and Medicago sativa the effect of selenium in all the studied traits was significant (P<0.01)”
e1“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
e2“The present study was carried out under greenhouse conditions”
Claim · model-written summary
In vetiver, dry weights of the organs decreased as soil selenium increased.
- Taxon
- Vetiveria zizanioidesChrysopogon zizanioidese2
- Treatment
- an increase in the amount of selenium in the soile1
- Outcome
- dry weights of the organse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry weights of the organs decreased and the concentration of selenium in different organs increased”
e1“with an increase in the amount of selenium in the soil”
e2“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
Claim · model-written summary
In vetiver, selenium concentration in different organs increased as soil selenium increased.
- Taxon
- Vetiveria zizanioidesChrysopogon zizanioidese2
- Organ / stage
- different organse0
- Treatment
- an increase in the amount of selenium in the soile1
- Outcome
- concentration of selenium in different organse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry weights of the organs decreased and the concentration of selenium in different organs increased”
e1“with an increase in the amount of selenium in the soil”
e2“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
Claim · model-written summary
In alfalfa, dry weights of the organs decreased as soil selenium increased.
- Taxon
- Medicago sativaMedicago sativae2
- Treatment
- an increase in the amount of selenium in the soile1
- Outcome
- dry weights of the organse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry weights of the organs decreased and the concentration of selenium in different organs increased”
e1“with an increase in the amount of selenium in the soil”
e2“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
Claim · model-written summary
In alfalfa, selenium concentration in different organs increased as soil selenium increased.
- Taxon
- Medicago sativaMedicago sativae2
- Organ / stage
- different organse0
- Treatment
- an increase in the amount of selenium in the soile1
- Outcome
- concentration of selenium in different organse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry weights of the organs decreased and the concentration of selenium in different organs increased”
e1“with an increase in the amount of selenium in the soil”
e2“Five-kilogram pots of Vetiveria zizanioides and Medicago sativa with 0, 10 and 20 mg/Kg selenium in the soil were treated”
Claim · model-written summary
Vetiver had higher selenium concentration in its different organs than alfalfa at every level of soil contamination.
- Taxon
- VetiverChrysopogon zizanioidese0
- Organ / stage
- different organse0
- Treatment
- soil contaminatione0
- Outcome
- concentration of seleniume0
- Direction
- highere0
- Comparator
- alfalfae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At every level of soil contamination the concentration of selenium in the different organs of Vetiver were higher than alfalfa”
Claim · model-written summary
Vetiver had greater transfer and absorption factors in root and aerial parts than Medicago.
- Taxon
- VetiverChrysopogon zizanioidese0
- Organ / stage
- root and aerial partse0
- Outcome
- transfer and absorption factorse0
- Direction
- greatere0
- Comparator
- Medicagoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transfer and absorption factors in the root and aerial parts of Vetiver were greater than that of Medicago”
Claim · model-written summary
Vetiver is a more suitable plant for phytoremediation than alfalfa.
- Taxon
- VetiverChrysopogon zizanioidese0
- Outcome
- more suitable plant for phytoremediatione0
- Comparator
- alfalfae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vetiver has great ability in absorption and transfer of selenium from soil to shoot in comparison with alfalfa and is a more suitable plant for phytoremediation”
The same questions in other papers
selenium atom · growth · Medicago sativa (alfalfa)Results differ
4 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
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See all 13 papers →selenium atom · molecular: metabolites · Medicago sativa (alfalfa)Results agree
10 papers in the same direction as this paper
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →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.