Abstract
Cadmium is one of the environmentally problematic heavy metals, because of its high mobility in soils, its ease and fast uptake by plantand very high toxic potential even at very low concentration. Thus its extraction from the polluted sites is environmentally important. Cadmium canbe extracted from the soils either any of expensive remediation methods or phytoextraction which is a method with easy application, natural, andincreasing usage. In this study, for fast and efficient removal of heavy metals, including Cd, Metallothionein II (MTII) gene isolated fromSaccharomyces cerevisiae (Sc) and Sporamin vacuolar targeting signal gene isolated from sweet potatoes were added for bearing transgenic plant.The experiment was set up in spilt-plot in completely randomized design with three replications. Then the non-transgenic (Nicotiana tabacum L. cvPetit Havana SR1) and transgenic tobacco plants (p-S-ScMTII) were grown in pots containing 0, 0.2, 0.4, 0.8 and 1.6 mg/kg Cd up to floweringstage. Cadmium addition resulted in a slight decrease in growth but no toxicity symptoms were observed. There were no statistical differences intransgenic and non-transgenic plants for dry biomas and Cd concentration. However, Cd concentrations of shoots of both plants were increasedupon increasing Cd concentration of soil. For 1.6 mg/kg Cd treatment, Cd concentration of transgenic and non-transgenic plants increased 13.8-32.9 fold, respectively comparing to the control. Results suggested that S-ScMTII gene bearing transgenic plant did not improve Cd uptake in thestudied range of soil Cd concentration. The efficiency of ScMTII gene for accumulation of Cd in shoots should be investigated at higher Cd concentration.
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Claims 8
Claim · model-written summary
Cadmium addition slightly decreased tobacco growth without visible toxicity symptoms.
Not reportedTaxonComparator
Verbatim
e0“Cadmium addition resulted in a slight decrease in growth but no toxicity symptoms were observed.”
Claim · model-written summary
Cadmium addition caused no visible toxicity symptoms.
Not reportedTaxon
Verbatim
e0“Cadmium addition resulted in a slight decrease in growth but no toxicity symptoms were observed.”
Claim · model-written summary
Transgenic and non-transgenic tobacco did not differ statistically in dry biomass.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- transgenice0
- Outcome
- dry biomase0
- Direction
- no statistical differencese0
- Comparator
- non-transgenic plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no statistical differences intransgenic and non-transgenic plants for dry biomas and Cd concentration.”
t0“Tobacco Plant”
Claim · model-written summary
Transgenic and non-transgenic tobacco did not differ statistically in cadmium concentration.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- transgenice0
- Outcome
- Cd concentratione0
- Direction
- no statistical differencese0
- Comparator
- non-transgenic plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no statistical differences intransgenic and non-transgenic plants for dry biomas and Cd concentration.”
t0“Tobacco Plant”
Claim · model-written summary
Shoot cadmium concentration increased with soil cadmium concentration in both plant types.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- shootse0
- Treatment
- Cd concentration of soile0
- Outcome
- Cd concentrations of shootse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd concentrations of shoots of both plants were increasedupon increasing Cd concentration of soil.”
t0“Tobacco Plant”
Claim · model-written summary
At 1.6 mg/kg soil cadmium, transgenic plant cadmium concentration increased 13.8-fold versus control.
- Taxon
- TobaccoNicotiana tabacumt0
- Material
- transgenice0
- Treatment
- 1.6 mg/kg Cd treatmente0
- Outcome
- Cd concentratione0
- Direction
- increasede0
- Value
- 13.8-32.9 folde0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For 1.6 mg/kg Cd treatment, Cd concentration of transgenic and non-transgenic plants increased 13.8-32.9 fold, respectively comparing to the control.”
t0“Tobacco Plant”
Claim · model-written summary
The authors conclude the transgene did not improve cadmium uptake in the tested soil range.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- S-ScMTII gene bearing transgenic plante0
- Gene
- S-ScMTII genee0
- Outcome
- Cd uptakee0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S-ScMTII gene bearing transgenic plant did not improve Cd uptake in thestudied range of soil Cd concentration.”
t0“Tobacco Plant”
Claim · model-written summary
The authors recommend testing shoot cadmium accumulation at higher cadmium concentration.
- Taxon
- TobaccoNicotiana tabacumt0
- Gene
- ScMTII genee0
- Outcome
- accumulation of Cd in shoots should be investigated at higher Cd concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The efficiency of ScMTII gene for accumulation of Cd in shoots should be investigated at higher Cd concentration.”
t0“Tobacco Plant”
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See all 14 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.