Abstract
Phytoextraction is gaining acceptance as a cost-effective and environmentally sound phytoremediation strategy for reducing toxic metal levels from contaminated soils. We hypothesized that the addition of synthetic chelates can increase the amount of bioavailable metal for root uptake, thereby improving the efficacy of phytoextraction. This study was conducted to evaluate the effects of Cadmium (Cd) and ethylenediaminetetraacetic (EDTA) on the growth, metal uptake, and chlorophyll (Chl) production in wheat plants. Wheat (Triticum aestivum L. cv TAM-109) seeds were planted in plastic tubes containing topsoil and peat (2:1, v: v) spiked with various levels (0, 250, 500 mg Cd/kg dry soil) of cadmium nitrate. After 30, 45, and 60 days of growth, plants were harvested. Results show that after 60 days, wheat biomass was greater at 100, 250, and 500 mg/kg of Cd-treated soil without the addition of EDTA as compared to plants grown in Cd-treated soil plus EDTA. Although Chl production generally decreased with increased exposure time and Cd concentration, we nonetheless observed Chl production to be higher during each harvesting period in plants exposed to Cd plus EDTA. Treatments with the highest Chl concentration occurred on day 30.
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Claims 5
Claim · model-written summary
At 60 days, wheat biomass was greater in cadmium-treated soil without EDTA than with EDTA.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Cd-treated soil without the addition of EDTAe0
- Outcome
- wheat biomasse0
- Direction
- greatere0
- Qualifier
- after 60 dayse0
- Comparator
- Cd-treated soil plus EDTAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 60 days, wheat biomass was greater at 100, 250, and 500 mg/kg of Cd-treated soil without the addition of EDTA as compared to plants grown in Cd-treated soil plus EDTA”
Claim · model-written summary
Chlorophyll production generally declined with longer exposure.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Chl productione0
- Direction
- decreasede0
- Setting
- exposure timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chl production generally decreased with increased exposure time”
e1“wheat plants”
Claim · model-written summary
Chlorophyll production generally declined as cadmium concentration rose.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Cd concentratione0
- Outcome
- Chl productione0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chl production generally decreased with increased exposure time and Cd concentration”
e1“wheat plants”
Claim · model-written summary
At each harvest, chlorophyll production was higher with cadmium plus EDTA.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Cd plus EDTAe0
- Outcome
- Chl productione0
- Direction
- highere0
- Qualifier
- during each harvesting periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chl production to be higher during each harvesting period in plants exposed to Cd plus EDTA”
e1“wheat plants”
Claim · model-written summary
The highest chlorophyll concentration occurred on day 30.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Chl concentratione0
- Direction
- higheste0
- Qualifier
- day 30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with the highest Chl concentration occurred on day 30.”
e1“wheat plants”
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