Abstract
In a water culture experiment, rice seedlings were grown in a nutrient solution containing 10 micromol Cd x L(-1), and harvested after different durations of growth. Two treatments were installed, i. e. , adding 50 mg Fe2+ x L(-1) to induce the formation of iron coating on seedlings root surface (treatment Fe50), and the control. The study on the dynamics of the Cd adsorption on root surface and of the Cd uptake by plant showed that both in the treatment Fe50 and in the control, the amount of adsorbed Cd on root surface was the highest in the first 2 hours, decreased dramatically then and remained relatively stable thereafter, while the Cd concentrations in roots and shoots increased slowly within the first 8 hours and rapidly then. The increment of Cd concentrations in roots and shoots was smaller in treatment Fe50 than in the control, and the amounts of adsorbed and absorbed Cd also showed the same picture, suggesting that the iron coating on rice root surface had little effect on the dynamics of Cd content in different parts of rice seedlings, and the reduced Cd uptake in treatment Fe50 was probably relevant with the Fe concentration in roots.
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Claims 6
Claim · model-written summary
Root surface Cd adsorption peaked in the first 2 hours then fell and stabilized in both treatments.
- Taxon
- rice
Oryza sativat0 - Treatment
- treatment Fe50e0
- Outcome
- amount of adsorbed Cd on root surfacee0
- Direction
- highest in the first 2 hours, decreased dramatically then and remained relatively stable thereaftere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both in the treatment Fe50 and in the control, the amount of adsorbed Cd on root surface was the highest in the first 2 hours, decreased dramatically then and remained relatively stable thereafter”
t0“rice seedlings”
Claim · model-written summary
Cd concentrations in roots and shoots rose slowly for 8 hours then rapidly.
- Taxon
- riceOryza sativat0
- Organ / stage
- roots and shootse0
- Outcome
- Cd concentrations in roots and shootse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Cd concentrations in roots and shoots increased slowly within the first 8 hours and rapidly then.”
t0“rice seedlings”
Claim · model-written summary
Fe50 reduced the increment in root and shoot Cd concentrations relative to control.
- Taxon
- riceOryza sativat0
- Treatment
- treatment Fe50e0
- Outcome
- increment of Cd concentrations in roots and shootse0
- Direction
- smallere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment of Cd concentrations in roots and shoots was smaller in treatment Fe50 than in the control”
t0“rice seedlings”
Claim · model-written summary
Fe50 reduced adsorbed and absorbed Cd relative to control.
- Taxon
- riceOryza sativat0
- Treatment
- treatment Fe50e0
- Outcome
- amounts of adsorbed and absorbed Cde0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment of Cd concentrations in roots and shoots was smaller in treatment Fe50 than in the control, and the amounts of adsorbed and absorbed Cd also showed the same picture”
t0“rice seedlings”
Claim · model-written summary
Authors suggested iron coating had little effect on Cd content dynamics.
- Taxon
- riceOryza sativae0
- Treatment
- iron coatinge0
- Outcome
- dynamics of Cd content in different parts of rice seedlingse0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the iron coating on rice root surface had little effect on the dynamics of Cd content in different parts of rice seedlings”
Claim · model-written summary
Authors suggested reduced Cd uptake in Fe50 may relate to root Fe concentration.
- Taxon
- riceOryza sativat0
- Treatment
- treatment Fe50e0
- Compound
- Fee0
- Outcome
- reduced Cd uptakee0
- Qualifier
- probably relevant with the Fe concentration in rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduced Cd uptake in treatment Fe50 was probably relevant with the Fe concentration in roots.”
t0“rice seedlings”
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