Abstract
Cd can damage plant to accumulate active oxygen in plant tissue. The accumulation of active oxygen is due to the unbalance between the production and elimination of active oxygen in plant tissue, which causes the lipid peroxidation of plant cell membrane, and damages the plants. Alleviative effects of different concentration(0.1, 1.0, 2.5, 5.0 mmol·L-1)Ascorbic acid(AsA)on rape seedlings treated by 25 mg·L-1CdCl2·2.5H2O were studied. 2 days after Cd treatment, AsA was applied 5 times at the intervals of 2 days. Results showed that the 25 mg·L-1CdCl2·2.5H2O treatment inhibited the growth of seedlings and caused a significant increase in malondialdehyde(MDA)content which was the product of lipid peroxidation. Significant increase of lipid peroxidation degree in the rape seedlings was mainly due to the decrease in the capability of protective enzymes to eliminate base oxygenic ions. Cd stress decreased the activities of the superoxide dismutase(SOD), catalase(CAT)and peroxidase(POD), contents of chlorophyll a, chlorophyll b and carotenoid in the seedling leaf. With the application of different concentration of ASA, it showed that low concentration AsA could alleviate Cd stress of rape seedlings effectively. 0.1 mmol·L-1AsA enhanced the biomass, chlorophyll and carotenoid contents. Also the activities of antioxidant enzymes SOD, CAT and POD were increased significantly, which could eliminate base oxygenic ions in time and restrained lipid peroxidation in the rape seedlings under Cd stress. The transportantion of Cd from root to shoot was obviously suppressed. Cd content and Cd accumulation in root, Cd accumulation in shoot increased, while Cd content in shoot decreased significantly. It suggested that 0.1mmol·L-1AsA had good alleviative effects on Cd intimidation, but too high concentration of AsA(2.5、5.0mmol·L-1)and appling frequency did some damage to rape seedlings, instead.
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Claims 13
Claim · model-written summary
Cadmium inhibited rape seedling growth.
- Taxon
- rape seedlings
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- 25 mg·L-1CdCl2·2.5H2Oe0
- Outcome
- growth of seedlingse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“the 25 mg·L-1CdCl2·2.5H2O treatment inhibited the growth of seedlings”
t0“rape seedlings”
Claim · model-written summary
Cadmium significantly increased malondialdehyde content.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- 25 mg·L-1CdCl2·2.5H2Oe0
- Outcome
- malondialdehyde(MDA)contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“25 mg·L-1CdCl2·2.5H2O treatment inhibited the growth of seedlings and caused a significant increase in malondialdehyde(MDA)content”
t0“rape seedlings”
Claim · model-written summary
Cadmium decreased SOD, CAT and POD activities.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- Cd stresse0
- Outcome
- activities of the superoxide dismutase(SOD), catalase(CAT)and peroxidase(POD)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress decreased the activities of the superoxide dismutase(SOD), catalase(CAT)and peroxidase(POD)”
t0“rape seedlings”
Claim · model-written summary
Cadmium decreased leaf chlorophyll a, chlorophyll b and carotenoid contents.
- Taxon
- rape seedlingsBrassica napust0
- Organ / stage
- seedling leafe0
- Treatment
- Cd stresse0
- Outcome
- contents of chlorophyll a, chlorophyll b and carotenoide0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress decreased the activities of the superoxide dismutase(SOD), catalase(CAT)and peroxidase(POD), contents of chlorophyll a, chlorophyll b and carotenoid in the seedling leaf.”
t0“rape seedlings”
Claim · model-written summary
Low AsA concentration alleviated cadmium stress in rape seedlings.
- Taxon
- rape seedlingsBrassica napuse0
- Treatment
- low concentration AsAe0
- Outcome
- Cd stress of rape seedlingse0
- Direction
- alleviatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low concentration AsA could alleviate Cd stress of rape seedlings effectively.”
Claim · model-written summary
0.1 mmol·L-1 AsA increased seedling biomass.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- 0.1 mmol·L-1AsAe0
- Outcome
- biomasse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.1 mmol·L-1AsA enhanced the biomass, chlorophyll and carotenoid contents.”
t0“rape seedlings”
Claim · model-written summary
0.1 mmol·L-1 AsA increased chlorophyll and carotenoid contents.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- 0.1 mmol·L-1AsAe0
- Outcome
- chlorophyll and carotenoid contentse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.1 mmol·L-1AsA enhanced the biomass, chlorophyll and carotenoid contents.”
t0“rape seedlings”
Claim · model-written summary
AsA significantly increased SOD, CAT and POD activities under Cd stress.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- AsAt0
- Outcome
- activities of antioxidant enzymes SOD, CAT and PODe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of antioxidant enzymes SOD, CAT and POD were increased significantly”
t0“AsA on the Growth of Rape Seedlings Under Cd Stress”
Claim · model-written summary
AsA suppressed Cd transport from root to shoot.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- AsAt0
- Outcome
- transportantion of Cd from root to shoote0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transportantion of Cd from root to shoot was obviously suppressed.”
t0“AsA on the Growth of Rape Seedlings Under Cd Stress”
Claim · model-written summary
AsA increased root Cd content and accumulation.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- AsAt0
- Outcome
- Cd content and Cd accumulation in roote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd content and Cd accumulation in root, Cd accumulation in shoot increased”
t0“AsA on the Growth of Rape Seedlings Under Cd Stress”
Claim · model-written summary
AsA increased shoot Cd accumulation.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- AsAt0
- Outcome
- Cd accumulation in shoote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd content and Cd accumulation in root, Cd accumulation in shoot increased”
t0“AsA on the Growth of Rape Seedlings Under Cd Stress”
Claim · model-written summary
AsA significantly decreased shoot Cd content.
- Taxon
- rape seedlingsBrassica napust0
- Treatment
- AsAt0
- Outcome
- Cd content in shoote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while Cd content in shoot decreased significantly.”
t0“AsA on the Growth of Rape Seedlings Under Cd Stress”
Claim · model-written summary
High AsA concentrations damaged rape seedlings.
- Taxon
- rape seedlingsBrassica napuse0
- Treatment
- AsA(2.5、5.0mmol·L-1)e0
- Outcome
- damage to rape seedlingse0
- Direction
- damagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“too high concentration of AsA(2.5、5.0mmol·L-1)and appling frequency did some damage to rape seedlings”
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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.