Abstract
Abstract The effect of cadmium (Cd) toxicity on growth, lipid peroxidation, and antioxidant enzymes was studied using two rice cultivars, Bing 97252 with low and Xiushui 63 with high grain Cd accumulation. Plants were exposed to 0–5 μ M Cd in hydroponic culture. Cadmium stress inhibited plant height and chlorophyll content and altered melondialdehyde (MDA) content and the activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD). Roots and shoots responded differently to Cd in terms of antioxidant enzyme activity. Generally, the activities of SOD, POD, and CAT decreased with increase in Cd level, while the activity of MDA increased with increase in Cd level. With the increase in Cd concentration in nutrient solution, MDA content in shoots and roots of Xiushui 63 increased at a much higher rate than did that of Bing 97252 at both growth stages. At booting stage, a decrease of 46%–52% in SOD activity was noted in plant roots grown under 5 μ M Cd, while at tillering stage the decrease was 13%–19% compared with the control. A significant decrease in chlorophyll content and plant height was noted under higher Cd treatment (1.0 and 5.0 μ mol) at two stages. The higher MDA and lower chlorophyll content in the cultivar Xiushui 63 showed that it is more sensitive to Cd than the cultivar Bing 97252.
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Claims 8
Claim · model-written summary
Cadmium stress inhibited plant height and chlorophyll content in rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Cadmium stresse2
- Outcome
- plant height and chlorophyll contente2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e2“Cadmium stress inhibited plant height and chlorophyll content”
Claim · model-written summary
Activities of SOD, POD and CAT in rice decreased as Cd level increased.
- Taxon
- RiceOryza sativat0
- Treatment
- increase in Cd levele3
- Outcome
- activities of SOD, POD, and CATe3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e3“Generally, the activities of SOD, POD, and CAT decreased with increase in Cd level”
Claim · model-written summary
MDA activity in rice increased as Cd level increased.
- Taxon
- RiceOryza sativat0
- Treatment
- increase in Cd levele4
- Outcome
- activity of MDAe4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e4“while the activity of MDA increased with increase in Cd level”
Claim · model-written summary
With rising Cd concentration, MDA content in shoots and roots of Xiushui 63 increased at a much higher rate than in Bing 97252 at both growth stages.
- Taxon
- RiceOryza sativat0
- Material
- Xiushui 63e5
- Organ / stage
- shoots and rootse5
- Treatment
- Cd concentration in nutrient solutione5
- Outcome
- MDA contente5
- Direction
- increased at a much higher ratee5
- Qualifier
- at both growth stagese5
- Comparator
- Bing 97252e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e5“With the increase in Cd concentration in nutrient solution, MDA content in shoots and roots of Xiushui 63 increased at a much higher rate than did that of Bing 97252 at both growth stages”
Claim · model-written summary
At booting stage, SOD activity in roots of rice grown under 5 μ M Cd decreased by 46%–52%.
- Taxon
- RiceOryza sativat0
- Organ / stage
- plant rootse6
- Treatment
- 5 μ M Cde6
- Outcome
- SOD activitye6
- Direction
- decreasee6
- Value
- 46%–52%e6
- Qualifier
- At booting stagee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e6“At booting stage, a decrease of 46%–52% in SOD activity was noted in plant roots grown under 5 μ M Cd, while at tillering stage the decrease was 13%–19% compared with the control”
Claim · model-written summary
At tillering stage, SOD activity in rice decreased by 13%–19% compared with the control.
- Taxon
- RiceOryza sativat0
- Outcome
- SOD activitye6
- Direction
- decreasee6
- Value
- 13%–19%e6
- Qualifier
- at tillering stagee6
- Comparator
- controle6
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e6“At booting stage, a decrease of 46%–52% in SOD activity was noted in plant roots grown under 5 μ M Cd, while at tillering stage the decrease was 13%–19% compared with the control”
Claim · model-written summary
Under higher Cd treatment (1.0 and 5.0 μ mol) at two stages, chlorophyll content and plant height in rice decreased significantly.
- Taxon
- RiceOryza sativat0
- Treatment
- higher Cd treatment (1.0 and 5.0 μ mol)e7
- Outcome
- chlorophyll content and plant heighte7
- Direction
- decreasee7
- Qualifier
- at two stagese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e7“A significant decrease in chlorophyll content and plant height was noted under higher Cd treatment (1.0 and 5.0 μ mol) at two stages”
Claim · model-written summary
Xiushui 63 was more sensitive to Cd than Bing 97252, shown by higher MDA and lower chlorophyll content.
- Taxon
- RiceOryza sativat0
- Material
- Xiushui 63e1
- Treatment
- Cde1
- Outcome
- higher MDA and lower chlorophyll contente1
- Direction
- more sensitivee1
- Comparator
- Bing 97252e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice Cultivars”
e1“The higher MDA and lower chlorophyll content in the cultivar Xiushui 63 showed that it is more sensitive to Cd than the cultivar Bing 97252”
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