Abstract
The growth, lipid peroxidation and antioxidant enzyme system of two rice cultivars (Bing 97252, low grain Cd accumulation, and Xiushui 63, high grain Cd accumulation) were studied with a hydroponic experiment under four Cd levels (0.0, 0.1, 1.0 and 5.0 μmol/L). Cd stress reduced plant height and chlorophyll content in rice leaf, altered malondialdehyde (MDA) content and activities of superoxide dismutase (SOD), catalase(CAT) and peroxidase (POD) in rice leaf. Roots and shoots of rice plants responded differently to Cd stress in terms of antioxidant enzyme activity. Generally, the activities of SOD, POD and CAT in shoots and roots dropped with increase of Cd level, while MDA content increased with Cd level, which would be more pronounced in Xiushui 63 than Bing 97252. At booting stage a decrease of 46-52% in SOD activity was noted in the roots of plants exposed to 5.0 μmol/L Cd, while at tillering stage the decrease was 13-19% compared to the control. A significant decrease in chlorophyll content in rice leaf and plant height was noted in higher Cd treatment (1.0 and 5.0 μmol/L). The higher MDA and less chlorophyll content were found in Xiushui 63, indicating that Xiushui 63 was more sensitive to Cd stress than Bing 97252.
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Claims 9
Claim · model-written summary
Cadmium stress reduced rice height and leaf chlorophyll.
- Taxon
- rice
Oryza sativae0 - Treatment
- Cd stresse0
- Outcome
- plant height and chlorophyll content in rice leafe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
Cadmium altered leaf MDA and SOD, CAT and POD activity.
- Taxon
- riceOryza sativae0
- Treatment
- Cd stresse1
- Outcome
- malondialdehyde (MDA) content and activities of superoxide dismutase (SOD), catalase(CAT) and peroxidase (POD)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altered malondialdehyde (MDA) content and activities of superoxide dismutase (SOD), catalase(CAT) and peroxidase (POD) in rice leaf”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
Root and shoot antioxidant activity responded differently to cadmium.
- Taxon
- riceOryza sativae0
- Organ / stage
- Roots and shootse0
- Outcome
- antioxidant enzyme activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots and shoots of rice plants responded differently to Cd stress in terms of antioxidant enzyme activity”
Claim · model-written summary
Increasing cadmium reduced shoot and root SOD, POD and CAT activities.
- Taxon
- riceOryza sativae1
- Treatment
- Cd levele0
- Outcome
- activities of SOD, POD and CAT in shoots and rootse0
- Direction
- droppede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of SOD, POD and CAT in shoots and roots dropped with increase of Cd level”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
MDA content increased with cadmium level, especially in Xiushui 63.
- Taxon
- riceOryza sativae1
- Material
- Xiushui 63e0
- Treatment
- Cd levele0
- Outcome
- MDA contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content increased with Cd level, which would be more pronounced in Xiushui 63 than Bing 97252”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
At booting under 5.0 μmol/L Cd, root SOD fell 46-52%.
- Taxon
- riceOryza sativae1
- Organ / stage
- booting stagee0
- Treatment
- 5.0 μmol/L Cde0
- Outcome
- SOD activitye0
- Direction
- decreasee0
- Value
- 46-52%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At booting stage a decrease of 46-52% in SOD activity was noted in the roots of plants exposed to 5.0 μmol/L Cd”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
At tillering, root SOD fell 13-19% relative to control.
- Taxon
- riceOryza sativae1
- Organ / stage
- tillering stagee0
- Treatment
- Cde3
- Outcome
- SOD activitye2
- Direction
- decreasee0
- Value
- 13-19%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while at tillering stage the decrease was 13-19% compared to the control”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
e2“At booting stage a decrease of 46-52% in SOD activity was noted in the roots of plants exposed to 5.0 μmol/L Cd”
e3“Cd stress reduced plant height and chlorophyll content in rice leaf”
Claim · model-written summary
Higher cadmium significantly reduced chlorophyll and height.
- Taxon
- riceOryza sativae0
- Treatment
- higher Cd treatment (1.0 and 5.0 μmol/L)e0
- Outcome
- chlorophyll content in rice leaf and plant heighte0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant decrease in chlorophyll content in rice leaf and plant height was noted in higher Cd treatment (1.0 and 5.0 μmol/L)”
Claim · model-written summary
Xiushui 63 had higher MDA and less chlorophyll than Bing 97252, indicating greater cadmium sensitivity.
- Taxon
- riceOryza sativae1
- Material
- Xiushui 63e0
- Outcome
- higher MDA and less chlorophyll contente0
- Comparator
- Bing 97252e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher MDA and less chlorophyll content were found in Xiushui 63, indicating that Xiushui 63 was more sensitive to Cd stress than Bing 97252”
e1“Cd stress reduced plant height and chlorophyll content in rice leaf”
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See all 23 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.