Abstract
Abstract Maize ( Zea mays L. cv. 777) plants grown in hydroponic culture were treated with 50 μ m CdSO 4 . Growth and metabolic parameters indicative of oxidative stress and antioxidant responses were studied in leaves of plants treated with Cd. Apart from increasing lipid peroxidation and H 2 O 2 accumulation, supply of Cd suppressed growth, fresh and dry mass of plants and decreased the concentrations of chloroplastic pigments. The activities of catalase (CAT; EC 1.11.1.6), peroxidase (POD; EC 1.11.1.7), ascorbate peroxidase (APX; EC 1.11.1.11) and superoxide dismutase (SOD; EC 1.15.1.1) were increased in plants supplied 50 μ m Cd. Localization of activities of isoforms of these enzymes (POD, APX and SOD) on native gels also revealed increase in the intensities of pre‐existing bands. Stimulated activities of CAT, POD, APX and SOD in maize plants supplied excess Cd do not appear to have relieved plants from excessive generation of reactive oxygen species (ROS). It is, therefore, concluded that supply of 50 μ m Cd induces oxidative stress by increasing production of ROS despite increased antioxidant protection in maize plants.
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Claims 6
Claim · model-written summary
Cadmium increased lipid peroxidation and hydrogen peroxide accumulation.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apart from increasing lipid peroxidation and H 2 O 2 accumulation, supply of Cd suppressed growth”
t0“Maize”
Claim · model-written summary
Cadmium suppressed growth and plant fresh and dry mass.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supply of Cd suppressed growth, fresh and dry mass of plants”
t0“Maize”
Claim · model-written summary
Cadmium decreased chloroplastic pigment concentrations.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supply of Cd suppressed growth, fresh and dry mass of plants and decreased the concentrations of chloroplastic pigments”
t0“Maize”
Claim · model-written summary
Cadmium increased catalase, peroxidase, ascorbate peroxidase and superoxide dismutase activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities of catalase (CAT; EC 1.11.1.6), peroxidase (POD; EC 1.11.1.7), ascorbate peroxidase (APX; EC 1.11.1.11) and superoxide dismutase (SOD; EC 1.15.1.1) were increased in plants supplied 50 μ m Cd”
t0“Maize”
Claim · model-written summary
Cadmium intensified existing POD, APX and SOD isoform bands.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Localization of activities of isoforms of these enzymes (POD, APX and SOD) on native gels also revealed increase in the intensities of pre‐existing bands”
t0“Maize”
Claim · model-written summary
The authors concluded that cadmium induced oxidative stress despite increased antioxidant protection.
- Treatment
- 50 μ m Cde0
- Outcome
- oxidative stresse0
- Qualifier
- increasing production of ROS despite increased antioxidant protectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supply of 50 μ m Cd induces oxidative stress by increasing production of ROS despite increased antioxidant protection in maize plants”
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