Abstract
Maize (Zea mays L. cv kanaujia) plants grown with Zn [10 (control), 0.1 (low) and 20 microM (high)], were investigated for concentration of antioxidants and activities of antioxidative enzymes in leaves. Young leaves of low Zn plants developed whitish-necrotic spots. Leaves of both low and high Zn plants showed decrease in chlorophyll concentration and accumulation of lipid peroxides, ascorbate and dehydroascorbate, associated with a decrease in the activity of ascorbate peroxidase and superoxide dismutase. Low and high Zn, however, showed diverse effect on glutathione reductase. While low Zn increased the activity of glutathione reductase, high Zn decreased its activity. Zinc effect on antioxidative constituents suggested Zn involvement in sustaining the antioxidative defense system in maize leaves.
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Claims 6
Claim · model-written summary
Low zinc produced whitish necrotic spots on young leaves.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Young leaves of low Zn plants developed whitish-necrotic spots.”
t0“Maize”
Claim · model-written summary
Low and high zinc reduced leaf chlorophyll.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of both low and high Zn plants showed decrease in chlorophyll concentration”
t0“Maize”
Claim · model-written summary
Low and high zinc increased lipid peroxides, ascorbate and dehydroascorbate.
- Treatment
- low and high Zne0
- Outcome
- lipid peroxides, ascorbate and dehydroascorbatee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of both low and high Zn plants showed decrease in chlorophyll concentration and accumulation of lipid peroxides, ascorbate and dehydroascorbate”
t0“Maize”
Claim · model-written summary
Low and high zinc decreased ascorbate peroxidase and superoxide dismutase activities.
- Treatment
- low and high Zne0
- Outcome
- activity of ascorbate peroxidase and superoxide dismutasee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of both low and high Zn plants showed decrease in chlorophyll concentration and accumulation of lipid peroxides, ascorbate and dehydroascorbate, associated with a decrease in the activity of ascorbate peroxidase and superoxide dismutase.”
t0“Maize”
Claim · model-written summary
Low zinc increased glutathione reductase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low Zn increased the activity of glutathione reductase”
t0“Maize”
Claim · model-written summary
High zinc decreased glutathione reductase activity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While low Zn increased the activity of glutathione reductase, high Zn decreased its activity.”
t0“Maize”
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