Abstract
Soil pollution by toxic metals is a serious problem for the environment and is also one of the environmental stresses for higher plants. Zinc as a heavy metal plays an important role in many biochemical functions of plants. However, excess amount of zinc is one of the most important growth limiting factors in acid soils. In this investigation five day seedlings of Zea mays L. for 12 days, under hydroponic conditions were treated with concentrations of 0, 400 and 600 of zinc sulfate also malic acid and citric acid 0.32 mM together with zinc concentrations. Then, plants were harvested and dry weight, root and shoot length, Malondialdehyde (MDA), H2O2 content and antioxidant enzyme activity (CAT, APX, GR and GPX) was measured. The results showed that by increasing Zn concentration from 400 to 600 µM, root and shoot dry weight and length were decreased, while MDA, H2O2 content, antioxidant enzyme activity were increased. Also, the present of citric and malic acids decreased toxicity effects. Generally, it was concluded that zinc at high concentration induced toxicity effects in Zea mays L. but presece of malic and citric acid decreased toxicity effects in this plant.
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Claims 5
Claim · model-written summary
Increasing zinc from 400 to 600 µM decreased maize root and shoot dry weight and length.
- Treatment
- Zn concentration from 400 to 600 µMe0
- Outcome
- root and shoot dry weight and lengthe0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing Zn concentration from 400 to 600 µM, root and shoot dry weight and length were decreased”
e1“seedlings of Zea mays L.”
Claim · model-written summary
Increasing zinc raised maize MDA and H2O2 content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing Zn concentration from 400 to 600 µM, root and shoot dry weight and length were decreased, while MDA, H2O2 content, antioxidant enzyme activity were increased.”
e1“seedlings of Zea mays L.”
Claim · model-written summary
Increasing zinc raised maize antioxidant enzyme activity.
- Treatment
- Zn concentration from 400 to 600 µMe0
- Outcome
- antioxidant enzyme activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing Zn concentration from 400 to 600 µM, root and shoot dry weight and length were decreased, while MDA, H2O2 content, antioxidant enzyme activity were increased.”
e1“seedlings of Zea mays L.”
Claim · model-written summary
Citric acid decreased zinc toxicity in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the present of citric and malic acids decreased toxicity effects.”
e1“toxicity effects in Zea mays L.”
Claim · model-written summary
Malic acid decreased zinc toxicity in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the present of citric and malic acids decreased toxicity effects.”
e1“toxicity effects in Zea mays L.”
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