Abstract
The effects of spraying two cytokinins,6-benzylaminopurine (6-BA) and kinetin (KT) ,on the growth,the contents of chlorophyll and proline and cadmium,as well as the activities of antioxidant enzymes such as superoxide dismutase (SOD) ,peroxidase (POD) and catalase (CAT) in the leaves of corn seedlings under cadmium stress were studied by solution culture experiments. The results showed that spraying 6-BA and KT increased the biomass and the contents of chlorophyll,proline and cadmium,while it decreased the content of malondialdehyde (MDA) in corn leaves. The treatments also promoted the increase of the enzyme activities of CAT and POD,while they did not significantly influence the activities of SOD in corn leaves. The results suggest that exogenous cytokinins could alleviate the toxicity of cadmium to corn seedlings by keeping the stability of chlorophyll,enhancing the H2 O2 scavenging systems through accumulating more proline,and improving the activities of POD and CAT in plants. The alleviation effects increased with the increase of spraying concentrations from 0 to 20 mg·L-1 for 6-BA,while the optimal alleviation effect was obtained at a concentration of 70 mg·L-1 for KT.
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Claims 7
Claim · model-written summary
6-BA and KT sprays increased biomass, chlorophyll, proline, and cadmium content.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- spraying 6-BA and KTe0
- Outcome
- biomass and the contents of chlorophyll,proline and cadmiume0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying 6-BA and KT increased the biomass and the contents of chlorophyll,proline and cadmium”
t0“corn”
Claim · model-written summary
6-BA and KT sprays decreased leaf malondialdehyde content.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- spraying 6-BA and KTe0
- Outcome
- content of malondialdehyde (MDA)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying 6-BA and KT increased the biomass and the contents of chlorophyll,proline and cadmium,while it decreased the content of malondialdehyde (MDA) in corn leaves”
Claim · model-written summary
Cytokinin treatments increased CAT and POD activity.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- spraying 6-BA and KTe1
- Outcome
- enzyme activities of CAT and PODe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments also promoted the increase of the enzyme activities of CAT and POD”
e1“spraying 6-BA and KT”
t0“corn”
Claim · model-written summary
Cytokinin treatments did not significantly influence SOD activity.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- spraying 6-BA and KTe1
- Outcome
- activities of SODe0
- Direction
- did not significantly influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments also promoted the increase of the enzyme activities of CAT and POD,while they did not significantly influence the activities of SOD in corn leaves”
e1“spraying 6-BA and KT”
Claim · model-written summary
Cadmium toxicity alleviation increased with 6-BA spray concentration from 0 to 20 mg·L-1.
- Taxon
- corn seedlingsZea mays subsp. mayst1
- Treatment
- spraying concentrations from 0 to 20 mg·L-1 for 6-BAe0
- Outcome
- alleviation effectse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The alleviation effects increased with the increase of spraying concentrations from 0 to 20 mg·L-1 for 6-BA”
t1“corn seedlings”
Claim · model-written summary
KT gave optimal cadmium stress alleviation at 70 mg·L-1.
- Taxon
- corn seedlingsZea mays subsp. mayst1
- Treatment
- 70 mg·L-1 for KTe0
- Outcome
- alleviation effecte0
- Direction
- optimale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the optimal alleviation effect was obtained at a concentration of 70 mg·L-1 for KT”
t1“corn seedlings”
Claim · model-written summary
The authors suggested cytokinins alleviate cadmium toxicity through chlorophyll stability, proline accumulation, and POD and CAT activity.
- Taxon
- corn seedlingsZea mays subsp. mayse0
- Treatment
- exogenous cytokininse0
- Outcome
- alleviate the toxicity of cadmiume0
- Qualifier
- keeping the stability of chlorophyll,enhancing the H2 O2 scavenging systems through accumulating more proline,and improving the activities of POD and CATe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous cytokinins could alleviate the toxicity of cadmium to corn seedlings by keeping the stability of chlorophyll,enhancing the H2 O2 scavenging systems through accumulating more proline,and improving the activities of POD and CAT in plants”
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