Abstract
Effects of high concentration manganese on active oxygen production and antioxidant enzymes in cucumber leaves under natural irradiation and 1/2 natural irradiation were studied. High concentration manganese increased the H2O2 content and O2*- producing rate of cucumber leaves (Fig.1A, B) and caused lipid peroxidation (Fig.1C). Compare to natural irradiation, 1/2 natural irradiation significantly decreased active oxygen production and lipid peroxidation (Fig.1). CAT activities in cytosols and chloroplasts were inhibited by high concentration manganese (Fig.2B), and other antioxidant enzyme activities were enhanced by high concentration manganese (Fig.2A, C-F). Especially activities of APX, DHAR and GR in chloroplasts were greatly stimulated by high concentration manganese under natural irradiation compared to 1/2 irradiation, which may play important roles in scavenging active oxygen species. Antioxidant enzymes in mitochondria showed higher activities under high concentration manganese under natural irradiation, but the differences were not significant under 1/2 natural irradiation (Fig.2A, C-F).
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Claims 8
Claim · model-written summary
High manganese increased cucumber leaf H2O2 content and O2*- production rate.
- Taxon
- cucumber
Cucumis sativuse0 - Organ / stage
- leavese0
- Treatment
- High concentration manganesee0
- Outcome
- H2O2 content and O2*- producing ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High concentration manganese increased the H2O2 content and O2*- producing rate of cucumber leaves (Fig.1A, B)”
Claim · model-written summary
High manganese caused lipid peroxidation in cucumber leaves.
- Taxon
- cucumberCucumis sativuse0
- Organ / stage
- leavese0
- Treatment
- High concentration manganesee0
- Outcome
- lipid peroxidatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High concentration manganese increased the H2O2 content and O2*- producing rate of cucumber leaves (Fig.1A, B) and caused lipid peroxidation”
Claim · model-written summary
Half natural irradiation significantly decreased active oxygen production and lipid peroxidation versus natural irradiation.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 1/2 natural irradiatione0
- Outcome
- active oxygen production and lipid peroxidatione0
- Direction
- decreasede0
- Comparator
- natural irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compare to natural irradiation, 1/2 natural irradiation significantly decreased active oxygen production and lipid peroxidation (Fig.1).”
t0“cucumber leaves”
Claim · model-written summary
High manganese inhibited cytosolic and chloroplast CAT activity.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- cytosols and chloroplastse0
- Treatment
- high concentration manganesee0
- Gene
- CATe0
- Outcome
- CAT activitiese0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CAT activities in cytosols and chloroplasts were inhibited by high concentration manganese (Fig.2B)”
t0“cucumber leaves”
Claim · model-written summary
High manganese enhanced other antioxidant enzyme activities.
- Taxon
- cucumberCucumis sativust0
- Treatment
- high concentration manganesee0
- Outcome
- other antioxidant enzyme activitiese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“other antioxidant enzyme activities were enhanced by high concentration manganese”
t0“cucumber leaves”
Claim · model-written summary
High manganese greatly stimulated chloroplast APX, DHAR and GR under natural versus half irradiation.
- Taxon
- cucumberCucumis sativust0
- Organ / stage
- chloroplastse0
- Treatment
- high concentration manganese under natural irradiatione0
- Outcome
- activities of APX, DHAR and GRe0
- Direction
- greatly stimulatede0
- Comparator
- 1/2 irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of APX, DHAR and GR in chloroplasts were greatly stimulated by high concentration manganese under natural irradiation compared to 1/2 irradiation”
t0“cucumber leaves”
Claim · model-written summary
Mitochondrial antioxidant enzymes had higher activities with high manganese under natural irradiation.
- Taxon
- cucumberCucumis sativust0
- Treatment
- high concentration manganese under natural irradiatione0
- Outcome
- Antioxidant enzymes in mitochondriae0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidant enzymes in mitochondria showed higher activities under high concentration manganese under natural irradiation”
t0“cucumber leaves”
Claim · model-written summary
Under half natural irradiation, mitochondrial antioxidant enzyme differences were not significant.
- Taxon
- cucumberCucumis sativust0
- Treatment
- 1/2 natural irradiatione0
- Outcome
- differencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the differences were not significant under 1/2 natural irradiation”
t0“cucumber leaves”
The same questions in other papers
manganese atom · physiology: oxidative · Cucumis sativus (cucumber)Positive and negative results
1 in the opposite direction
- positive
manganese atom · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
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1 paper more in this group
See all 5 papers →radiation · physiology: antioxidant enzymes · Cucumis sativus (cucumber)Positive and negative results
1 in the opposite direction
- negative
radiation · physiology: oxidative · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
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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.