Abstract
Coronatine [COR] is a novel type of plant growth regulator with similarities in structure and property to jasmonate. The objective of this study was to examine the relationship between increased root vitality induced by 10 nM COR and reactive oxygen species scavenging under potassium (K)-replete (2.5 mM) and K-deficient (0.05 mM) conditions in hydroponic cultured cotton seedlings. K-replete and K-deficient conditions increased root vitality by 2.7- and 3.5-fold, respectively. COR treatment significantly decreased lipid peroxidation in cotton seedlings determined by reduction in MDA levels. These results suggest that COR improves the functioning of both enzymatic and non-enzymatic antioxidant systems. Under K-replete and K-deficient conditions, COR significantly increased the activities of antioxidant enzymes SOD (only for K-repletion), CAT, GPX, and APX comparing; COR also significantly increased DPPH-radical scavenging activity. However, COR led to 1.6- and 1.7-fold increases in superoxide anion (O2•-) concentrations, and 5.7- and 2.1-fold increases in hydrogen peroxide (H2O2) levels, respectively. Additionally, COR intensified the DAB staining of H2O2 and the NBT staining of O2•-. Therefore, our results reveal that COR-induced ROS accumulation stimulates the activities of most antioxidant enzymes but does not induce oxidative stress in cotton roots.
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Claims 10
Claim · model-written summary
Coronatine increased root vitality of cotton seedlings under K-replete and K-deficient conditions, by 2.7- and 3.5-fold.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- 10 nM CORe1
- Outcome
- root vitalitye1
- Direction
- increasede1
- Value
- 2.7- and 3.5-folde2
- Qualifier
- K-replete and K-deficient conditionse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“increased root vitality induced by 10 nM COR”
e2“K-replete and K-deficient conditions increased root vitality by 2.7- and 3.5-fold, respectively”
Claim · model-written summary
Coronatine significantly decreased lipid peroxidation in cotton seedlings.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- lipid peroxidatione1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“COR treatment significantly decreased lipid peroxidation in cotton seedlings determined by reduction in MDA levels”
Claim · model-written summary
Coronatine significantly increased SOD activity under K-replete conditions only.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- activities of antioxidant enzymes SODe1
- Direction
- increasede1
- Qualifier
- only for K-repletione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“COR significantly increased the activities of antioxidant enzymes SOD (only for K-repletion), CAT, GPX, and APX comparing”
Claim · model-written summary
Coronatine significantly increased CAT, GPX and APX activities under K-replete and K-deficient conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- CAT, GPX, and APXe1
- Direction
- increasede1
- Qualifier
- Under K-replete and K-deficient conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“Under K-replete and K-deficient conditions, COR significantly increased the activities of antioxidant enzymes SOD (only for K-repletion), CAT, GPX, and APX comparing”
Claim · model-written summary
Coronatine significantly increased DPPH-radical scavenging activity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- DPPH-radical scavenging activitye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“COR also significantly increased DPPH-radical scavenging activity”
Claim · model-written summary
Coronatine increased superoxide anion concentrations by 1.6- and 1.7-fold.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- superoxide anion (O2•-) concentrationse1
- Direction
- increasese1
- Value
- 1.6- and 1.7-folde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“However, COR led to 1.6- and 1.7-fold increases in superoxide anion (O2•-) concentrations”
Claim · model-written summary
Coronatine increased hydrogen peroxide levels by 5.7- and 2.1-fold.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- hydrogen peroxide (H2O2) levelse1
- Direction
- increasese1
- Value
- 5.7- and 2.1-folde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“However, COR led to 1.6- and 1.7-fold increases in superoxide anion (O2•-) concentrations, and 5.7- and 2.1-fold increases in hydrogen peroxide (H2O2) levels”
Claim · model-written summary
Coronatine intensified DAB and NBT staining of H2O2 and O2•-.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- DAB staining of H2O2 and the NBT staining of O2•-e1
- Direction
- intensifiede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“Additionally, COR intensified the DAB staining of H2O2 and the NBT staining of O2•-”
Claim · model-written summary
Coronatine-induced ROS accumulation did not cause oxidative stress in cotton roots.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- oxidative stresse1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“COR-induced ROS accumulation stimulates the activities of most antioxidant enzymes but does not induce oxidative stress in cotton roots”
Claim · model-written summary
Coronatine stimulated the activities of most antioxidant enzymes in cotton roots.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- CORe1
- Outcome
- activities of most antioxidant enzymese1
- Direction
- stimulatese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Roots”
e1“COR-induced ROS accumulation stimulates the activities of most antioxidant enzymes but does not induce oxidative stress in cotton roots”