Abstract
Drought and salt stress are important limiting factors that affect crop growth and yield. As a newly recognized plant hormone, melatonin can participate in the regulation of plant stress tolerance and enhance the tolerance of plants to adversity. In this study, the effects of melatonin (150 µmol·L−1) on agronomic traits, osmotic adjustment substances, antioxidant enzyme activities, and reactive oxygen species content in C. esculentus under different salt (0 and 200 mmol·L−1 NaCl), drought (70% field capacity, 50% field capacity), and salt–drought (200 mmol·L−1 NaCl + 50% field capacity) stress conditions were determined using a pot experiment. Spraying with 150 µmol·L−1 of melatonin effectively improved the plant height, number of blades, biomass, and root growth of C. esculentus seedlings under salt, drought, and combined stress. In addition, this treatment also increased the relative water content, superoxide dismutase, peroxidase, and catalase activities, and soluble sugar content of the blades and decreased the relative electroconductivity conductivity and proline, malondialdehyde, hydrogen peroxide, and superoxide anion contents. A comprehensive analysis showed that spraying the plants with exogenous melatonin could increase the activity of antioxidant enzymes and the accumulation of osmotic adjustment substances in C. esculentus blades under salt and drought stress, effectively remove excessive reactive oxygen species, alleviate oxidative damage, and enhance the ability of C. esculentus to resist salt and drought stress.
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Claims 6
Claim · model-written summary
Spraying 150 µmol/L melatonin improved plant height, number of blades and biomass of C. esculentus seedlings under salt, drought and combined stress.
- Taxon
- Cyperus esculentus L.
Cyperus esculentust0 - Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- plant height, number of blades, biomasse1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“improved the plant height, number of blades, biomass”
t0“Cyperus esculentus L.”
Claim · model-written summary
Spraying 150 µmol/L melatonin improved root growth of C. esculentus seedlings under salt, drought and combined stress.
- Taxon
- Cyperus esculentus L.Cyperus esculentust0
- Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- root growthe1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“improved the plant height, number of blades, biomass, and root growth”
t0“Cyperus esculentus L.”
Claim · model-written summary
The melatonin treatment increased relative water content and soluble sugar content of C. esculentus blades under stress.
- Taxon
- Cyperus esculentus L.Cyperus esculentust0
- Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- relative water content, superoxide dismutase, peroxidase, and catalase activities, and soluble sugar contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“increased the relative water content, superoxide dismutase, peroxidase, and catalase activities, and soluble sugar content of the blades”
t0“Cyperus esculentus L.”
Claim · model-written summary
The melatonin treatment decreased relative electroconductivity and proline content in C. esculentus under stress.
- Taxon
- Cyperus esculentus L.Cyperus esculentust0
- Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- relative electroconductivity conductivity and prolinee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“decreased the relative electroconductivity conductivity and proline”
t0“Cyperus esculentus L.”
Claim · model-written summary
The melatonin treatment decreased malondialdehyde, hydrogen peroxide and superoxide anion contents in C. esculentus under stress.
- Taxon
- Cyperus esculentus L.Cyperus esculentust0
- Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- malondialdehyde, hydrogen peroxide, and superoxide anion contentse1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“decreased the relative electroconductivity conductivity and proline, malondialdehyde, hydrogen peroxide, and superoxide anion contents”
t0“Cyperus esculentus L.”
Claim · model-written summary
The authors conclude that exogenous melatonin enhanced the ability of C. esculentus to resist salt and drought stress.
- Taxon
- Cyperus esculentus L.Cyperus esculentust0
- Treatment
- Spraying with 150 µmol·L−1 of melatonine0
- Outcome
- ability of C. esculentus to resist salt and drought stresse1
- Direction
- enhancee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying with 150 µmol·L−1 of melatonin”
e1“enhance the ability of C. esculentus to resist salt and drought stress”
t0“Cyperus esculentus L.”
The same questions in other papers
application · growth · Cyperus esculentusPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
application · physiology: osmolytes · Cyperus esculentusResults agree
1 paper in the same direction as this paper
- positive
application · physiology: oxidative · Cyperus esculentusResults agree
1 paper in the same direction as this paper
- positive
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.