Abstract
• Salt stress resulted in reduction of growth, chlorophyll contents. • MT treatment alleviated the oxidative damage of gerbera . • MT regulates ion homeostasis and antioxidant strategy in response to salt stress. • MT pretreatment improves growth and biomass of gerbera under salt stress. Salt stress is a major abiotic stress factor that is increasing at a continuos pace and pressurizing global food security in view of climate change. Therefore, plant scientists are developing strategies to ameliorate the negative effects of salt stress on crop production. Melatonin (N-acetyl-5-methoxytryptamine; MT) is a vital biological hormone in plants that modulates growth, development, and tolerance to extreme environmental conditions. Its exogenous application is used to improve resistance to various stressors. Gerbera ( Gerbera jamosonii L. cv. Yunnanhong) is a vital ornamental flower crop moderately sensitive against salt stress. A series of experiments were conducted on gerbera plants grown under NaCl stress (150 mM) with or in the absence of MT at 0.1 and 0.2 mM. It was shown that salt stress reduced growth and physiological traits but also caused oxidative stress, as recorded by the induction of oxidative stress markers in cell tissues. Foliar application of MT, especially at the concentration of 0.2 mM, boosted plant growth, biomass production, photosynthetic pigments, and ameliorated oxidative stress. The decrease in oxidative stress was associated with improved antioxidant activity linked to the production of the enzymes catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD). Exogenous MT also improved potassium (K + ) uptake and restricted sodium (Na + ) uptake in the leaves of gerbera. In conclusion, optimal MT application may serve as a potential ameliorator of salt-induced oxidative stress and help in the regulation of salinity for gerbera production under the threat of climate change.
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Claims 8
Claim · model-written summary
Salt stress reduced growth and physiological traits in gerbera.
GerberaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress reduced growth and physiological traits but also caused oxidative stress, as recorded by the induction of oxidative stress markers in cell tissues”
t0“Gerbera jamosonii”
Claim · model-written summary
Salt stress induced oxidative stress markers in gerbera tissues.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress reduced growth and physiological traits but also caused oxidative stress, as recorded by the induction of oxidative stress markers in cell tissues”
t0“Gerbera jamosonii”
Claim · model-written summary
Foliar MT at especially 0.2 mM boosted gerbera plant growth, biomass production.
- Treatment
- Foliar application of MTe0
- Outcome
- plant growth, biomass productione0
- Direction
- boostede0
- Qualifier
- especially at the concentration of 0.2 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of MT, especially at the concentration of 0.2 mM, boosted plant growth, biomass production, photosynthetic pigments, and ameliorated oxidative stress.”
t0“Gerbera jamosonii”
Claim · model-written summary
Foliar MT at especially 0.2 mM boosted gerbera photosynthetic pigments.
- Treatment
- Foliar application of MTe0
- Outcome
- photosynthetic pigmentse0
- Direction
- boostede0
- Qualifier
- especially at the concentration of 0.2 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of MT, especially at the concentration of 0.2 mM, boosted plant growth, biomass production, photosynthetic pigments, and ameliorated oxidative stress.”
t0“Gerbera jamosonii”
Claim · model-written summary
Foliar MT at especially 0.2 mM ameliorated gerbera oxidative stress.
- Treatment
- Foliar application of MTe0
- Outcome
- oxidative stresse0
- Direction
- amelioratede0
- Qualifier
- especially at the concentration of 0.2 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of MT, especially at the concentration of 0.2 mM, boosted plant growth, biomass production, photosynthetic pigments, and ameliorated oxidative stress.”
t0“Gerbera jamosonii”
Claim · model-written summary
Reduced oxidative stress was associated with improved antioxidant activity in gerbera.
- Gene
- catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD)e0
- Outcome
- oxidative stresse0
- Direction
- decreasee0
- Qualifier
- improved antioxidant activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in oxidative stress was associated with improved antioxidant activity linked to the production of the enzymes catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD).”
t0“Gerbera jamosonii”
Claim · model-written summary
Exogenous MT improved gerbera leaf potassium (K + ) uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous MT also improved potassium (K + ) uptake and restricted sodium (Na + ) uptake in the leaves of gerbera.”
Claim · model-written summary
Exogenous MT restricted gerbera leaf sodium (Na + ) uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous MT also improved potassium (K + ) uptake and restricted sodium (Na + ) uptake in the leaves of gerbera.”
The same questions in other papers
application · physiology: photosynthesis · GerberaResults agree
1 paper in the same direction as this paper
- positive
application · physiology: oxidative · GerberaResults agree
1 paper in the same direction as this paper
- positive
salinity · growth · GerberaResults agree
1 paper in the same direction as this paper
- negative
salinity · physiology: oxidative · GerberaResults agree
2 papers in the same direction as this paper
- negative
- negative
application · yield · GerberaResults agree
7 papers in the same direction as this paper
- positive
- positive
- positive
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See all 8 papers →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.