Abstract
Melatonin (MT) has been reported to regulate certain plant physiological processes and promote tolerance to different environmental stresses such as salinity. Green bean (Phaseolus vulgaris L. cv. Royal Nel) seedlings were exposed to 200 mM NaCl with or without pre-treatment with 150 μM MT. Salt stress led to a lower chlorophyll content, a reduced photosynthetic activity, increased reactive oxygen species (ROS) contents, and decreased photosystem II (PSII) activity. The application of exogenous MT to green bean seedlings under salt stress improved photosynthetic activity and alleviated the oxidative damages by enhancing the activity of antioxidant enzymes. The expression of catalase (CAT1), glutathione reductase (GR), superoxide dismutase (CuZnSOD1), ascorbate peroxidase (APX), Peroxiredoxin Q (PrxQ), and 2-cysteine peroxiredoxin (2-Cys-Prx) encoding genes was significantly increased under salt stress in green bean seedling compared with the untreated control. However, plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone. Our study revealed the protective mechanisms mediated by exogenous MT application in NaCl stress alleviation and our findings could be used in the management of green bean cultivation in salinity-prone soils.
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Claims 14
Claim · model-written summary
Salt stress lowered chlorophyll content and photosynthetic activity in green bean seedlings.
- Taxon
- Phaseolus vulgaris L.
Phaseolus vulgarist0 - Treatment
- Salt stresse0
- Outcome
- chlorophyll content, a reduced photosynthetic activitye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress led to a lower chlorophyll content, a reduced photosynthetic activity, increased reactive oxygen species (ROS) contents, and decreased photosystem II (PSII) activity.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Salt stress increased reactive oxygen species content.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Salt stresse0
- Outcome
- reactive oxygen species (ROS) contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress led to a lower chlorophyll content, a reduced photosynthetic activity, increased reactive oxygen species (ROS) contents, and decreased photosystem II (PSII) activity.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Salt stress decreased photosystem II activity.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- Salt stresse0
- Outcome
- photosystem II (PSII) activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress led to a lower chlorophyll content, a reduced photosynthetic activity, increased reactive oxygen species (ROS) contents, and decreased photosystem II (PSII) activity.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin improved photosynthetic activity of salt stressed green bean seedlings.
Not reportedComparator
Verbatim
e0“The application of exogenous MT to green bean seedlings under salt stress improved photosynthetic activity and alleviated the oxidative damages by enhancing the activity of antioxidant enzymes.”
Claim · model-written summary
Melatonin alleviated oxidative damage under salt stress.
Not reportedComparator
Verbatim
e0“The application of exogenous MT to green bean seedlings under salt stress improved photosynthetic activity and alleviated the oxidative damages by enhancing the activity of antioxidant enzymes.”
Claim · model-written summary
Melatonin enhanced antioxidant enzyme activity under salt stress.
- Taxon
- green beane0
- Treatment
- exogenous MTe0
- Outcome
- activity of antioxidant enzymese0
- Direction
- enhancinge0
Not reportedComparator
Verbatim
e0“The application of exogenous MT to green bean seedlings under salt stress improved photosynthetic activity and alleviated the oxidative damages by enhancing the activity of antioxidant enzymes.”
Claim · model-written summary
Salt stress significantly increased expression of six antioxidant defense genes relative to untreated plants.
Verbatim
e0“The expression of catalase (CAT1), glutathione reductase (GR), superoxide dismutase (CuZnSOD1), ascorbate peroxidase (APX), Peroxiredoxin Q (PrxQ), and 2-cysteine peroxiredoxin (2-Cys-Prx) encoding genes was significantly increased under salt stress in green bean seedling compared with the untreated control.”
Claim · model-written summary
Melatonin plus NaCl raised CuZnSOD transcript levels by 28.8% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- CuZnSODe0
- Outcome
- CuZnSODe0
- Direction
- highere0
- Value
- 28.8e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin plus NaCl raised CAT1 transcript levels by 21.1% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- CAT1e0
- Outcome
- CAT1e0
- Direction
- highere0
- Value
- 21.1e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin plus NaCl raised APX transcript levels by 26.1% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- APXe0
- Outcome
- APXe0
- Direction
- highere0
- Value
- 26.1e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin plus NaCl raised GR transcript levels by 20% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- GRe0
- Outcome
- GRe0
- Direction
- highere0
- Value
- 20e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin plus NaCl raised PrxQ transcript levels by 26.2% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- PrxQe0
- Outcome
- PrxQe0
- Direction
- highere0
- Value
- 26.2e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
Melatonin plus NaCl raised 2-Cys-Prx transcript levels by 22.4% versus NaCl alone.
- Taxon
- Phaseolus vulgaris L.Phaseolus vulgarist0
- Treatment
- exogenous MT and NaCle0
- Gene
- 2-Cys-Prxe0
- Outcome
- 2-Cys-Prxe0
- Direction
- highere0
- Value
- 22.4%e0
- Comparator
- NaCl stress alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with exogenous MT and NaCl had 28.8, 21.1, 26.1, 20, 26.2, and 22.4% higher CuZnSOD, CAT1, APX, GR, PrxQ, and 2-Cys-Prx transcript levels, respectively, compared to NaCl stress alone.”
t0“Phaseolus vulgaris L.”
Claim · model-written summary
The findings were proposed for management of green bean in saline soils.
Verbatim
e0“our findings could be used in the management of green bean cultivation in salinity-prone soils.”
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See all 23 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.