Abstract
ABSTRACT Saline‐alkali (SA) stress is one of the most widespread abiotic stresses affecting plant growth and productivity worldwide. Melatonin is an auxin‐like analogue that can improve plant tolerance to multiple abiotic stresses. Herein, two soybean cultivars, Heihe 49 and Henong 95 were pot cultured and treated with 80 mM SA stress solution (mixed with NaCl:Na 2 CO 3 :NaHCO 3 :Na 2 SO 4 = 1:1:9:9) at the V1 stage. The 0–300 μM melatonin was foliar sprayed at the V3 stage to explore the effects of exogenous melatonin treatments on soybean plant growth at the grain‐filling stage under SA stress. Compared with the control, SA stress significantly reduced the growth, biomass accumulation and yield of both soybean cultivars. As expected, melatonin treatments significantly increased the plant height, stem diameter, shoot dry weight and pod number of soybean plants under SA stress. In addition, MT treatments significantly increased the chlorophyll content, gas exchange and chlorophyll fluorescence parameters of soybean leaves under SA stress, which were conducive to the accumulation of soluble sugars, sucrose, fructose and starch in the leaves, pod skins and grains. MT treatments promote the carbohydrate metabolic cycle by increasing the activity of sucrose and starch‐metabolizing enzymes and upregulating the expression levels of correlative genes in the leaves, pod skins, and grains of both soybean cultivars. MT treatments upregulated the expression levels of GmSWEETs and GmSUC2 in soybean tissues to increase the transportation of sucrose into grains, promote grain development, and finally increase soybean yield under SA stress.
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Claims 8
Claim · model-written summary
SA stress significantly reduced growth, biomass and yield in both soybean cultivars.
- Taxon
- soybean
Glycine maxe0 - Treatment
- SA stresse0
- Outcome
- growth, biomass accumulation and yielde0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control, SA stress significantly reduced the growth, biomass accumulation and yield of both soybean cultivars.”
Claim · model-written summary
Melatonin significantly increased plant height, stem diameter, shoot dry weight and pod number under SA stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- melatonin treatmentse0
- Outcome
- plant height, stem diameter, shoot dry weight and pod numbere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“melatonin treatments significantly increased the plant height, stem diameter, shoot dry weight and pod number of soybean plants under SA stress.”
Claim · model-written summary
Melatonin significantly increased chlorophyll content, gas exchange and fluorescence parameters.
- Taxon
- soybeanGlycine maxe0
- Treatment
- MT treatmentse0
- Outcome
- chlorophyll content, gas exchange and chlorophyll fluorescence parameterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT treatments significantly increased the chlorophyll content, gas exchange and chlorophyll fluorescence parameters of soybean leaves under SA stress”
Claim · model-written summary
Melatonin promoted carbohydrate accumulation in leaves, pod skins and grains.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Melatonint0
- Outcome
- accumulation of soluble sugars, sucrose, fructose and starche0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which were conducive to the accumulation of soluble sugars, sucrose, fructose and starch in the leaves, pod skins and grains.”
t0“Melatonin Increased Soybean Yield”
Claim · model-written summary
Melatonin increased sucrose and starch-metabolizing enzyme activity.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- MT treatmentse0
- Outcome
- activity of sucrose and starch‐metabolizing enzymese0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT treatments promote the carbohydrate metabolic cycle by increasing the activity of sucrose and starch‐metabolizing enzymes”
t0“Soybean Yield”
Claim · model-written summary
Melatonin upregulated related gene expression in leaves, pod skins and grains.
- Taxon
- soybeanGlycine maxe0
- Treatment
- MT treatmentse1
- Outcome
- expression levels of correlative genese0
- Direction
- upregulatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“upregulating the expression levels of correlative genes in the leaves, pod skins, and grains of both soybean cultivars.”
e1“MT treatments promote the carbohydrate metabolic cycle”
Claim · model-written summary
Melatonin upregulated GmSWEETs and GmSUC2 expression and increased sucrose transport into grains.
- Taxon
- soybeanGlycine maxe0
- Treatment
- MT treatmentse0
- Gene
- GmSWEETs and GmSUC2e0
- Outcome
- transportation of sucrose into grainse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT treatments upregulated the expression levels of GmSWEETs and GmSUC2 in soybean tissues to increase the transportation of sucrose into grains”
Claim · model-written summary
Melatonin promoted grain development and increased soybean yield under SA stress.
- Taxon
- soybeanGlycine maxe0
- Treatment
- MT treatmentse1
- Outcome
- soybean yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promote grain development, and finally increase soybean yield under SA stress.”
e1“MT treatments upregulated the expression levels of GmSWEETs”
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See all 13 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.