Abstract
Low temperatures have seriously affected crop growth owing to climate change and frequent extreme weather. Low-temperature disasters easily affect the early-growth stages of planted soybeans in Northeast China. In the present study, the comprehensive evaluation method using low-temperature (4 °C) simulation at soybean germination and seedling stages was used to compare soybean cultivars. The results revealed that low temperatures inhibited the germination ability of soybean seeds and prolonged the average germination time (about 7–13 days under low temperatures). Simultaneously, low-temperature stress at the seedling stage decreased plant height and dry weight, but accumulated proline and soluble sugar. The soluble protein content of most cultivars decreased at low temperatures. Peroxidase activity was significantly decreased in henong70, suinong82, and heinong83, and opposite in the other cultivars. Additionally, MDA content increased in cultivars heinong69, dongnong42, and dongnong55. The final comprehensive evaluation showed that Suinong42 had better low-temperature tolerance, whereas Kendou40 was more sensitive to low temperatures. The grey correlation analysis also showed that dry weight and proline can be used as the target traits for cultivar improvement.
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Claims 11
Claim · model-written summary
Low temperatures inhibited soybean germination ability.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- seedse0
- Treatment
- low temperaturese0
- Outcome
- germination abilitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low temperatures inhibited the germination ability of soybean seeds and prolonged the average germination time (about 7–13 days under low temperatures)”
Claim · model-written summary
Low temperatures prolonged average germination time to about 7–13 days.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- seedse0
- Treatment
- low temperaturese0
- Outcome
- average germination timee0
- Direction
- prolongede0
- Value
- 7–13 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low temperatures inhibited the germination ability of soybean seeds and prolonged the average germination time (about 7–13 days under low temperatures)”
Claim · model-written summary
Low-temperature seedling stress decreased plant height and dry weight.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- seedling stagee0
- Treatment
- low-temperature stresse0
- Outcome
- plant height and dry weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low-temperature stress at the seedling stage decreased plant height and dry weight, but accumulated proline and soluble sugar”
t0“Soybean Cultivars”
Claim · model-written summary
Low-temperature seedling stress accumulated proline and soluble sugar.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- seedling stagee0
- Treatment
- low-temperature stresse0
- Outcome
- proline and soluble sugare0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low-temperature stress at the seedling stage decreased plant height and dry weight, but accumulated proline and soluble sugar”
t0“Soybean Cultivars”
Claim · model-written summary
Soluble protein content decreased in most cultivars at low temperatures.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- low temperaturese0
- Outcome
- soluble protein contente0
- Direction
- decreasede0
- Qualifier
- most cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soluble protein content of most cultivars decreased at low temperatures”
t0“Soybean Cultivars”
Claim · model-written summary
Peroxidase activity significantly decreased in henong70, suinong82 and heinong83.
- Taxon
- SoybeanGlycine maxt0
- Material
- henong70, suinong82, and heinong83e0
- Outcome
- Peroxidase activitye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peroxidase activity was significantly decreased in henong70, suinong82, and heinong83, and opposite in the other cultivars”
t0“Soybean Cultivars”
Claim · model-written summary
Peroxidase activity increased in the other cultivars.
- Taxon
- SoybeanGlycine maxt0
- Material
- other cultivarse0
- Outcome
- Peroxidase activitye0
- Direction
- oppositee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peroxidase activity was significantly decreased in henong70, suinong82, and heinong83, and opposite in the other cultivars”
t0“Soybean Cultivars”
Claim · model-written summary
MDA content increased in heinong69, dongnong42 and dongnong55.
- Taxon
- SoybeanGlycine maxt0
- Material
- heinong69, dongnong42, and dongnong55e0
- Outcome
- MDA contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MDA content increased in cultivars heinong69, dongnong42, and dongnong55”
t0“Soybean Cultivars”
Claim · model-written summary
Suinong42 had better low-temperature tolerance.
- Taxon
- SoybeanGlycine maxt0
- Material
- Suinong42e0
- Outcome
- low-temperature tolerancee0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suinong42 had better low-temperature tolerance, whereas Kendou40 was more sensitive to low temperatures”
t0“Soybean Cultivars”
Claim · model-written summary
Kendou40 was more sensitive to low temperatures.
- Taxon
- SoybeanGlycine maxt0
- Material
- Kendou40e0
- Outcome
- sensitive to low temperaturese0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suinong42 had better low-temperature tolerance, whereas Kendou40 was more sensitive to low temperatures”
t0“Soybean Cultivars”
Claim · model-written summary
Dry weight and proline are proposed as targets for cultivar improvement.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- dry weight and prolinee0
- Qualifier
- target traits for cultivar improvemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry weight and proline can be used as the target traits for cultivar improvement”
t0“Soybean Cultivars”
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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.