Abstract
Soil salinization is a common abiotic stress that seriously affects soybean growth and yield, underscoring the need to enhance plant salt tolerance for sustainable agriculture development. Selenium is a beneficial element that has been shown to promote plant growth, development and stress resistance. This study employed pot experiments to investigate the effects of different salt levels (0, 50, 100 and 150 mM NaCl) on salt-tolerant (Zhonghuang 13) and salt-sensitive soybean (Dongnong 63) varieties. Additionally, the critical salt concentration (100 mM NaCl) was selected to explore the effects of exogenous selenium (0, 0.5, 1 and 3 mg·kg−1) on improving salt tolerance in salt-tolerant and salt-sensitive soybeans under salt stress. Results showed that as salt concentration increased, plant height, shoot and root fresh weight, SPAD value and enzyme activity of both salt-tolerant and salt-sensitive soybeans significantly decreased. The increasing concentration of exogenous selenium significantly decreased the proline content of salt-sensitive and salt-tolerant soybeans by 40.65–58.87% and 38.51–50.46%, respectively, and the MDA content by 19.33–30.36% and 16.94–37.48%, respectively. Selenium supplementation also reduced the content of Na+ in salt-sensitive and salt-tolerant soybeans and improved K+ absorption in soybeans, which increased the K+/Na+ ratio. Moreover, high-throughput sequencing of the 16S ribosomal RNA gene demonstrated that selenium application optimized the rhizosphere microecology structure of salt-tolerant and salt-sensitive soybean varieties and enhanced functional genes related to lipid metabolism, energy metabolism and cell motility of rhizosphere microorganisms. In summary, selenium application improved the salt tolerance of the two soybean varieties by enhancing the physiological resistance to salt stress and optimizing the structure and function of the rhizosphere microbial community.
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Claims 11
Claim · model-written summary
As salt concentration increased, plant height, shoot and root fresh weight significantly decreased in soybean.
- Taxon
- soybean
Glycine maxt0 - Treatment
- salt concentratione1
- Outcome
- plant height, shoot and root fresh weighte1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e1“as salt concentration increased, plant height, shoot and root fresh weight, SPAD value and enzyme activity of both salt-tolerant and salt-sensitive soybeans significantly decreased”
Claim · model-written summary
As salt concentration increased, SPAD value and enzyme activity significantly decreased in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- salt concentratione1
- Outcome
- SPAD value and enzyme activitye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e1“as salt concentration increased, plant height, shoot and root fresh weight, SPAD value and enzyme activity of both salt-tolerant and salt-sensitive soybeans significantly decreased”
Claim · model-written summary
Exogenous selenium significantly decreased proline content in salt-sensitive soybean by 40.65–58.87%.
- Taxon
- soybeanGlycine maxt0
- Material
- salt-sensitivee2
- Treatment
- exogenous seleniume2
- Outcome
- proline contente2
- Direction
- decreasede2
- Value
- 40.65–58.87%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e2“The increasing concentration of exogenous selenium significantly decreased the proline content of salt-sensitive and salt-tolerant soybeans by 40.65–58.87% and 38.51–50.46%, respectively, and the MDA content by 19.33–30.36% and 16.94–37.48%, respectively”
Claim · model-written summary
Exogenous selenium significantly decreased proline content in salt-tolerant soybean by 38.51–50.46%.
- Taxon
- soybeanGlycine maxt0
- Material
- salt-tolerante2
- Treatment
- exogenous seleniume2
- Outcome
- proline contente2
- Direction
- decreasede2
- Value
- 38.51–50.46%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e2“The increasing concentration of exogenous selenium significantly decreased the proline content of salt-sensitive and salt-tolerant soybeans by 40.65–58.87% and 38.51–50.46%, respectively, and the MDA content by 19.33–30.36% and 16.94–37.48%, respectively”
Claim · model-written summary
Exogenous selenium significantly decreased MDA content in salt-sensitive soybean by 19.33–30.36%.
- Taxon
- soybeanGlycine maxt0
- Material
- salt-sensitivee2
- Treatment
- exogenous seleniume2
- Outcome
- MDA contente2
- Direction
- decreasede2
- Value
- 19.33–30.36%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e2“The increasing concentration of exogenous selenium significantly decreased the proline content of salt-sensitive and salt-tolerant soybeans by 40.65–58.87% and 38.51–50.46%, respectively, and the MDA content by 19.33–30.36% and 16.94–37.48%, respectively”
Claim · model-written summary
Exogenous selenium significantly decreased MDA content in salt-tolerant soybean by 16.94–37.48%.
- Taxon
- soybeanGlycine maxt0
- Material
- salt-tolerante2
- Treatment
- exogenous seleniume2
- Outcome
- MDA contente2
- Direction
- decreasede2
- Value
- 16.94–37.48%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e2“The increasing concentration of exogenous selenium significantly decreased the proline content of salt-sensitive and salt-tolerant soybeans by 40.65–58.87% and 38.51–50.46%, respectively, and the MDA content by 19.33–30.36% and 16.94–37.48%, respectively”
Claim · model-written summary
Selenium supplementation reduced the Na+ content of salt-sensitive and salt-tolerant soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Selenium supplementatione3
- Outcome
- content of Na+e3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e3“Selenium supplementation also reduced the content of Na+ in salt-sensitive and salt-tolerant soybeans and improved K+ absorption in soybeans, which increased the K+/Na+ ratio”
Claim · model-written summary
Selenium supplementation improved K+ absorption in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Selenium supplementatione3
- Outcome
- K+ absorptione3
- Direction
- improvede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e3“Selenium supplementation also reduced the content of Na+ in salt-sensitive and salt-tolerant soybeans and improved K+ absorption in soybeans, which increased the K+/Na+ ratio”
Claim · model-written summary
Selenium supplementation increased the K+/Na+ ratio in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Selenium supplementatione3
- Outcome
- K+/Na+ ratioe3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e3“Selenium supplementation also reduced the content of Na+ in salt-sensitive and salt-tolerant soybeans and improved K+ absorption in soybeans, which increased the K+/Na+ ratio”
Claim · model-written summary
Selenium application optimized the rhizosphere microbial community structure of both soybean varieties.
- Taxon
- soybeanGlycine maxt0
- Treatment
- selenium applicatione4
- Interactor
- rhizosphere microorganismse5symbiont
- Outcome
- rhizosphere microecology structuree4
- Direction
- optimizede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e4“selenium application optimized the rhizosphere microecology structure of salt-tolerant and salt-sensitive soybean varieties”
e5“enhanced functional genes related to lipid metabolism, energy metabolism and cell motility of rhizosphere microorganisms”
Claim · model-written summary
Selenium application enhanced functional genes related to lipid metabolism, energy metabolism and cell motility of rhizosphere microorganisms.
- Taxon
- soybeanGlycine maxt0
- Treatment
- selenium applicatione4
- Interactor
- rhizosphere microorganismse5symbiont
- Outcome
- functional genes related to lipid metabolism, energy metabolism and cell motilitye5
- Direction
- enhancede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Salt-Tolerant and Salt-Sensitive Soybeans”
e4“selenium application optimized the rhizosphere microecology structure of salt-tolerant and salt-sensitive soybean varieties”
e5“enhanced functional genes related to lipid metabolism, energy metabolism and cell motility of rhizosphere microorganisms”
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