Abstract
Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.). For example, reduced nitrogen (N) uptake due to salt-induced depression of nodule formation severely limits soybean growth and yield. Super-nodulating soybean genotypes were previously identified by their superior N2 fixation and photosynthesis. Here, we have tested our hypothesis that the super-nodulating En-b0-1 genotype is more salinity tolerant than a normal-nodulating genotype. The super-nodulating genotype and its parental normal-nodulating cultivar Enrei were grown in pots and subjected to saline conditions during the pre-flowering and reproductive growth stages. Under saline conditions imposed during pre-flowering, En-b0-1 formed heavier nodules, resulting in greater N uptake, higher photosynthetic activity, and greater biomass production compared with Enrei. Saline treatment increased the concentrations of sodium (Na) and chlorine (Cl) in all plant parts regardless of genotype; but in En-b0-1, the concentrations of these elements in shoots were significantly lower, while those in roots and nodules were higher than in Enrei. When the salinity treatment was imposed during the reproductive growth stages, En-b0-1 maintained higher N uptake, leading to better alleviation of salinity-induced yield reduction than in Enrei. The super-nodulating genotype En-b0-1 was more tolerant to salinity than its parental normal-nodulating cultivar, due to its superior nodulation and prevention of excessive accumulation of Na and Cl in shoots, which were retained in roots and nodules, thus supporting our hypothesis.
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Claims 11
Claim · model-written summary
Under saline conditions before flowering, En-b0-1 formed heavier nodules than Enrei.
- Taxon
- soybean
Glycine maxe0 - Material
- En-b0-1e1
- Organ / stage
- pre-floweringe1
- Treatment
- saline conditionse1
- Outcome
- nodulese1
- Direction
- heaviere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“Under saline conditions imposed during pre-flowering, En-b0-1 formed heavier nodules, resulting in greater N uptake, higher photosynthetic activity, and greater biomass production compared with Enrei”
Claim · model-written summary
Under saline conditions before flowering, En-b0-1 had greater N uptake than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- pre-floweringe1
- Treatment
- saline conditionse1
- Outcome
- N uptakee1
- Direction
- greatere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“Under saline conditions imposed during pre-flowering, En-b0-1 formed heavier nodules, resulting in greater N uptake, higher photosynthetic activity, and greater biomass production compared with Enrei”
Claim · model-written summary
Under saline conditions before flowering, En-b0-1 had higher photosynthetic activity than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- pre-floweringe1
- Treatment
- saline conditionse1
- Outcome
- photosynthetic activitye1
- Direction
- highere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“Under saline conditions imposed during pre-flowering, En-b0-1 formed heavier nodules, resulting in greater N uptake, higher photosynthetic activity, and greater biomass production compared with Enrei”
Claim · model-written summary
Under saline conditions before flowering, En-b0-1 had greater biomass production than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- pre-floweringe1
- Treatment
- saline conditionse1
- Outcome
- biomass productione1
- Direction
- greatere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“Under saline conditions imposed during pre-flowering, En-b0-1 formed heavier nodules, resulting in greater N uptake, higher photosynthetic activity, and greater biomass production compared with Enrei”
Claim · model-written summary
Saline treatment increased sodium and chlorine concentrations in all plant parts regardless of genotype.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- all plant partse1
- Treatment
- Saline treatmente1
- Outcome
- concentrations of sodium (Na) and chlorine (Cl)e1
- Direction
- increasede1
- Qualifier
- regardless of genotypee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“Saline treatment increased the concentrations of sodium (Na) and chlorine (Cl) in all plant parts regardless of genotype”
Claim · model-written summary
En-b0-1 had significantly lower Na and Cl concentrations in shoots than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- shootse1
- Outcome
- concentrations of these elements in shootse1
- Direction
- lowere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“but in En-b0-1, the concentrations of these elements in shoots were significantly lower, while those in roots and nodules were higher than in Enrei”
Claim · model-written summary
En-b0-1 had higher Na and Cl concentrations in roots and nodules than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- roots and nodulese1
- Outcome
- concentrationse1
- Direction
- highere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“but in En-b0-1, the concentrations of these elements in shoots were significantly lower, while those in roots and nodules were higher than in Enrei”
Claim · model-written summary
When salinity was imposed during reproductive growth stages, En-b0-1 maintained higher N uptake than Enrei.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- reproductive growth stagese1
- Treatment
- salinity treatmente1
- Outcome
- N uptakee1
- Direction
- highere1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“When the salinity treatment was imposed during the reproductive growth stages, En-b0-1 maintained higher N uptake, leading to better alleviation of salinity-induced yield reduction than in Enrei”
Claim · model-written summary
En-b0-1 gave better alleviation of salinity-induced yield reduction than Enrei when salinity was imposed during reproductive growth stages.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Organ / stage
- reproductive growth stagese1
- Treatment
- salinity treatmente1
- Outcome
- salinity-induced yield reductione1
- Direction
- better alleviatione1
- Comparator
- Enreie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“When the salinity treatment was imposed during the reproductive growth stages, En-b0-1 maintained higher N uptake, leading to better alleviation of salinity-induced yield reduction than in Enrei”
Claim · model-written summary
The super-nodulating En-b0-1 was more tolerant to salinity than its parental normal-nodulating cultivar.
- Taxon
- soybeanGlycine maxe0
- Material
- En-b0-1e1
- Treatment
- salinitye1
- Outcome
- tolerant to salinitye1
- Direction
- more tolerante1
- Comparator
- parental normal-nodulating cultivare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“The super-nodulating genotype En-b0-1 was more tolerant to salinity than its parental normal-nodulating cultivar, due to its superior nodulation and prevention of excessive accumulation of Na and Cl in shoots, which were retained in roots and nodules”
Claim · model-written summary
Superior nodulation and prevention of excessive Na and Cl accumulation in shoots may explain the salinity tolerance of En-b0-1.
- Taxon
- soybeanGlycine maxe0
- Outcome
- tolerant to salinitye1
- Qualifier
- superior nodulation and prevention of excessive accumulation of Na and Cl in shootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress causes various physiological dysfunctions in soybean (Glycine max (L.) Merr.)”
e1“The super-nodulating genotype En-b0-1 was more tolerant to salinity than its parental normal-nodulating cultivar, due to its superior nodulation and prevention of excessive accumulation of Na and Cl in shoots, which were retained in roots and nodules”
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