Abstract
In order to investigate the solutes accumulation associated with salt tolerance of rice (Oryza sativa L.), two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive) were grown hydroponically in the Youshida nutrient solution. Salinity treatment was imposed 3 weeks after sowing using NaCl in two levels 0 and 100 mmol. Samples were separately collected from the youngest (sixth) leaves, leaf sheaths and roots at 72 and 240 h after salinization; then Na+, K+, Ca2+, Mg2+, P, Mn2+, Cl- and total soluble sugars concentration and Na+/K+ ratio were determined. Total dry weight of both genotypes decreased with the application of NaCl. Salinity caused higher accumulation of Na+ and Cl- in the sixth leaf and leaf sheath of IR29 than in IR651 while their concentration in root of IR651 was higher. K+ concentration was decreased in the sixth leaf and leaf sheath of IR29 under NaCl stress. Reduction in Ca2+ and Mg2+ concentrations were observed in sixth leaves of both genotypes. P concentration was increased in leaf sheath and root of IR29 under saline conditions while it showed no changes in IR651. Our results indicated that the tolerant genotype had mechanisms to prevent high Na+ and Cl- accumulation in the sixth leaf. High total soluble sugars concentration in shoot of IR651 is probably for adjusting osmotic potential and better water uptake under salinity. These mechanisms help plant to avoid tissue death and enable to continue its growth and development under saline conditions.
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Claims 9
Claim · model-written summary
Total dry weight of both rice genotypes decreased with NaCl application.
- Taxon
- rice
Oryza sativae0 - Treatment
- NaCle1
- Outcome
- Total dry weighte1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“Total dry weight of both genotypes decreased with the application of NaCl”
Claim · model-written summary
Salinity caused higher Na+ and Cl- accumulation in the sixth leaf and leaf sheath of IR29 than IR651.
- Taxon
- riceOryza sativae0
- Material
- IR29e1
- Organ / stage
- sixth leaf and leaf sheathe1
- Treatment
- Salinitye1
- Outcome
- accumulation of Na+ and Cl-e1
- Direction
- highere1
- Comparator
- IR651e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“Salinity caused higher accumulation of Na+ and Cl- in the sixth leaf and leaf sheath of IR29 than in IR651”
Claim · model-written summary
Na+ and Cl- concentration in roots was higher in IR651 than in IR29 under salinity.
- Taxon
- riceOryza sativae0
- Material
- IR651e2
- Organ / stage
- roote2
- Treatment
- Salinitye1
- Outcome
- accumulation of Na+ and Cl-e1
- Direction
- highere2
- Comparator
- IR29e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“Salinity caused higher accumulation of Na+ and Cl- in the sixth leaf and leaf sheath of IR29 than in IR651”
e2“while their concentration in root of IR651 was higher”
Claim · model-written summary
K+ concentration decreased in the sixth leaf and leaf sheath of IR29 under NaCl stress.
- Taxon
- riceOryza sativae0
- Material
- IR29e1
- Organ / stage
- sixth leaf and leaf sheathe1
- Treatment
- NaCl stresse1
- Outcome
- K+ concentratione1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“K+ concentration was decreased in the sixth leaf and leaf sheath of IR29 under NaCl stress”
Claim · model-written summary
Ca2+ and Mg2+ concentrations were reduced in sixth leaves of both genotypes.
- Taxon
- riceOryza sativae0
- Organ / stage
- sixth leavese1
- Outcome
- Ca2+ and Mg2+ concentrationse1
- Direction
- Reductione1
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“Reduction in Ca2+ and Mg2+ concentrations were observed in sixth leaves of both genotypes”
Claim · model-written summary
P concentration increased in leaf sheath and root of IR29 under saline conditions.
- Taxon
- riceOryza sativae0
- Material
- IR29e1
- Organ / stage
- leaf sheath and roote1
- Treatment
- saline conditionse1
- Outcome
- P concentratione1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“P concentration was increased in leaf sheath and root of IR29 under saline conditions”
Claim · model-written summary
P concentration showed no change in IR651 under saline conditions.
- Taxon
- riceOryza sativae0
- Material
- IR651e1
- Treatment
- saline conditionse1
- Outcome
- P concentratione1
- Direction
- no changese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“P concentration was increased in leaf sheath and root of IR29 under saline conditions while it showed no changes in IR651”
Claim · model-written summary
The authors conclude the tolerant genotype had mechanisms preventing high Na+ and Cl- accumulation in the sixth leaf.
- Taxon
- riceOryza sativae0
- Material
- tolerant genotypee1
- Organ / stage
- sixth leafe1
- Outcome
- high Na+ and Cl- accumulatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“the tolerant genotype had mechanisms to prevent high Na+ and Cl- accumulation in the sixth leaf”
Claim · model-written summary
High total soluble sugars concentration in shoot of IR651 is probably for osmotic adjustment and better water uptake under salinity.
- Taxon
- riceOryza sativae0
- Material
- IR651e1
- Organ / stage
- shoote1
- Treatment
- salinitye1
- Outcome
- High total soluble sugars concentratione1
- Qualifier
- adjusting osmotic potential and better water uptakee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive)”
e1“High total soluble sugars concentration in shoot of IR651 is probably for adjusting osmotic potential and better water uptake under salinity”
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See all 40 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.