Abstract
The effects of salinity on growth, leaf area and water relations of two grape genotypes (Gharashani and Shirazi) were studied under 2-week salinity (25, 50 and 100 mM NaCl). Growth and fresh weights of all plant parts were significantly (p<0.05) decreased by increasing salinity in both genotypes. Shirazi showed a higher decrease in shoot and root lengths and fresh weights than Gharashani. It also had a higher decrease in water potential and relative water content and a lower increase in leaf area as compared with Gharashani. There was a significant positive correlation (p<0.05) between water potential and leaf area in two genotypes. Under salinity stress the expression of aquaporin PIP2.2 decreased significantly (p<0.05) in roots and leaves of Gharashani, but it was higher in roots than in leaves. In roots and leaves of Shirazi the expression of this gene was partly increased. Considering growth factors and water relations, it seems that Shirazi is a sensitive genotype, but Gharashani can partly tolerate salinity.
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Claims 10
Claim · model-written summary
Increasing salinity significantly decreased growth and fresh weights of all plant parts in both grape genotypes.
- Taxon
- GRAPEt0
- Treatment
- increasing salinitye0
- Outcome
- Growth and fresh weights of all plant partse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Growth and fresh weights of all plant parts were significantly (p<0.05) decreased by increasing salinity in both genotypes.”
t0“GRAPE”
Claim · model-written summary
Shirazi had a greater salinity-induced decrease in shoot and root lengths than Gharashani.
Verbatim
e0“Shirazi showed a higher decrease in shoot and root lengths and fresh weights than Gharashani.”
t0“GRAPE”
t1“2-week salinity (25, 50 and 100 mM NaCl)”
Claim · model-written summary
Shirazi had a greater salinity-induced decrease in fresh weights than Gharashani.
Verbatim
e0“Shirazi showed a higher decrease in shoot and root lengths and fresh weights than Gharashani.”
t0“GRAPE”
t1“2-week salinity (25, 50 and 100 mM NaCl)”
Claim · model-written summary
Shirazi had a greater decrease in water potential and relative water content than Gharashani.
Verbatim
e0“It also had a higher decrease in water potential and relative water content and a lower increase in leaf area as compared with Gharashani.”
t0“GRAPE”
e1“Shirazi showed a higher decrease in shoot and root lengths and fresh weights than Gharashani”
e2“2-week salinity (25, 50 and 100 mM NaCl)”
Claim · model-written summary
Shirazi had a smaller increase in leaf area than Gharashani.
Verbatim
e0“a lower increase in leaf area as compared with Gharashani.”
t0“GRAPE”
e1“Shirazi showed a higher decrease in shoot and root lengths and fresh weights than Gharashani”
e2“2-week salinity (25, 50 and 100 mM NaCl)”
Claim · model-written summary
Water potential and leaf area were significantly positively correlated in both grape genotypes.
Verbatim
e0“There was a significant positive correlation (p<0.05) between water potential and leaf area in two genotypes.”
t0“GRAPE”
Claim · model-written summary
Salinity significantly decreased PIP2.2 expression in roots and leaves of Gharashani.
- Taxon
- GRAPEt0
- Material
- Gharashanie0
- Organ / stage
- roots and leavese0
- Treatment
- salinity stresse0
- Gene
- aquaporin PIP2.2e0
- Outcome
- expression of aquaporin PIP2.2e0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Under salinity stress the expression of aquaporin PIP2.2 decreased significantly (p<0.05) in roots and leaves of Gharashani”
t0“GRAPE”
Claim · model-written summary
PIP2.2 expression was higher in Gharashani roots than leaves.
Verbatim
e0“but it was higher in roots than in leaves.”
t0“GRAPE”
e1“in roots and leaves of Gharashani, but it was higher”
e2“expression of aquaporin PIP2.2”
Claim · model-written summary
PIP2.2 expression partly increased in roots and leaves of Shirazi under salinity.
- Taxon
- GRAPEt0
- Material
- Shirazie0
- Organ / stage
- roots and leavese0
- Treatment
- salinity stresse2
- Gene
- aquaporin PIP2.2e1
- Outcome
- expression of this genee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“In roots and leaves of Shirazi the expression of this gene was partly increased.”
t0“GRAPE”
e1“aquaporin PIP2.2”
e2“salinity stress”
Claim · model-written summary
The authors interpret Shirazi as salinity sensitive and Gharashani as partly tolerant.
Verbatim
e0“it seems that Shirazi is a sensitive genotype, but Gharashani can partly tolerate salinity.”
t0“GRAPE”
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