Abstract
A greenhouse hydroponic experiment was performed using salt-tolerant (cv. Suntop) and -sensitive (Sunmate) wheat cultivars and a salt-tolerant barley cv. CM72 to evaluate how cultivar and species differ in response to salinity stress. Results showed that wheat cv. Suntop performed high tolerance to salinity, being similar tolerance to salinity with CM72, compared with cv. Sunmate. Similar to CM72, Suntop recorded less salinity induced increase in malondialdehyde (MDA) accumulation and less reduction in plant height, net photosynthetic rate (Pn), chlorophyll content, and biomass than in sensitive wheat cv. Sunmate. Significant time-course and cultivar-dependent changes were observed in the activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) in roots and leaves after salinity treatment. Higher activities were found in CM72 and Suntop compared to Sunmate. Furthermore, a clear modification was observed in leaf and root ultrastructure after NaCl treatment with more obvious changes in the sensitive wheat cv. Sunmate, rather than in CM72 and Suntop. Although differences were observed between CM72 and Suntop in the growth and biochemical traits assessed and modified by salt stress, the differences were negligible in comparison with the general response to the salt stress of sensitive wheat cv. Sunmate. In addition, salinity stress induced an increase in the Na+ and Na+/K+ ratio but a reduction in K+ concentrations, most prominently in Sunmate and followed by Suntop and CM72.
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Claims 10
Claim · model-written summary
Suntop tolerance was comparable with CM72 and exceeded Sunmate.
- Taxon
- wheat
Triticum aestivume0 - Material
- Suntope0
- Outcome
- tolerance to salinitye0
- Direction
- highe0
- Comparator
- cv. Sunmatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat cv. Suntop performed high tolerance to salinity, being similar tolerance to salinity with CM72, compared with cv. Sunmate”
Claim · model-written summary
Suntop had less salt-induced MDA accumulation than Sunmate.
- Taxon
- wheatTriticum aestivume0
- Material
- Suntope0
- Treatment
- salinitye0
- Outcome
- malondialdehyde (MDA) accumulatione0
- Direction
- lesse0
- Comparator
- Sunmatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suntop recorded less salinity induced increase in malondialdehyde (MDA) accumulation and less reduction in plant height, net photosynthetic rate (Pn), chlorophyll content, and biomass than in sensitive wheat cv. Sunmate”
Claim · model-written summary
Suntop had less salt-induced reduction in plant height and biomass than Sunmate.
- Taxon
- wheatTriticum aestivume0
- Material
- Suntope0
- Treatment
- salinitye0
- Outcome
- plant height, net photosynthetic rate (Pn), chlorophyll content, and biomasse0
- Direction
- less reductione0
- Comparator
- Sunmatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suntop recorded less salinity induced increase in malondialdehyde (MDA) accumulation and less reduction in plant height, net photosynthetic rate (Pn), chlorophyll content, and biomass than in sensitive wheat cv. Sunmate”
Claim · model-written summary
Antioxidant enzyme activities varied significantly by time and cultivar after salinity treatment.
- Taxon
- Wheat and Barley
.jpg?width=60)
Hordeum vulgareTriticum aestivumt0 - Organ / stage
- roots and leavese0
- Treatment
- salinity treatmente0
- Outcome
- activities of antioxidant enzymese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Significant time-course and cultivar-dependent changes were observed in the activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) in roots and leaves after salinity treatment”
t0“Wheat and Barley”
Claim · model-written summary
CM72 had higher antioxidant enzyme activities than Sunmate.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Material
- CM72e0
- Outcome
- activities of antioxidant enzymese1
- Direction
- Highere0
- Comparator
- Sunmatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher activities were found in CM72 and Suntop compared to Sunmate”
e1“activities of antioxidant enzymes”
t0“Wheat and Barley”
Claim · model-written summary
Suntop had higher antioxidant enzyme activities than Sunmate.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Material
- Suntope0
- Outcome
- activities of antioxidant enzymese1
- Direction
- Highere0
- Comparator
- Sunmatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher activities were found in CM72 and Suntop compared to Sunmate”
e1“activities of antioxidant enzymes”
t0“Wheat and Barley”
Claim · model-written summary
NaCl modified leaf and root ultrastructure most visibly in Sunmate.
- Taxon
- wheatTriticum aestivume0
- Material
- Sunmatee0
- Treatment
- NaCl treatmente0
- Outcome
- leaf and root ultrastructuree0
- Direction
- more obvious changese0
- Comparator
- CM72 and Suntope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a clear modification was observed in leaf and root ultrastructure after NaCl treatment with more obvious changes in the sensitive wheat cv. Sunmate, rather than in CM72 and Suntop”
Claim · model-written summary
Salinity raised Na+ concentration, especially in Sunmate.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Material
- Sunmatee0
- Treatment
- salinity stresse0
- Outcome
- Na+e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity stress induced an increase in the Na+ and Na+/K+ ratio but a reduction in K+ concentrations, most prominently in Sunmate and followed by Suntop and CM72”
t0“Wheat and Barley”
Claim · model-written summary
Salinity raised the Na+/K+ ratio, especially in Sunmate.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Material
- Sunmatee0
- Treatment
- salinity stresse0
- Outcome
- Na+/K+ ratioe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity stress induced an increase in the Na+ and Na+/K+ ratio but a reduction in K+ concentrations, most prominently in Sunmate and followed by Suntop and CM72”
t0“Wheat and Barley”
Claim · model-written summary
Salinity reduced K+ concentration, especially in Sunmate.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Material
- Sunmatee0
- Treatment
- salinity stresse0
- Outcome
- K+ concentrationse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity stress induced an increase in the Na+ and Na+/K+ ratio but a reduction in K+ concentrations, most prominently in Sunmate and followed by Suntop and CM72”
t0“Wheat and Barley”
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