Abstract
Soil salinity and semi-arid and arid climate of Pakistan is a major constraint in agriculture and predominantly in foodstuff production. It limits crop yield and use of land previously uncultivated. Wheat is moderately salt tolerant. A great variation was observed between and within the cultivars (genotypes: S-24 salt tolerant and DN-27 salt sensitive) in relationship to the choice of salinity level (control and treatments: in increment of 25 mol/m3 NaCl/day to a final level of 80 and 160 mol/m3 NaCl into the nutrient solution) that will be used for screening purpose. Relative water content (RWC), membrane stability index and the activities of some antioxidant enzymes were determined after 20 and 40 days of salt stress exposure. As a result of activity enzymes, superoxide dismutase (SOD), peroxidase (POD) and catalase increased in S-24 with the increase of salt stress, while in DN-27 all the enzymes showed constant activity at all the stress levels. Meanwhile, relative water content and membrane stability index decrease the value as well as they increases the stress levels. It can be concluded that all three antioxidant enzymes were limiting factors for these genotypes and these reasons also led to the salt sensitivity in DN-27. Different selection methods should be applied to improve different traits in different conditions in wheat.
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Claims 5
Claim · model-written summary
Superoxide dismutase, peroxidase and catalase activities increased in salt-tolerant cultivar S-24 with increasing salt stress.
- Taxon
- wheat
Triticum aestivumt0 - Material
- S-24e1
- Treatment
- salt stresse1
- Outcome
- superoxide dismutase (SOD), peroxidase (POD) and catalasee1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum L.) cultivars growing under salt stress”
e1“superoxide dismutase (SOD), peroxidase (POD) and catalase increased in S-24 with the increase of salt stress”
Claim · model-written summary
Antioxidant enzyme activities in salt-sensitive cultivar DN-27 remained constant at all salt stress levels.
- Taxon
- wheatTriticum aestivumt0
- Material
- DN-27e2
- Treatment
- all the stress levelse2
- Outcome
- all the enzymese2
- Direction
- no_changeinferrede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum L.) cultivars growing under salt stress”
e2“in DN-27 all the enzymes showed constant activity at all the stress levels”
Claim · model-written summary
Relative water content and membrane stability index decreased as salt stress levels increased in wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- stress levelse3
- Outcome
- relative water content and membrane stability indexe3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum L.) cultivars growing under salt stress”
e3“relative water content and membrane stability index decrease the value as well as they increases the stress levels”
Claim · model-written summary
All three antioxidant enzymes were limiting factors that led to salt sensitivity in DN-27 wheat.
- Taxon
- wheatTriticum aestivumt0
- Material
- DN-27e4
- Outcome
- salt sensitivitye4
- Qualifier
- all three antioxidant enzymes were limiting factorse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum L.) cultivars growing under salt stress”
e4“It can be concluded that all three antioxidant enzymes were limiting factors for these genotypes and these reasons also led to the salt sensitivity in DN-27”
Claim · model-written summary
Different selection methods should be applied to improve different traits in wheat under different conditions.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- improve different traitse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum L.) cultivars growing under salt stress”
e5“Different selection methods should be applied to improve different traits in different conditions in wheat”