Abstract
The activity of antioxidative enzymes system is affected by salt stress, chlorophyll content (CHL), leaf relative water content (RWC), Na+ and K+ contents, their ratio and some oxidative stress indices were studied in leaves of ten bread wheat cultivarsSehar-06, Lu-26, NARC-09, BARC-09 and Pirsbak-09’(salt-tolerant) and Kaghan-94, Rohtas-90, Soughat-90, Shaheen-94 and Zardana-89’(salt-sensitive), grown under salinity treatments carried out in five levels (1 dS·m-1 as control, 2, 4, 8, 16 dS·m-1) via sodium chloride. Under high salt potency significant increase for activities of antioxidant enzymes such as ascorbate peroxidase (APX) and guiacol peroxidase (GPX), occured in salt tolerant varieties. Meanwhile, under salinity condition the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT) and (GPX) in sensitive cultivar were lower than control. Regarding (APX) activity there was no significant difference between salinity and control situation. Under salt stress membrane stability index (MSI) of both cultivars were negatively influenced. Hydrogen peroxide (H2O2) content of salinity sensitive cultivars was higher than control. Salt tolerant varieties had more amounts of K+ content, K+ and Na+ ratio, relative water content, yield and chlorophyll under salt conditions, and sensitive ones recorded higher Na+ content at tillering stage. The mechanism of salt stress might be achieved due to low lipid peroxidation, assumingly lower changes in membrane stability index and evasion of Na+ combination and amplified activity of antioxidant enzymes.
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Claims 9
Claim · model-written summary
High salinity significantly increased APX and GPX activities in salt tolerant wheat varieties.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- salt tolerant varietiese0
- Treatment
- high salt potencye0
- Outcome
- activities of antioxidant enzymes such as ascorbate peroxidase (APX) and guiacol peroxidase (GPX)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Under high salt potency significant increase for activities of antioxidant enzymes such as ascorbate peroxidase (APX) and guiacol peroxidase (GPX), occured in salt tolerant varieties.”
Claim · model-written summary
Under salinity, SOD, CAT, and GPX activities in sensitive wheat cultivars were lower than control.
- Taxon
- WheatTriticum aestivumt0
- Material
- sensitive cultivare0
- Treatment
- salinity conditione0
- Outcome
- activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT) and (GPX)e0
- Direction
- lowere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“under salinity condition the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT) and (GPX) in sensitive cultivar were lower than control.”
Claim · model-written summary
APX activity did not significantly differ between salinity and control conditions.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- salinitye0
- Outcome
- (APX) activitye0
- Direction
- no significant differencee0
- Comparator
- control situatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Regarding (APX) activity there was no significant difference between salinity and control situation.”
Claim · model-written summary
Salt stress negatively influenced membrane stability index in both cultivar groups.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- salt stresse0
- Outcome
- membrane stability index (MSI)e0
- Direction
- negatively influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Under salt stress membrane stability index (MSI) of both cultivars were negatively influenced.”
Claim · model-written summary
Hydrogen peroxide content in sensitive wheat cultivars was higher than control.
- Taxon
- WheatTriticum aestivumt0
- Material
- salinity sensitive cultivarse0
- Outcome
- Hydrogen peroxide (H2O2) contente0
- Direction
- highere0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Hydrogen peroxide (H2O2) content of salinity sensitive cultivars was higher than control.”
Claim · model-written summary
Salt tolerant wheat varieties had more K+ content, K+ to Na+ ratio, and relative water content under salinity.
- Taxon
- WheatTriticum aestivumt0
- Material
- Salt tolerant varietiese0
- Treatment
- salt conditionse0
- Outcome
- K+ content, K+ and Na+ ratio, relative water contente0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Salt tolerant varieties had more amounts of K+ content, K+ and Na+ ratio, relative water content, yield and chlorophyll under salt conditions”
Claim · model-written summary
Salt tolerant wheat varieties had more yield and chlorophyll under salinity.
- Taxon
- WheatTriticum aestivumt0
- Material
- Salt tolerant varietiese0
- Treatment
- salt conditionse0
- Outcome
- yield and chlorophylle0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Salt tolerant varieties had more amounts of K+ content, K+ and Na+ ratio, relative water content, yield and chlorophyll under salt conditions”
Claim · model-written summary
Sensitive wheat varieties recorded higher Na+ content at tillering.
- Taxon
- WheatTriticum aestivumt0
- Material
- sensitive onese0
- Organ / stage
- tillering stagee0
- Outcome
- Na+ contente0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“sensitive ones recorded higher Na+ content at tillering stage.”
Claim · model-written summary
The authors hypothesize that tolerance involves lower lipid peroxidation, smaller membrane stability changes, sodium avoidance, and higher antioxidant enzyme activity.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- mechanism of salt stresse0
- Qualifier
- low lipid peroxidation, assumingly lower changes in membrane stability index and evasion of Na+ combination and amplified activity of antioxidant enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“The mechanism of salt stress might be achieved due to low lipid peroxidation, assumingly lower changes in membrane stability index and evasion of Na+ combination and amplified activity of antioxidant enzymes.”
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