Abstract
Abstract Soil salinity disturbs the equilibrium between reactive oxygen species ( ROS ) production and removal, leading to a dramatic increase in ROS concentration and oxidative damage. Enzymatic scavenging is one of the two main mechanisms involved in ROS detoxification in plants. This study has investigated the role of major antioxidant ( AO ) enzymes in mitigating salinity‐induced oxidative stress in plant shoots. Firstly, two barley varieties were used to evaluate the activity of major AO enzymes in different leaves and at different times after salt treatment. Our results showed that AO enzyme activities had strong tissue and time specificity. A further study was conducted using six barley varieties contrasting in salinity tolerance. AO enzyme activities and proline contents were measured in the third leaves of seedlings after plants were treated with 240 m m NaCl for 10 days. No significant correlation was revealed between leaf AO activity and either plant grain yield or plant survival rate under salt stress. In contrast, a significant increase in leaf proline content under salt stress was found in all sensitive varieties, while in most tolerant varieties, salt stress did not change leaf proline level. It is concluded that although salinity induces changes in leaf AO enzyme activities, the changes cannot be used as biochemical indicators in breeding for salinity tolerance.
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Claims 6
Claim · model-written summary
Antioxidant enzyme activities in barley leaves showed strong tissue and time specificity after salt treatment.
- Taxon
- barley
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Hordeum vulgaree2 - Organ / stage
- different leavese2
- Treatment
- salt treatmente2
- Outcome
- AO enzyme activitiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Our results showed that AO enzyme activities had strong tissue and time specificity”
e2“two barley varieties were used to evaluate the activity of major AO enzymes in different leaves and at different times after salt treatment”
Claim · model-written summary
Leaf antioxidant enzyme activity showed no significant correlation with grain yield or plant survival rate under salt stress.
- Taxon
- barleyHordeum vulgaree4
- Organ / stage
- leafe3
- Treatment
- salt stresse3
- Outcome
- plant grain yield or plant survival ratee3
- Direction
- No significant correlatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“No significant correlation was revealed between leaf AO activity and either plant grain yield or plant survival rate under salt stress”
e4“A further study was conducted using six barley varieties contrasting in salinity tolerance”
Claim · model-written summary
Salt stress significantly increased leaf proline content in all sensitive barley varieties.
- Taxon
- barleyHordeum vulgaree4
- Treatment
- salt stresse5
- Outcome
- leaf proline contente5
- Direction
- increasee5
- Qualifier
- in all sensitive varietiese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A further study was conducted using six barley varieties contrasting in salinity tolerance”
e5“a significant increase in leaf proline content under salt stress was found in all sensitive varieties”
Claim · model-written summary
Salt stress did not change leaf proline level in most tolerant barley varieties.
- Taxon
- barleyHordeum vulgaree4
- Treatment
- salt stresse6
- Outcome
- leaf proline levele6
- Direction
- did not changee6
- Qualifier
- in most tolerant varietiese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A further study was conducted using six barley varieties contrasting in salinity tolerance”
e6“while in most tolerant varieties, salt stress did not change leaf proline level”
Claim · model-written summary
Changes in leaf AO enzyme activities cannot be used as biochemical indicators in breeding for salinity tolerance.
- Taxon
- barleyHordeum vulgaree4
- Outcome
- biochemical indicators in breeding for salinity tolerancee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A further study was conducted using six barley varieties contrasting in salinity tolerance”
e7“It is concluded that although salinity induces changes in leaf AO enzyme activities, the changes cannot be used as biochemical indicators in breeding for salinity tolerance”
Claim · model-written summary
Salinity induced changes in leaf antioxidant enzyme activities of barley.
- Taxon
- barleyHordeum vulgaree4
- Treatment
- salinitye7
- Outcome
- leaf AO enzyme activitiese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“A further study was conducted using six barley varieties contrasting in salinity tolerance”
e7“It is concluded that although salinity induces changes in leaf AO enzyme activities, the changes cannot be used as biochemical indicators in breeding for salinity tolerance”
The same questions in other papers
salinity · physiology: osmolytes · Hordeum vulgare (barley)Positive and negative results
5 papers in the same direction as this paper · 6 in the opposite direction
- negative
- positive
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8 papers more in this group
See all 12 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.