Abstract
Salinity stress causes accumulation of reactive oxygen species (ROS) to levels that are toxic to plants. Inefficient scavenging of ROS by antioxidant enzymes like superoxide dismutase (SOD; EC 1.15.1.1) results in cell death and inhibition of growth, which ultimately leads to reduced crop productivity. Recent studies suggest that nitric oxide (NO) can enhance plant tolerance to salinity stress but the molecular mechanism for the NO-mediated salinity stress tolerance is only partially understood. This study thus evaluated the effect of exogenously applied NO on maize leaf superoxide accumulation and SOD enzymatic activity in the presence and absence of salinity stress to delineate SOD isoforms that contribute to NO-mediated salinity tolerance. Salinity stress caused elevation of superoxide generation and lipid peroxidation in maize leaves, along with elevated activity of a number of SOD isoforms. Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO) to salinity-treated maize reduced the salinity-induced superoxide accumulation and lowered the salinity-induced lipid peroxidation in maize leaves and corresponded with an amplification of the increase in the activity of some SOD isoforms. Based on this analysis, the study suggests that exogenously applied NO reduces salinity-induced oxidative stress by up-regulating the enzymatic activity of some SOD isoforms, thus increasing the scavenging of excessive superoxide radicals to limit oxidative stress.
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Claims 6
Claim · model-written summary
Salinity stress elevated superoxide generation in maize leaves.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress caused elevation of superoxide generation and lipid peroxidation in maize leaves, along with elevated activity of a number of SOD isoforms.”
Claim · model-written summary
Salinity stress elevated lipid peroxidation in maize leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress caused elevation of superoxide generation and lipid peroxidation in maize leaves, along with elevated activity of a number of SOD isoforms.”
Claim · model-written summary
Salinity stress elevated activity of several SOD isoforms in maize leaves.
- Treatment
- Salinity stresse0
- Gene
- SOD isoformse0
- Outcome
- activity of a number of SOD isoformse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress caused elevation of superoxide generation and lipid peroxidation in maize leaves, along with elevated activity of a number of SOD isoforms.”
Claim · model-written summary
DETA/NO reduced salinity induced superoxide accumulation in maize.
- Treatment
- Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO)e0
- Outcome
- superoxide accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO) to salinity-treated maize reduced the salinity-induced superoxide accumulation and lowered the salinity-induced lipid peroxidation in maize leaves and corresponded with an amplification of the increase in the activity of some SOD isoforms.”
Claim · model-written summary
DETA/NO lowered salinity induced lipid peroxidation in maize leaves.
- Treatment
- Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO)e0
- Outcome
- lipid peroxidatione0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO) to salinity-treated maize reduced the salinity-induced superoxide accumulation and lowered the salinity-induced lipid peroxidation in maize leaves and corresponded with an amplification of the increase in the activity of some SOD isoforms.”
Claim · model-written summary
DETA/NO amplified the salinity associated increase in activity of some SOD isoforms.
- Treatment
- Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO)e0
- Gene
- SOD isoformse0
- Outcome
- activity of some SOD isoformse0
- Direction
- amplification of the increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of 2,2′-(hydroxynitrosohydrazono)bis-ethanimine (DETA/NO) to salinity-treated maize reduced the salinity-induced superoxide accumulation and lowered the salinity-induced lipid peroxidation in maize leaves and corresponded with an amplification of the increase in the activity of some SOD isoforms.”
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See all 51 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.