Abstract
Abstract The effects of salt stress on protein (PROT) content, lipid peroxidation, proline accumulation, chlorophyll (Chl) content, and superoxide dismutase (SOD; EC 1.15.1.1), catalase (EC 1.11.1.6) and peroxidase (EC 1.11.1.7) activity were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi). Four weeks after sowing (at the V 4 stage), plants were exposed to salt stress by the application of NaCl solution (200 m m ) for 6 days daily, After 6 days followed by foliar application of ascorbic acid (AsA) solution (25 m m ). The activity of all the antioxidant enzymes assayed (except SOD in the roots) was increased significantly in the plants under conditions of salt stress. The application of AsA decreased enzyme activity in the leaves, but it had no effect on enzyme activity in the roots. The total PROT content of the leaves and roots decreased under the conditions of high salinity. AsA treatment of plants under salt stress increased the total PROT content significantly in both leaves and roots. Measurement of the malondialdehyde content of leaves and roots showed that lipid peroxidation was increased by interaction with damaging reactive oxygen species during salt stress, and that application of AsA reduced lipid peroxidation only in the leaves. The Chl content was also affected by salt stress. There was significant difference between the controls and salt‐stress treatments in Chl content. The results of the present study indicate that usage of AsA reduces the harmful effects of salinity and increases resistance to salinity in canola plant.
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Claims 8
Claim · model-written summary
Salt stress increased the activity of antioxidant enzymes, except SOD in roots.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse7 - Organ / stage
- leaves and rootse7
- Treatment
- salt stresse0
- Outcome
- activity of all the antioxidant enzymes assayede0
- Direction
- increasede0
- Qualifier
- except SOD in the rootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The activity of all the antioxidant enzymes assayed (except SOD in the roots) was increased significantly in the plants under conditions of salt stress”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
Foliar application of AsA decreased enzyme activity in leaves.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- leavese1
- Treatment
- application of AsAe1
- Outcome
- enzyme activitye1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The application of AsA decreased enzyme activity in the leaves, but it had no effect on enzyme activity in the roots”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
Application of AsA had no effect on enzyme activity in roots.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- rootse1
- Treatment
- application of AsAe1
- Outcome
- enzyme activitye1
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The application of AsA decreased enzyme activity in the leaves, but it had no effect on enzyme activity in the roots”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
Salt stress decreased total protein content in leaves and roots.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- leaves and rootse2
- Treatment
- high salinitye2
- Outcome
- total PROT contente2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The total PROT content of the leaves and roots decreased under the conditions of high salinity”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
AsA treatment under salt stress increased total protein content in leaves and roots.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- leaves and rootse3
- Treatment
- AsA treatmente3
- Outcome
- total PROT contente3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“AsA treatment of plants under salt stress increased the total PROT content significantly in both leaves and roots”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
Salt stress increased lipid peroxidation in leaves and roots.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- leaves and rootse4
- Treatment
- salt stresse4
- Outcome
- lipid peroxidatione4
- Direction
- increasede4
- Qualifier
- by interaction with damaging reactive oxygen speciese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Measurement of the malondialdehyde content of leaves and roots showed that lipid peroxidation was increased by interaction with damaging reactive oxygen species during salt stress”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
AsA application reduced lipid peroxidation in leaves only.
- Taxon
- canolaBrassica napus var. napuse7
- Organ / stage
- leavese5
- Treatment
- application of AsAe5
- Outcome
- lipid peroxidatione5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“application of AsA reduced lipid peroxidation only in the leaves”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
Claim · model-written summary
Salt stress affected chlorophyll content, with a significant difference from controls.
- Taxon
- canolaBrassica napus var. napuse7
- Treatment
- salt stresse6
- Outcome
- Chl contente6
- Comparator
- controlse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The Chl content was also affected by salt stress”
e0“There was significant difference between the controls”
e7“were studied in the leaves and roots of canola ( Brassica napus L. cv. Okapi)”
The same questions in other papers
L-ascorbic acid · physiology: oxidative · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
salinity · quality: protein · Brassica napus (oilseed rape)Results differ
5 papers in the same direction as this paper
- no effect
- negative
- no effect
2 papers more in this group
See all 6 papers →salinity · physiology: oxidative · Brassica napus (oilseed rape)Positive and negative results
19 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- negative
17 papers more in this group
See all 21 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.