Abstract
The effects of exogenous ascorbic acid and silicium on leaf fresh weigh, seed yield, photosynthesis, changes of the activities of major antioxidant enzymes, nitrate reductase activity, proline accumulation, chlorophyll content, and fatty acid composition were investigated in salt-stressed canola. A hydroponic pot experiment was conducted based on randomized complete block design, factorial arrangement was used with 16 combinations of salinity stress (0, 100, 200, and 300 mmol L−1 NaCl), ascorbic acid (0 and 30 mmol L−1), and silicium (2 and 4 mmol L−1 from potassium silicate) with three replicates. The results showed that salinity significantly decreased leaf area and leaf fresh weight, seed yield, photosynthesis, nitrate reductase activity, chlorophyll content, and seed protein percentage. Conversely, respiration, antioxidant enzymes activity, proline accumulation, and linolenic acid percentage increased due to salt stress. Ascorbic acid application improved photosynthesis and seed yield and mitigated antioxidant enzyme activity. In addition, nitrate reductase activity and chlorophyll a and b were positively affected by ascorbic acid. Regarding silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased, while respiration decreased. Furthermore, silicium had not significant effect on antioxidant enzyme activity. In general, ascorbic acid and silicium were involved in the defensive mechanisms against salinity stress and it can be suggested that, ascorbic acid and silicium application had positive effect on canola growth under conditions of salt stress.
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Claims 14
Claim · model-written summary
Salt stress significantly decreased leaf area, leaf fresh weight and seed yield in canola.
- Taxon
- Canola
.jpg?width=60)
Brassica napus var. napust0 - Treatment
- salinitye0
- Outcome
- leaf area and leaf fresh weight, seed yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“salinity significantly decreased leaf area and leaf fresh weight, seed yield”
t0“Canola”
Claim · model-written summary
Salt stress significantly decreased photosynthesis, nitrate reductase activity and chlorophyll content in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- salinitye0
- Outcome
- photosynthesis, nitrate reductase activity, chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity significantly decreased leaf area and leaf fresh weight, seed yield, photosynthesis, nitrate reductase activity, chlorophyll content”
t0“Canola”
Claim · model-written summary
Salt stress significantly decreased seed protein percentage in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- salinitye0
- Outcome
- seed protein percentagee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity significantly decreased leaf area and leaf fresh weight, seed yield, photosynthesis, nitrate reductase activity, chlorophyll content, and seed protein percentage”
t0“Canola”
Claim · model-written summary
Salt stress increased respiration, antioxidant enzyme activity and proline accumulation in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- salt stresse0
- Outcome
- respiration, antioxidant enzymes activity, proline accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“respiration, antioxidant enzymes activity, proline accumulation, and linolenic acid percentage increased due to salt stress”
t0“Canola”
Claim · model-written summary
Salt stress increased linolenic acid percentage in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- salt stresse0
- Outcome
- linolenic acid percentagee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“respiration, antioxidant enzymes activity, proline accumulation, and linolenic acid percentage increased due to salt stress”
t0“Canola”
Claim · model-written summary
Ascorbic acid application improved photosynthesis and seed yield in salt-stressed canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- Ascorbic acid applicatione0
- Outcome
- photosynthesis and seed yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ascorbic acid application improved photosynthesis and seed yield”
t0“Canola”
Claim · model-written summary
Ascorbic acid application mitigated antioxidant enzyme activity in salt-stressed canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- Ascorbic acid applicatione0
- Outcome
- antioxidant enzyme activitye0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ascorbic acid application improved photosynthesis and seed yield and mitigated antioxidant enzyme activity”
t0“Canola”
Claim · model-written summary
Nitrate reductase activity and chlorophyll a and b were positively affected by ascorbic acid in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- ascorbic acide0
- Outcome
- nitrate reductase activity and chlorophyll a and be0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrate reductase activity and chlorophyll a and b were positively affected by ascorbic acid”
t0“Canola”
Claim · model-written summary
Silicium application increased leaf area, leaf fresh weight and seed yield in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- silicium applicatione0
- Outcome
- leaf area, leaf fresh weight, seed yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased”
t0“Canola”
Claim · model-written summary
Silicium application increased photosynthesis, ascorbate peroxidase activity and nitrate reductase activity in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- silicium applicatione0
- Outcome
- photosynthesis, ascorbate peroxidase activity, nitrate reductase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased”
t0“Canola”
Claim · model-written summary
Silicium application increased chlorophyll content in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- silicium applicatione0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased”
t0“Canola”
Claim · model-written summary
Silicium application decreased respiration in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- silicium applicatione0
- Outcome
- respiratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicium application, that was found that leaf area, leaf fresh weight, seed yield and photosynthesis, ascorbate peroxidase activity, nitrate reductase activity, and chlorophyll content increased, while respiration decreased”
t0“Canola”
Claim · model-written summary
Silicium had no significant effect on antioxidant enzyme activity in canola.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- siliciume0
- Outcome
- antioxidant enzyme activitye0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicium had not significant effect on antioxidant enzyme activity”
t0“Canola”
Claim · model-written summary
The authors conclude that ascorbic acid and silicium application had a positive effect on canola growth under salt stress.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- ascorbic acid and silicium applicatione0
- Outcome
- canola growthe0
- Direction
- positive effecte0
- Qualifier
- salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ascorbic acid and silicium application had positive effect on canola growth under conditions of salt stress”
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See all 20 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.