Abstract
To determine NaCl effects on growth and some antioxidant enzymes activity, the internode cuttings of four potato cultivars (Solanum tuberosum L.), Agria, Kennebec (relatively salt tolerant), Diamant and Ajax (relatively salt sensitive) were grown on callus inducing media amended with 0, 50, 100 and 150 mM NaCl at dark conditions. Callus growth of all cultivars was significantly reduced under salt stress. Total superoxide dismutase (SOD) activity decreased in all cultivars when calli were grown in the presence of NaCl. Peroxidase (POD), H2O2 detoxifying enzyme activity increased under salt stress, but at higher NaCl levels the activity was reduced. On the other hand, SOD and POD isozyme profiles at 100 mM NaCl were different from that of the control. These differences were quantitative and were expressed more in terms of increased or decreased isozymes activities. In dark conditions, callus tissue underwent oxidative stress in the presence of NaCl. In these conditions, more than any other SOD isozymes, MnSOD seems to play a major role in the scavenging of superoxide radicals during NaCl stress. Therefore, the increased Mn-SOD activity in salt treated-calli could reflect sustained O2 − production in the mitochondria. On the other hand, in spite of increased activities of Mn-SOD and POD, reactive oxygen species (ROS) had damaging effects on the plant cells due to the SOD reduced total activity. Generally, there was no difference between relatively salt sensitive and tolerant cultivars in response to NaCl stress.
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Claims 9
Claim · model-written summary
Salt stress significantly reduced callus growth in all four potato cultivars.
- Taxon
- Solanum tuberosum L.
Solanum tuberosumt0 - Treatment
- salt stresse0
- Outcome
- Callus growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Callus growth of all cultivars was significantly reduced under salt stress.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
NaCl decreased total SOD activity in calli of all cultivars.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- NaCle0
- Outcome
- Total superoxide dismutase (SOD) activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total superoxide dismutase (SOD) activity decreased in all cultivars when calli were grown in the presence of NaCl.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
POD activity increased under salt stress.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- salt stresse0
- Outcome
- Peroxidase (POD), H2O2 detoxifying enzyme activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peroxidase (POD), H2O2 detoxifying enzyme activity increased under salt stress, but at higher NaCl levels the activity was reduced.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
At higher NaCl levels, POD activity decreased.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- higher NaCl levelse0
- Outcome
- Peroxidase (POD), H2O2 detoxifying enzyme activitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peroxidase (POD), H2O2 detoxifying enzyme activity increased under salt stress, but at higher NaCl levels the activity was reduced.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
SOD and POD isozyme profiles at 100 mM NaCl differed from control.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- 100 mM NaCle0
- Outcome
- SOD and POD isozyme profilese0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SOD and POD isozyme profiles at 100 mM NaCl were different from that of the control.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
Potato callus underwent oxidative stress with NaCl in darkness.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Treatment
- NaCle0
- Outcome
- callus tissue underwent oxidative stresse0
- Setting
- dark conditionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In dark conditions, callus tissue underwent oxidative stress in the presence of NaCl.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
MnSOD seemed to have the major role in scavenging superoxide radicals during NaCl stress.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Gene
- MnSODe0
- Outcome
- scavenging of superoxide radicalse0
- Qualifier
- during NaCl stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than any other SOD isozymes, MnSOD seems to play a major role in the scavenging of superoxide radicals during NaCl stress.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
Reactive oxygen species damaged plant cells despite increased Mn-SOD and POD activities.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Gene
- SODe0
- Outcome
- damaging effects on the plant cellse0
- Qualifier
- due to the SOD reduced total activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in spite of increased activities of Mn-SOD and POD, reactive oxygen species (ROS) had damaging effects on the plant cells due to the SOD reduced total activity.”
t0“Potato Plants (Solanum tuberosum L.)”
Claim · model-written summary
Salt sensitive and tolerant cultivars did not differ generally in NaCl response.
- Taxon
- Solanum tuberosum L.Solanum tuberosumt0
- Outcome
- response to NaCl stresse0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, there was no difference between relatively salt sensitive and tolerant cultivars in response to NaCl stress.”
t0“Potato Plants (Solanum tuberosum L.)”
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See all 24 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.