Abstract
The effect in vivo of salt stress on the activated oxygen metabolism of mitochondria, was studied in leaves from two NaCl‐treated cultivars of Pisum sativum L. with different sensitivity to NaCl. In mitochondria from NaCl‐sensitive plants, salinity brought about a significant decrease of Mn‐SOD (EC 1. 15. 1. 1) Cu, Zn‐SOD I (EC 1. 15. 1. 1) and fumarase (EC 4. 2. 1. 2) activities. Conversely, in salt‐tolerant plants NaCl treatment produced an increase in the mitochondrial Mn‐SOD activity and, to a lesser extent, in fumarase activity. In mitochondria from both salt‐treated cultivars, the internal H 2 O 2 concentration remained unchanged. The NADH‐ and succinate‐dependent generation of O 2 .− radicals by submitochondrial particles and the lipid peroxidation of mitochondrial membranes, increased as a result of salt treatment, and these changes were higher in NaCl‐sensitive than in NaCl‐tolerant plants. Accordingly, the enhanced rates of superoxide production by mitochondria from salt‐sensitive plants were concomitant with a strong decrease in the mitochondrial Mn‐SOD activity, whereas NaCl‐tolerant plants appear to have a protection mechanism against salt‐induced increased O 2 .− production by means of the induction of the mitochondrial Mn‐SOD activity. These results indicate that in the subcellular toxicity of NaCl in pea plants, at the level of mitochondria, an oxidative stress mechanism mediated by superoxide radicals is involved, and also imply a function for mitochondrial Mn‐SOD in the molecular mechanisms of plant tolerance to NaCl.
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Claims 12
Claim · model-written summary
In NaCl-sensitive pea plants, salinity significantly decreased mitochondrial Mn-SOD activity.
- Taxon
- Pisum sativum
Lathyrus oleraceuse2 - Material
- NaCl‐sensitive plantse1
- Organ / stage
- mitochondriae1
- Treatment
- salinitye1
- Gene
- Mn‐SODe1
- Outcome
- activitiese1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In mitochondria from NaCl‐sensitive plants, salinity brought about a significant decrease of Mn‐SOD (EC 1. 15. 1. 1) Cu, Zn‐SOD I (EC 1. 15. 1. 1) and fumarase (EC 4. 2. 1. 2) activities”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
In NaCl-sensitive pea plants, salinity significantly decreased mitochondrial Cu, Zn-SOD I activity.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- NaCl‐sensitive plantse1
- Organ / stage
- mitochondriae1
- Treatment
- salinitye1
- Gene
- Cu, Zn‐SOD Ie1
- Outcome
- activitiese1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In mitochondria from NaCl‐sensitive plants, salinity brought about a significant decrease of Mn‐SOD (EC 1. 15. 1. 1) Cu, Zn‐SOD I (EC 1. 15. 1. 1) and fumarase (EC 4. 2. 1. 2) activities”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
In NaCl-sensitive pea plants, salinity significantly decreased mitochondrial fumarase activity.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- NaCl‐sensitive plantse1
- Organ / stage
- mitochondriae1
- Treatment
- salinitye1
- Gene
- fumarasee1
- Outcome
- activitiese1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In mitochondria from NaCl‐sensitive plants, salinity brought about a significant decrease of Mn‐SOD (EC 1. 15. 1. 1) Cu, Zn‐SOD I (EC 1. 15. 1. 1) and fumarase (EC 4. 2. 1. 2) activities”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
NaCl treatment increased mitochondrial Mn-SOD activity in salt-tolerant pea plants.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- salt‐tolerant plantse1
- Organ / stage
- mitochondriale1
- Treatment
- NaCl treatmente1
- Gene
- Mn‐SODe1
- Outcome
- activitye1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Conversely, in salt‐tolerant plants NaCl treatment produced an increase in the mitochondrial Mn‐SOD activity and, to a lesser extent, in fumarase activity”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
NaCl treatment increased fumarase activity to a lesser extent in salt-tolerant pea plants.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- salt‐tolerant plantse1
- Organ / stage
- mitochondriale1
- Treatment
- NaCl treatmente1
- Gene
- fumarasee1
- Outcome
- fumarase activitye1
- Direction
- increasee1
- Qualifier
- to a lesser extente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Conversely, in salt‐tolerant plants NaCl treatment produced an increase in the mitochondrial Mn‐SOD activity and, to a lesser extent, in fumarase activity”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
Internal H2O2 concentration in mitochondria of both salt-treated pea cultivars remained unchanged.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Organ / stage
- mitochondriae1
- Treatment
- salt‐treatede1
- Outcome
- internal H 2 O 2 concentratione1
- Direction
- remained unchangede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In mitochondria from both salt‐treated cultivars, the internal H 2 O 2 concentration remained unchanged”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
Salt treatment increased superoxide (O2.-) radical generation by submitochondrial particles, more in salt-sensitive than salt-tolerant pea plants.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- NaCl‐sensitivee1
- Organ / stage
- submitochondrial particlese1
- Treatment
- salt treatmente1
- Outcome
- generation of O 2 .− radicalse1
- Direction
- increasede1
- Qualifier
- higher in NaCl‐sensitive than in NaCl‐tolerant plantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The NADH‐ and succinate‐dependent generation of O 2 .− radicals by submitochondrial particles and the lipid peroxidation of mitochondrial membranes, increased as a result of salt treatment, and these changes were higher in NaCl‐sensitive than in NaCl‐tolerant plants”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
Salt treatment increased lipid peroxidation of mitochondrial membranes, more in salt-sensitive than salt-tolerant pea plants.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- NaCl‐sensitivee1
- Organ / stage
- mitochondrial membranese1
- Treatment
- salt treatmente1
- Outcome
- lipid peroxidatione1
- Direction
- increasede1
- Qualifier
- higher in NaCl‐sensitive than in NaCl‐tolerant plantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The NADH‐ and succinate‐dependent generation of O 2 .− radicals by submitochondrial particles and the lipid peroxidation of mitochondrial membranes, increased as a result of salt treatment, and these changes were higher in NaCl‐sensitive than in NaCl‐tolerant plants”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
Superoxide production was concomitant with a strong decrease in mitochondrial Mn-SOD activity in salt-sensitive pea plants.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- salt‐sensitive plantse1
- Organ / stage
- mitochondriale1
- Gene
- Mn‐SODe1
- Outcome
- Mn‐SOD activitye1
- Direction
- decreasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the enhanced rates of superoxide production by mitochondria from salt‐sensitive plants were concomitant with a strong decrease in the mitochondrial Mn‐SOD activity”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
Salt-tolerant pea plants appear to have a protection mechanism against salt-induced superoxide production, based on induction of mitochondrial Mn-SOD activity.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Material
- NaCl‐tolerant plantse1
- Organ / stage
- mitochondriale1
- Gene
- Mn‐SODe1
- Outcome
- increased O 2 .− productione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“whereas NaCl‐tolerant plants appear to have a protection mechanism against salt‐induced increased O 2 .− production by means of the induction of the mitochondrial Mn‐SOD activity”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
Claim · model-written summary
An oxidative stress mechanism mediated by superoxide radicals is involved in the subcellular toxicity of NaCl in pea mitochondria.
- Taxon
- peaLathyrus oleraceuse1
- Organ / stage
- mitochondriae1
- Treatment
- NaCle1
- Compound
- superoxide radicalse1
- Outcome
- subcellular toxicity of NaCle1
- Qualifier
- an oxidative stress mechanism mediated by superoxide radicalse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“These results indicate that in the subcellular toxicity of NaCl in pea plants, at the level of mitochondria, an oxidative stress mechanism mediated by superoxide radicals is involved”
Claim · model-written summary
Mitochondrial Mn-SOD may have a function in the molecular mechanisms of pea plant tolerance to NaCl.
- Taxon
- Pisum sativumLathyrus oleraceuse2
- Treatment
- NaCle1
- Gene
- Mn‐SODe1
- Outcome
- plant tolerance to NaCle1
- Qualifier
- molecular mechanismse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“imply a function for mitochondrial Mn‐SOD in the molecular mechanisms of plant tolerance to NaCl”
e2“leaves from two NaCl‐treated cultivars of Pisum sativum L”
The same questions in other papers
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salinity · physiology: oxidative · Lathyrus oleraceus (pea)Results differ
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13 papers in the same direction as this paper · 1 in the opposite direction
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See all 15 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.