Abstract
Summary The effect of long‐term (30 days) NaCl treatments (100 mM and 200 mM) on the activity of some antioxidant enzymes, level of antioxidant metabolites, water relations and chloroplast ultrastructure, was studied in potato (Solanum tuberosum cv. Désirée) leaves. Salt stress negatively affected relative water content, leaf stomatal conductance and transpiration rate. In treated plants, proline was enhanced, but there was a significant decrease in ascorbate and proteins. Total superoxide dismutase activity was increased. The isozyme patterns detected in native gels from salt‐irrigated plants were not changed although all the isoforms appeared more heavily stained due to higher activity. In contrast, at both levels of NaCl, catalase activity decreased and ascorbate peroxidase activity showed no significant change in comparison with an untreated control. At ultrastructural level, only thylakoid swelling and a decrease in the amount of grana stacking was observed in treated plants. The overall behaviour of the antioxidant enzymes suggests an increase of cellular H 2 O 2 that would contribute to the oxidative stress of potato plants, but which may be alleviated somewhat by the enhanced levels of proline.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Salt stress reduced relative water content, stomatal conductance and transpiration.
- Treatment
- Salt stresse0
- Outcome
- relative water content, leaf stomatal conductance and transpiration ratee0
- Direction
- negatively affectede0
Not reportedTaxonComparator
Verbatim
e0“Salt stress negatively affected relative water content, leaf stomatal conductance and transpiration rate”
Claim · model-written summary
Proline increased in treated plants.
Not reportedTaxonComparator
Verbatim
e0“In treated plants, proline was enhanced”
Claim · model-written summary
Ascorbate and proteins decreased significantly in treated plants.
Not reportedTaxonTreatmentComparator
Verbatim
e0“there was a significant decrease in ascorbate and proteins”
Claim · model-written summary
Total superoxide dismutase activity increased.
Not reportedTaxonTreatmentComparator
Verbatim
e0“Total superoxide dismutase activity was increased”
Claim · model-written summary
Salt irrigation did not change antioxidant isozyme patterns.
Not reportedTaxonComparator
Verbatim
e0“The isozyme patterns detected in native gels from salt‐irrigated plants were not changed”
Claim · model-written summary
All isoforms stained more heavily because of higher activity.
Not reportedTaxon
Verbatim
e0“all the isoforms appeared more heavily stained due to higher activity”
Claim · model-written summary
Catalase activity decreased at both NaCl levels.
Not reportedTaxonComparator
Verbatim
e0“at both levels of NaCl, catalase activity decreased”
Claim · model-written summary
Ascorbate peroxidase activity showed no significant change against untreated control.
Not reportedTaxonTreatment
Verbatim
e0“ascorbate peroxidase activity showed no significant change in comparison with an untreated control”
Claim · model-written summary
Treated plants showed thylakoid swelling.
Not reportedTaxonComparatorDirection
Verbatim
e0“only thylakoid swelling and a decrease in the amount of grana stacking was observed in treated plants”
Claim · model-written summary
Grana stacking decreased in treated plants.
Not reportedTaxonComparator
Verbatim
e0“a decrease in the amount of grana stacking was observed in treated plants”
Claim · model-written summary
Antioxidant enzyme behavior suggests increased cellular hydrogen peroxide.
- Taxon
- potato plants
Solanum tuberosume0 - Outcome
- cellular H 2 O 2e0
- Direction
- increasee0
- Qualifier
- overall behaviour of the antioxidant enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The overall behaviour of the antioxidant enzymes suggests an increase of cellular H 2 O 2 that would contribute to the oxidative stress of potato plants”
Claim · model-written summary
Enhanced proline may alleviate oxidative stress.
- Taxon
- potato plantsSolanum tuberosume0
- Compound
- prolinee0
- Outcome
- oxidative stresse0
- Direction
- alleviatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oxidative stress of potato plants, but which may be alleviated somewhat by the enhanced levels of proline”
The same questions in other papers
sodium chloride · physiology: antioxidant enzymes · Solanum tuberosum (potato)Results differ
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →salinity · physiology: gas exchange · Solanum tuberosum (potato)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.