Abstract
Abstract The influence of silicon (Si) (2.5 mM), sodium chloride (NaCl) (100 mM), and Si (2.5 mM) + NaCl (97.5 mM) supply on chlorophyll content, chlorophyll fluorescence, the concentration of malondialdehyde (MDA), H2O2 level, and activities of superoxide dismutase (SOD; E.C.1.15.1.1.), ascorbate peroxidase (APx; E.C.1.11.1.11.), catalase (CAT; E.C.1.11.1.6.), guaiacol peroxidase (G-POD; E.C.1.11.1.7.) enzymes, and protein content were studied in tomato (Lycopersicon esculentum Mill c.v.) leaves over 10-day and 27-day periods. The results indicated that silicon partially offset the negative impacts of NaCl stress with increased the tolerance of tomato plants to NaCl salinity by raising SOD and CAT activities, chlorophyll content, and photochemical efficiency of PSII. Salt stress decreased SOD and CAT activities and soluble protein content in the leaves. However, addition of silicon to the nutrient solution enhanced SOD and CAT activities and protein content in tomato leaves under salt stress. In contrast, salt stress slightly promoted APx activity and considerably increased H2O2 level and MDA concentration and Si addition slightly decreased APx activity and significantly reduced H2O2 level and MDA concentration in the leaves of salt-treated plants. G-POD activity was slightly decreased by addition of salt and Si. Enhanced activities of SOD and CAT by Si addition may protect the plant tissues from oxidative damage induced by salt, thus mitigating salt toxicity and improving the growth of tomato plants. These results confirm that the scavenging system forms the primary defense line in protecting oxidative damage under stress in crop plants.
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Claims 10
Claim · model-written summary
Silicon increased tomato salt tolerance, SOD and CAT activities, chlorophyll content, and PSII photochemical efficiency under NaCl stress.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- silicone0
- Outcome
- tolerance of tomato plants to NaCl salinitye0
- Direction
- increasede0
- Comparator
- NaCl stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silicon partially offset the negative impacts of NaCl stress with increased the tolerance of tomato plants to NaCl salinity by raising SOD and CAT activities, chlorophyll content, and photochemical efficiency of PSII.”
Claim · model-written summary
Salt stress decreased SOD and CAT activities and soluble protein content in tomato leaves.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Salt stresse0
- Outcome
- SOD and CAT activities and soluble protein contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress decreased SOD and CAT activities and soluble protein content in the leaves.”
t0“Tomato Plants”
Claim · model-written summary
Silicon enhanced SOD and CAT activities and protein content in salt-stressed tomato leaves.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- addition of silicone0
- Outcome
- SOD and CAT activities and protein contente0
- Direction
- enhancede0
- Comparator
- salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of silicon to the nutrient solution enhanced SOD and CAT activities and protein content in tomato leaves under salt stress.”
Claim · model-written summary
Salt stress slightly increased APx activity in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- salt stresse0
- Outcome
- APx activitye0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress slightly promoted APx activity”
t0“Tomato Plants”
Claim · model-written summary
Salt stress considerably increased H2O2 level and MDA concentration in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- salt stresse0
- Outcome
- H2O2 level and MDA concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress slightly promoted APx activity and considerably increased H2O2 level and MDA concentration”
t0“Tomato Plants”
Claim · model-written summary
Silicon slightly decreased APx activity in salt-treated tomato leaves.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si additione0
- Outcome
- APx activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si addition slightly decreased APx activity”
t0“Tomato Plants”
Claim · model-written summary
Silicon significantly reduced H2O2 level and MDA concentration in salt-treated tomato leaves.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Si additione0
- Outcome
- H2O2 level and MDA concentratione0
- Direction
- reducede0
- Comparator
- salt-treated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si addition slightly decreased APx activity and significantly reduced H2O2 level and MDA concentration in the leaves of salt-treated plants.”
t0“Tomato Plants”
Claim · model-written summary
Salt addition slightly decreased G-POD activity in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- addition of salte0
- Outcome
- G-POD activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“G-POD activity was slightly decreased by addition of salt and Si.”
t0“Tomato Plants”
Claim · model-written summary
Silicon addition slightly decreased G-POD activity in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Sie0
- Outcome
- G-POD activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“G-POD activity was slightly decreased by addition of salt and Si.”
t0“Tomato Plants”
Claim · model-written summary
The authors proposed that silicon-enhanced SOD and CAT protect tomato tissues from salt-induced oxidative damage and improve growth.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Si additione0
- Gene
- SOD and CATe0
- Outcome
- improving the growth of tomato plantse0
- Qualifier
- may protect the plant tissues from oxidative damage induced by salte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhanced activities of SOD and CAT by Si addition may protect the plant tissues from oxidative damage induced by salt, thus mitigating salt toxicity and improving the growth of tomato plants.”
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See all 63 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.