Abstract
BACKGROUND: The aim of this study is to compare the tolerance mechanisms of two industrial tomato varieties (X5671R and 5MX12956) under drought stress. 14 days-old tomato seedlings were subjected to 7 days-long drought stress by withholding irrigation. The effects of stress were determined by enzymatic and non-enzymatic parameters. The physiological damages were evaluated via lipid peroxidation ratio, total protein content, relative water content, chlorophyll content and proline accumulation. Enzymatic responses were determined by biochemical analysis and electrophoresis of SOD, APX, POX and CAT enzymes. RESULTS: Relative water contents of X5671R and 5MX12956 varieties at 7th day of drought were decreased to 8.4 and 12.2%, respectively. Applied drought decreased all photosynthetic pigments of X5671R and 5MX12956 varieties during the treatment period significantly comparing to the Day 0 as the control. Total protein content, lipid peroxidation and proline accumulation presented increased values in both varieties in accordance with the increasing stress intensity. According to lipid peroxidation analysis, 5MX12956 tomato variety was found more drought sensitive than X5671R variety. Antioxidative enzyme activities showed increases in both varieties as a response to drought stress, although CAT and APX activities presented decrease on the 7th day of applied stress. 7 days long drought stress differentially altered POX, APX and SOD isozyme patterns. Same POX bands were observed in both varieties with different band intensities. CONCLUSIONS: However, main isozyme pattern differences were obtained for SOD and APX. APX1, Fe-SOD and Cu/Zn-SOD2 isozyme bands should be evaluated to define their main role in the tolerance mechanism of both tomato varieties.
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Claims 13
Claim · model-written summary
Relative water content of X5671R decreased to 8.4% on day seven.
- Taxon
- tomato
Solanum lycopersicumt0 - Material
- X5671Re0
- Treatment
- droughte0
- Outcome
- Relative water contentse0
- Direction
- decreasede0
- Value
- 8.4e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative water contents of X5671R and 5MX12956 varieties at 7th day of drought were decreased to 8.4 and 12.2%, respectively.”
t0“tomato”
Claim · model-written summary
Relative water content of 5MX12956 decreased to 12.2% on day seven.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 5MX12956e0
- Treatment
- droughte0
- Outcome
- Relative water contentse0
- Direction
- decreasede0
- Value
- 12.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative water contents of X5671R and 5MX12956 varieties at 7th day of drought were decreased to 8.4 and 12.2%, respectively.”
t0“tomato”
Claim · model-written summary
Drought significantly decreased all photosynthetic pigments in X5671R relative to day zero.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- X5671Re0
- Treatment
- droughte0
- Outcome
- all photosynthetic pigmentse0
- Direction
- decreasede0
- Comparator
- Day 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applied drought decreased all photosynthetic pigments of X5671R and 5MX12956 varieties during the treatment period significantly comparing to the Day 0 as the control.”
t0“tomato”
Claim · model-written summary
Drought significantly decreased all photosynthetic pigments in 5MX12956 relative to day zero.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- 5MX12956e0
- Treatment
- droughte0
- Outcome
- all photosynthetic pigmentse0
- Direction
- decreasede0
- Comparator
- Day 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applied drought decreased all photosynthetic pigments of X5671R and 5MX12956 varieties during the treatment period significantly comparing to the Day 0 as the control.”
t0“tomato”
Claim · model-written summary
Protein content, lipid peroxidation and proline accumulation increased with stress intensity in both varieties.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- stress intensitye0
- Outcome
- Total protein content, lipid peroxidation and proline accumulatione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total protein content, lipid peroxidation and proline accumulation presented increased values in both varieties in accordance with the increasing stress intensity.”
t0“tomato”
Claim · model-written summary
Lipid peroxidation indicated greater drought sensitivity in 5MX12956 than X5671R.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- 5MX12956e0
- Outcome
- drought sensitivee0
- Direction
- moree0
- Comparator
- X5671Re0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“According to lipid peroxidation analysis, 5MX12956 tomato variety was found more drought sensitive than X5671R variety.”
Claim · model-written summary
Antioxidative enzyme activities increased in both varieties under drought.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- drought stresse0
- Outcome
- Antioxidative enzyme activitiese0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Antioxidative enzyme activities showed increases in both varieties as a response to drought stress”
t0“tomato”
Claim · model-written summary
CAT activity decreased on the seventh day of drought.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- applied stresse0
- Gene
- CATe0
- Outcome
- CAT and APX activitiese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CAT and APX activities presented decrease on the 7th day of applied stress.”
t0“tomato”
Claim · model-written summary
APX activity decreased on the seventh day of drought.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- applied stresse0
- Gene
- APXe0
- Outcome
- APX activitiese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CAT and APX activities presented decrease on the 7th day of applied stress.”
t0“tomato”
Claim · model-written summary
Drought altered POX, APX and SOD isozyme patterns differently.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- 7 days long drought stresse0
- Outcome
- POX, APX and SOD isozyme patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“7 days long drought stress differentially altered POX, APX and SOD isozyme patterns.”
t0“tomato”
Claim · model-written summary
Both varieties had the same POX bands with different intensities.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Same POX bandse0
- Qualifier
- different band intensitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Same POX bands were observed in both varieties with different band intensities.”
t0“tomato”
Claim · model-written summary
The main isozyme pattern differences were for SOD and APX.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- SOD and APXe0
- Outcome
- isozyme pattern differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“main isozyme pattern differences were obtained for SOD and APX.”
t0“tomato”
Claim · model-written summary
The authors recommend evaluating APX1, Fe-SOD and Cu/Zn-SOD2 bands for roles in drought tolerance.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- APX1, Fe-SOD and Cu/Zn-SOD2 isozyme bands should be evaluatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APX1, Fe-SOD and Cu/Zn-SOD2 isozyme bands should be evaluated to define their main role in the tolerance mechanism of both tomato varieties.”
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