Abstract
The present work reveals the beneficial role of sodium nitroprusside (SNP; NO donor concentration: 50 and 100 µM) in mitigation of water stress accompanied by a reduction in viral disease incidence in tomato plants subjected to deficit irrigation. The plants were grown under two irrigation regimes: well-watered (WW; irrigated after the depletion of 55–60% of available soil water) and water deficit (WD; irrigated after the depletion of 85–90% of available soil water) in two seasons of 2018 and 2019. The results indicated that under water stress conditions, plant growth, chlorophyll, relative water content (RWC), and fruit yield were decreased. Conversely, water stress significantly increased the MDA, proline, soluble sugars, and antioxidant enzymes’ activities. Moreover, it was obvious a negligible increase in the fruit content from NO2 and NO3. Water-deficit stress, however, had a positive impact on reducing the percentage of viral disease (TMV and TYLCV) incidence on tomato plants. Similarly, SNP application in the form of foliar spray significantly reduced the disease incidence, the severity, and the relative concentrations of TMV and TYLCV in tomato plants raised under both WW and WD conditions. The treatment of SNP at 100 µM achieved better results and could be recommended to induce tomato plant tolerance to water stress. Thus, the present work highlights the role of NO (SNP) in the alleviation of water stress in tomato plants and subsequent reduction in viral disease incidence during deficit irrigation.
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Claims 9
Claim · model-written summary
Water stress reduced tomato growth, chlorophyll, water content and fruit yield.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- water stresse0
- Outcome
- plant growth, chlorophyll, relative water content (RWC)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“under water stress conditions, plant growth, chlorophyll, relative water content (RWC), and fruit yield were decreased.”
Claim · model-written summary
Water stress reduced tomato fruit yield.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- water stresse0
- Outcome
- fruit yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“under water stress conditions, plant growth, chlorophyll, relative water content (RWC), and fruit yield were decreased.”
Claim · model-written summary
Water stress increased MDA, proline and soluble sugars.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- water stresse0
- Outcome
- MDA, proline, soluble sugarse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“water stress significantly increased the MDA, proline, soluble sugars, and antioxidant enzymes’ activities.”
Claim · model-written summary
Water stress increased antioxidant enzyme activities.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- water stresse0
- Outcome
- antioxidant enzymes’ activitiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“water stress significantly increased the MDA, proline, soluble sugars, and antioxidant enzymes’ activities.”
Claim · model-written summary
Fruit NO2 and NO3 content increased negligibly.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Outcome
- fruit content from NO2 and NO3e0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“a negligible increase in the fruit content from NO2 and NO3.”
Claim · model-written summary
Water deficit reduced viral disease incidence.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- Water-deficit stresse0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Second interactor
- TYLCVTomato yellow leaf curl viruse0pathogen
- Outcome
- viral disease (TMV and TYLCV) incidencee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.


Verbatim
t0“Tomato Plants”
e0“Water-deficit stress, however, had a positive impact on reducing the percentage of viral disease (TMV and TYLCV) incidence on tomato plants.”
Claim · model-written summary
SNP spray reduced incidence and severity of TMV and TYLCV disease under both irrigation regimes.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- SNP application in the form of foliar spraye0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Second interactor
- TYLCVTomato yellow leaf curl viruse0pathogen
- Outcome
- disease incidence, the severitye0
- Direction
- reducede0
- Qualifier
- under both WW and WD conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.


Verbatim
t0“Tomato Plants”
e0“SNP application in the form of foliar spray significantly reduced the disease incidence, the severity, and the relative concentrations of TMV and TYLCV in tomato plants raised under both WW and WD conditions.”
Claim · model-written summary
SNP spray reduced relative TMV and TYLCV concentrations under both irrigation regimes.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- SNP application in the form of foliar spraye0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Second interactor
- TYLCVTomato yellow leaf curl viruse0pathogen
- Outcome
- relative concentrations of TMV and TYLCVe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.


Verbatim
t0“Tomato Plants”
e0“SNP application in the form of foliar spray significantly reduced the disease incidence, the severity, and the relative concentrations of TMV and TYLCV in tomato plants raised under both WW and WD conditions.”
Claim · model-written summary
The authors recommend 100 µM SNP to induce tomato tolerance to water stress.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Treatment
- SNP at 100 µMe0
- Outcome
- induce tomato plant tolerance to water stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“Tomato Plants”
e0“The treatment of SNP at 100 µM achieved better results and could be recommended to induce tomato plant tolerance to water stress.”
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