Abstract
Salicylic acid (SA) is an important plant regulator reported as a mitigator of water deficit in plants, however without a recommendation for use in field conditions. Thus, this research aims to validate the use of SA under field conditions in regions with low water availability. For that, we evaluated CO2 assimilation (A), stomatal conductance (gs), transpiration (E), water use efficiency (WUE), and carboxylation efficiency (A/Ci) at 15, 30, and 45 days of continuous stress water deficit, as well as the application of salicylic acid (0.0; 0.5; 1.0; 1.5; 2.0 mM) in tomato plants subjected to continuous water deficit (45 days), in two years (2019 and 2020). The water deficit reduced the A, gs, E and A/Ci, while the foliar application of SA increased these parameters in all evaluated times, resulting in similar or even higher values than in plants without water deficit. Water deficit caused floral abortion in tomato plants, without the application of SA, reducing the number of fruit production. In contrast, plants that received about 1.3 mM of SA increased A and A/Ci and translocated the photo-assimilates, mainly to flowers and fruits, reducing floral abortion and increasing fruit production. Thus, foliar application of SA was efficient in mitigating the deleterious effects of water deficit in tomato plants regarding the gas exchange and fruit production.
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Claims 9
Claim · model-written summary
Water deficit reduced CO2 assimilation, stomatal conductance and transpiration.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- water deficite0
- Outcome
- A, gs, Ee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“The water deficit reduced the A, gs, E and A/Ci”
Claim · model-written summary
Water deficit reduced carboxylation efficiency.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- water deficite0
- Outcome
- A/Cie0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“The water deficit reduced the A, gs, E and A/Ci”
Claim · model-written summary
Foliar salicylic acid increased assimilation, conductance and transpiration under water deficit at all evaluated times.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- foliar application of SAe0
- Outcome
- these parameterse0
- Direction
- increasede0
- Qualifier
- in all evaluated timese0
- Comparator
- plants without water deficite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“the foliar application of SA increased these parameters in all evaluated times, resulting in similar or even higher values than in plants without water deficit”
Claim · model-written summary
Water deficit without salicylic acid caused floral abortion.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Water deficite0
- Outcome
- floral abortione0
- Comparator
- without the application of SAe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Water deficit caused floral abortion in tomato plants, without the application of SA”
Claim · model-written summary
Water deficit without salicylic acid reduced fruit production.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Water deficite0
- Outcome
- number of fruit productione0
- Direction
- reducinge0
- Comparator
- without the application of SAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Water deficit caused floral abortion in tomato plants, without the application of SA, reducing the number of fruit production”
Claim · model-written summary
About 1.3 mM salicylic acid increased assimilation and carboxylation efficiency under water deficit.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- about 1.3 mM of SAe0
- Outcome
- A and A/Cie0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“plants that received about 1.3 mM of SA increased A and A/Ci”
Claim · model-written summary
About 1.3 mM salicylic acid reduced floral abortion under water deficit.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- about 1.3 mM of SAe0
- Outcome
- floral abortione0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“plants that received about 1.3 mM of SA increased A and A/Ci and translocated the photo-assimilates, mainly to flowers and fruits, reducing floral abortion and increasing fruit production”
Claim · model-written summary
About 1.3 mM salicylic acid increased fruit production under water deficit.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- about 1.3 mM of SAe0
- Outcome
- fruit productione0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“plants that received about 1.3 mM of SA increased A and A/Ci and translocated the photo-assimilates, mainly to flowers and fruits, reducing floral abortion and increasing fruit production”
Claim · model-written summary
About 1.3 mM salicylic acid directed photo-assimilates mainly to flowers and fruits.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- flowers and fruitse0
- Treatment
- about 1.3 mM of SAe0
- Outcome
- translocated the photo-assimilatese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“plants that received about 1.3 mM of SA increased A and A/Ci and translocated the photo-assimilates, mainly to flowers and fruits”
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