Abstract
The beneficial effects of silicon (Si) on plants have been widely reported for its fruit qualitative improvements, growth gains, and protection against abiotic and biotic stresses. This study aimed to evaluate the combined effect of soil water potential (Ψs) (−30 and −60 kPa) and the foliar application of Si (0.0 (control), 1.0, 2.0, 3.0, and 4.0 g L−1) in the development of tomatoes grown in a greenhouse. We evaluated the biometric parameters and gas exchange in three periods (20, 34, and 48 days after planting). The rates of transpiration (E), stomatal conductance (gs), and net photosynthesis assimilation (An) were lower when the plants were subjected to water deficit. The foliar application of Si attenuated the effect of the water deficit in both levels applied to the crop. A high response was observed at −60 kPa, regardless of the evaluated period. However, a significant effect was not observed on the relative chlorophyll index and biomass accumulation when Si was applied. A foliar application up to 2.8 g L−1 promotes increases in An,gs, and E. It is highlighted that Si can promote improvements in gas exchange when plants are affected by a water deficit.
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Claims 6
Claim · model-written summary
Water deficit lowered tomato transpiration, stomatal conductance and net photosynthesis.
- Taxon
- Tomatoes
Solanum lycopersicumt0 - Treatment
- water deficite0
- Outcome
- transpiration (E), stomatal conductance (gs), and net photosynthesis assimilation (An)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rates of transpiration (E), stomatal conductance (gs), and net photosynthesis assimilation (An) were lower when the plants were subjected to water deficit.”
t0“Tomatoes”
Claim · model-written summary
Foliar silicon attenuated water-deficit effects at both applied deficit levels.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- foliar application of Sie0
- Outcome
- effect of the water deficite0
- Direction
- attenuatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The foliar application of Si attenuated the effect of the water deficit in both levels applied to the crop.”
t0“Tomatoes”
Claim · model-written summary
The response at −60 kPa was high regardless of evaluation period.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- −60 kPae0
- Outcome
- high responsee0
- Qualifier
- regardless of the evaluated periode0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high response was observed at −60 kPa, regardless of the evaluated period.”
t0“Tomatoes”
Claim · model-written summary
Silicon had no significant effect on the relative chlorophyll index.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Sie0
- Outcome
- relative chlorophyll indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant effect was not observed on the relative chlorophyll index and biomass accumulation when Si was applied.”
t0“Tomatoes”
Claim · model-written summary
Silicon had no significant effect on biomass accumulation.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Sie0
- Outcome
- biomass accumulatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant effect was not observed on the relative chlorophyll index and biomass accumulation when Si was applied.”
t0“Tomatoes”
Claim · model-written summary
Foliar silicon up to 2.8 g L−1 increased net photosynthesis, stomatal conductance and transpiration.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- foliar application up to 2.8 g L−1e0
- Outcome
- An,gs, and Ee0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A foliar application up to 2.8 g L−1 promotes increases in An,gs, and E.”
t0“Tomatoes”
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