Abstract
The present study aimed to evaluate concentrations and forms of application of salicylic acid used for water stress mitigation on the gas exchange and growth of yellow passion fruit. The experimental design was arranged in randomized blocks in a 4 × 4 × 2 factorial scheme, with four concentrations of salicylic acid (SA) via foliar application (0.0, 0.7, 1.4, and 2.1 mM), four SA concentrations via fertigation (0.0, 0.7, 1.4, and 2.1 mM), and two irrigation depths estimated based on the actual evapotranspiration - ETr (50 and 100% of ETr), with three replications. Water stress negatively affected the physiology and growth of yellow passion fruit seedlings at 75 days after sowing (DAS). The application of salicylic acid, regardless of the form of application, attenuates the effects of water stress on gas exchange and growth of yellow passion fruit, with the best results obtained when applying a concentration of 1.30 mM via leaf or 0.90 mM via fertirrigation. The combination of foliar application of AS and fertigation contributed to improve photosynthetic and growth parameters under water conditions of 50 and 100% of ETr. The foliar application of AS presents superior responses to the application via fertigation. These results reinforce the hypothesis that the attenuation of water stress by salicylic acid is related to the maintenance of gas exchange, which depends on the concentration and form of application, and studies testing combinations throughout the crop cycle become promising for advances in knowledge from the action of this phytohormone on abiotic stress.
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Claims 7
Claim · model-written summary
Water stress adversely affected seedling physiology and growth at 75 days after sowing.
- Taxon
- yellow passion fruite0
- Organ / stage
- seedlingse0
- Treatment
- Water stresse0
- Outcome
- physiology and growthe0
- Direction
- negatively affectede0
- Qualifier
- at 75 days after sowing (DAS)e0
Not reportedComparator
Verbatim
e0“Water stress negatively affected the physiology and growth of yellow passion fruit seedlings at 75 days after sowing (DAS).”
Claim · model-written summary
Salicylic acid application attenuated water stress effects on gas exchange and growth.
- Taxon
- yellow passion fruite0
- Treatment
- application of salicylic acide0
- Outcome
- gas exchange and growthe0
- Direction
- attenuatese0
Not reportedComparator
Verbatim
e0“The application of salicylic acid, regardless of the form of application, attenuates the effects of water stress on gas exchange and growth of yellow passion fruit”
Claim · model-written summary
Foliar 1.30 mM salicylic acid gave the best reported results.
Verbatim
e0“the best results obtained when applying a concentration of 1.30 mM via leaf or 0.90 mM via fertirrigation”
e1“gas exchange and growth of yellow passion fruit, with the best results”
Claim · model-written summary
Fertirrigation at 0.90 mM salicylic acid gave the best reported results.
Verbatim
e0“the best results obtained when applying a concentration of 1.30 mM via leaf or 0.90 mM via fertirrigation”
e1“gas exchange and growth of yellow passion fruit, with the best results”
Claim · model-written summary
Combined foliar and fertigation application improved photosynthetic and growth parameters at both irrigation depths.
- Taxon
- sour passion fruitt0
- Treatment
- combination of foliar application of AS and fertigatione0
- Outcome
- photosynthetic and growth parameterse0
- Direction
- improvee0
- Qualifier
- under water conditions of 50 and 100% of ETre0
Not reportedComparator
Verbatim
e0“The combination of foliar application of AS and fertigation contributed to improve photosynthetic and growth parameters under water conditions of 50 and 100% of ETr.”
t0“sour passion fruit seedlings”
Claim · model-written summary
Foliar application produced superior responses to fertigation.
Verbatim
e0“The foliar application of AS presents superior responses to the application via fertigation.”
t0“sour passion fruit seedlings”
Claim · model-written summary
The authors hypothesize that maintained gas exchange relates to salicylic acid attenuation of water stress.
Verbatim
e0“the attenuation of water stress by salicylic acid is related to the maintenance of gas exchange, which depends on the concentration and form of application”
t0“sour passion fruit seedlings”
The same questions in other papers
drought · growth · Passiflora edulis (passion fruit)Results agree
3 papers in the same direction as this paper
- no effect
- negative
- negative
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.