Abstract
ABSTRACT Fruit growing is an activity of great relevance for agribusiness in Brazil, with emphasis on guava. However, water deficiency is one of the limiting factors for plant productivity, so the use of phytohormones such as salicylic acid has been employed as a strategy to mitigate the effects of water deficit. The objective of this study was to evaluate the foliar application of salicylic acid as an attenuator of water deficit in guava genetic materials. The experimental design adopted was randomized blocks, in a 2 × 2 × 5 factorial scheme, considering two water regimes (irrigation depths equivalent to 50 and 100% of the reference evapotranspiration - ETr), two guava genetic materials (‘Crioula’ and ‘Paluma’) and five concentrations of salicylic acid (0, 1.2, 2.4, 3.6, and 4.8 mM). Foliar application of salicylic acid at a concentration of 2.4 mM promoted growth, gas exchange, and chlorophyll a fluorescence of ‘Crioula’ guava under irrigation with 50% ETr. Water deficit reduced growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescence of guava. Among the genetic materials, greater growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescence was observed in ‘Paluma’ compared to ‘Crioula’ under irrigation with 50% ETr without foliar application of salicylic acid. Foliar application of salicylic acid at a concentration of 1.2 mM increases leaf area, number of leaves, and total dry mass in the ‘Crioula’ genetic material under 50% ETr.
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Claims 4
Claim · model-written summary
At 2.4 mM, foliar salicylic acid promoted growth, gas exchange and chlorophyll a fluorescence of Crioula guava at 50% ETr.
- Taxon
- guava
Psidium guajavae0 - Material
- ‘Crioula’e0
- Treatment
- Foliar application of salicylic acid at a concentration of 2.4 mMe0
- Outcome
- growth, gas exchange, and chlorophyll a fluorescencee0
- Direction
- promotede0
- Qualifier
- 50% ETre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of salicylic acid at a concentration of 2.4 mM promoted growth, gas exchange, and chlorophyll a fluorescence of ‘Crioula’ guava under irrigation with 50% ETr”
Claim · model-written summary
Water deficit reduced guava growth, gas exchange, chlorophyll contents and chlorophyll a fluorescence.
- Taxon
- guavaPsidium guajavae0
- Treatment
- Water deficite0
- Outcome
- growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit reduced growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescence of guava”
Claim · model-written summary
Paluma had greater growth, gas exchange, chlorophyll contents and chlorophyll a fluorescence than Crioula at 50% ETr without salicylic acid.
- Taxon
- guavaPsidium guajavat0
- Material
- ‘Paluma’e0
- Outcome
- growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescencee0
- Direction
- greatere0
- Qualifier
- 50% ETr without foliar application of salicylic acide0
- Comparator
- ‘Crioula’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater growth, gas exchange, chlorophyll contents, and chlorophyll a fluorescence was observed in ‘Paluma’ compared to ‘Crioula’ under irrigation with 50% ETr without foliar application of salicylic acid”
t0“guava”
Claim · model-written summary
At 1.2 mM, foliar salicylic acid increased leaf area, leaf number and total dry mass in Crioula at 50% ETr.
- Taxon
- guavaPsidium guajavat0
- Material
- ‘Crioula’e0
- Treatment
- Foliar application of salicylic acid at a concentration of 1.2 mMe0
- Outcome
- leaf area, number of leaves, and total dry masse0
- Direction
- increasese0
- Qualifier
- 50% ETre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of salicylic acid at a concentration of 1.2 mM increases leaf area, number of leaves, and total dry mass in the ‘Crioula’ genetic material under 50% ETr”
t0“guava”
The same questions in other papers
salicylic acid · growth · Psidium guajava (guava)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
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See all 6 papers →salicylic acid · physiology: gas exchange · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
application · growth · Psidium guajava (guava)Positive and negative results
27 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
25 papers more in this group
See all 29 papers →application · physiology: gas exchange · Psidium guajava (guava)Results agree
1 paper in the same direction as this paper
- positive
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.