Abstract
In the semi-arid region, the quality of water for irrigation stands out as a limiting factor for the expansion ofagriculture. Thus, it is extremely important to search for alternatives that minimize the effects of salt stress onplants. Foliar application of salicylic acid stands out among these strategies. In this context, the objective ofthis study was to evaluate the gas exchange, photosynthetic pigments, and growth of guava as a function ofirrigation water salinity and exogenous application of salicylic acid in the post-grafting stage. The experimentwas conducted under greenhouse conditions, in a randomized block experimental design, in a 2 × 4 facto rialscheme, corresponding to two levels of electrical conductivity of irrigation water (0.6 and 3.2 dS m-1) and fourconcentrations of salicylic acid (0; 1.2; 2.4 and 3.6 mM), with three replicates. Irrigation with water of 3.2 dS m-1caused reductions in transpiration, CO2 assimilation rate, instantaneous water use efficiency and instantaneouscarboxylation efficiency of guava, at 150 days after transplanting. Water with electrical conductivity of 3.2 dSm-1 reduced the growth in stem diameter and the absolute and relative growth rates, as well as the relativewater content, and chlorophyll a and b contents of guava plants. The interaction between water salinity levelsand salicylic acid concentrations did not influence the physiological indices and growth of guava in the postgraftingphase.
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Claims 6
Claim · model-written summary
Irrigation with 3.2 dS m-1 water reduced transpiration and CO2 assimilation rate of guava at 150 days after transplanting.
- Taxon
- guava
Psidium guajavae1 - Treatment
- Irrigation with water of 3.2 dS m-1e1
- Outcome
- transpiration, CO2 assimilation ratee1
- Direction
- reductionse1
- Qualifier
- at 150 days after transplantinge1
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e1“Irrigation with water of 3.2 dS m-1caused reductions in transpiration, CO2 assimilation rate, instantaneous water use efficiency and instantaneous carboxylation efficiency of guava, at 150 days after transplanting”
Claim · model-written summary
Irrigation with 3.2 dS m-1 water reduced instantaneous water use efficiency and instantaneous carboxylation efficiency of guava at 150 days after transplanting.
- Taxon
- guavaPsidium guajavae1
- Treatment
- Irrigation with water of 3.2 dS m-1e1
- Outcome
- instantaneous water use efficiency and instantaneous carboxylation efficiencye1
- Direction
- reductionse1
- Qualifier
- at 150 days after transplantinge1
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e1“Irrigation with water of 3.2 dS m-1caused reductions in transpiration, CO2 assimilation rate, instantaneous water use efficiency and instantaneous carboxylation efficiency of guava, at 150 days after transplanting”
Claim · model-written summary
Water with 3.2 dS m-1 electrical conductivity reduced stem diameter and absolute and relative growth rates of guava.
- Taxon
- guavaPsidium guajavae2
- Treatment
- Water with electrical conductivity of 3.2 dSm-1e2
- Outcome
- growth in stem diameter and the absolute and relative growth ratese2
- Direction
- reducede2
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e2“Water with electrical conductivity of 3.2 dSm-1 reduced the growth in stem diameter and the absolute and relative growth rates, as well as the relativewater content, and chlorophyll a and b contents of guava plants”
Claim · model-written summary
Water with 3.2 dS m-1 electrical conductivity reduced the relative water content of guava.
- Taxon
- guavaPsidium guajavae2
- Treatment
- Water with electrical conductivity of 3.2 dSm-1e2
- Outcome
- relativewater contente2
- Direction
- reducede2
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e2“Water with electrical conductivity of 3.2 dSm-1 reduced the growth in stem diameter and the absolute and relative growth rates, as well as the relativewater content, and chlorophyll a and b contents of guava plants”
Claim · model-written summary
Water with 3.2 dS m-1 electrical conductivity reduced chlorophyll a and b contents of guava.
- Taxon
- guavaPsidium guajavae2
- Treatment
- Water with electrical conductivity of 3.2 dSm-1e2
- Outcome
- chlorophyll a and b contentse2
- Direction
- reducede2
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e2“Water with electrical conductivity of 3.2 dSm-1 reduced the growth in stem diameter and the absolute and relative growth rates, as well as the relativewater content, and chlorophyll a and b contents of guava plants”
Claim · model-written summary
The interaction between water salinity levels and salicylic acid concentrations did not influence physiological indices and growth of guava.
- Taxon
- guavaPsidium guajavae4
- Treatment
- interaction between water salinity levelsand salicylic acid concentrationse4
- Outcome
- physiological indices and growthe4
- Direction
- did not influencee4
- Setting
- greenhouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conducted under greenhouse conditions”
e4“The interaction between water salinity levelsand salicylic acid concentrations did not influence the physiological indices and growth of guava”
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See all 7 papers →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.