Abstract
ABSTRACT The objective of this study was to evaluate the gas exchange, chloroplast pigments and growth of ‘BRS Rubi do Cerrado’ passion fruit as a function of irrigation with saline water and potassium fertilization in the seedling formation stage. The experiment was conducted under greenhouse conditions in the municipality of Pombal-PB, Brazil. A randomized block design was used in 5 x 2 factorial scheme, corresponding to five levels of water electrical conductivity - ECw (0.3, 1.1, 1.9, 2.7 and 3.5 dS m-1) and two doses of potassium - KD (50 and 100% of the recommendation), with four replicates and two plants per plot. Water salinity from 0.3 dS m-1 reduced the stomatal opening, transpiration, CO2 assimilation and inhibited the growth of ‘BRS Rubi do Cerrado’ passion fruit plants, at 40 days after sowing. There was no CO2 restriction in the substomatal cavity of passion fruit plants grown under water salinity from 0.3 dS m-1. Potassium dose of 150 mg kg-1 of soil, corresponding to 100%, intensified the effect of salt stress on the assimilation rate and instantaneous carboxylation efficiency in 'BRS Rubi do Cerrado' passion fruit. There was interaction between water salinity levels and potassium doses for the chlorophyll a and b contents of 'BRS Rubi do Cerrado' passion fruit.
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Claims 8
Claim · model-written summary
Water salinity reduced stomatal opening in passion fruit at 40 days.
Not reportedTaxonComparator
Verbatim
e0“Water salinity from 0.3 dS m-1 reduced the stomatal opening”
Claim · model-written summary
Water salinity reduced transpiration.
Not reportedTaxonComparator
Verbatim
e0“Water salinity from 0.3 dS m-1 reduced the stomatal opening, transpiration”
Claim · model-written summary
Water salinity reduced CO2 assimilation.
Not reportedTaxonComparator
Verbatim
e0“Water salinity from 0.3 dS m-1 reduced the stomatal opening, transpiration, CO2 assimilation”
Claim · model-written summary
Water salinity inhibited passion fruit growth at 40 days.
- Taxon
- passion fruit
Passiflora edulise0 - Material
- ‘BRS Rubi do Cerrado’e0
- Organ / stage
- 40 days after sowinge0
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inhibited the growth of ‘BRS Rubi do Cerrado’ passion fruit plants, at 40 days after sowing”
Claim · model-written summary
Water salinity produced no CO2 restriction in the substomatal cavity.
- Taxon
- passion fruitPassiflora edulise0
- Treatment
- water salinity from 0.3 dS m-1e0
- Outcome
- CO2 restriction in the substomatal cavitye0
- Direction
- no CO2 restrictione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no CO2 restriction in the substomatal cavity of passion fruit plants grown under water salinity from 0.3 dS m-1.”
Claim · model-written summary
The 150 mg kg-1 potassium dose intensified salt stress effects on assimilation rate.
Not reportedTaxonComparator
Verbatim
e0“Potassium dose of 150 mg kg-1 of soil, corresponding to 100%, intensified the effect of salt stress on the assimilation rate”
Claim · model-written summary
The 150 mg kg-1 potassium dose intensified salt stress effects on carboxylation efficiency.
- Treatment
- Potassium dose of 150 mg kg-1 of soile0
- Outcome
- instantaneous carboxylation efficiencye0
- Direction
- intensifiede0
Not reportedTaxonComparator
Verbatim
e0“Potassium dose of 150 mg kg-1 of soil, corresponding to 100%, intensified the effect of salt stress on the assimilation rate and instantaneous carboxylation efficiency”
Claim · model-written summary
Water salinity and potassium dose interacted for chlorophyll a and b content.
- Taxon
- passion fruitPassiflora edulise0
- Treatment
- water salinity levels and potassium dosese0
- Outcome
- chlorophyll a and b contentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was interaction between water salinity levels and potassium doses for the chlorophyll a and b contents of 'BRS Rubi do Cerrado' passion fruit.”
The same questions in other papers
salinity · physiology: photosynthesis · Passiflora edulis (passion fruit)Positive and negative results
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See all 6 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.