Abstract
In Brazil semi-arid regions, excess of soluble salts is a limiting factor for the success of agricultural crops. An adequate supply of nutrients can cause positive responses in plant species under salt stress. The objective of this study was to analyze the effect of nitrogen and potassium on the morphophysiology of passion fruit (Passiflora edulis) seedlings subjected to saline stress. The design was a randomized blocks design, with treatments generated by the Box Central Composite Design matrix. Five electrical conductivities of irrigation water (ECw = 0.5, 0.98, 2.15, 3.32, and 3.80 dS m-1), five doses of nitrogen (N) and potassium (K) (0.0, 29.08, 100.0, 170.92, and 200.0%), in four replications. The combination of 200% NK stimulated the synthesis of chlorophyll a, and total chlorophyll under low salinity conditions (0.5 dS m-1). The chlorophyll a/b ratio was higher at ECw of 3.8 dS m-1 and under a concentration of 20.23% NK. The increase in water salinity from of 0.5 dS m-1 caused deleterious effects on the growth of passion fruit seedlings. The doses of NK between 100% and 120% improved the absolute growth rates of plant height and stem diameter, chlorophyll b, aerial dry matter, and total dry matter. The 200% dose of NK improved the leaf mass ratio. The combination of N and K applied foliar proved to be efficient in reducing the effects of salinity on the synthesis of photosynthetic pigments, providing better growth conditions for yellow passion fruit seedlings.
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Claims 7
Claim · model-written summary
200% NK stimulated the synthesis of chlorophyll a and total chlorophyll in passion fruit seedlings under low salinity (0.5 dS m-1).
- Taxon
- Passiflora edulis
Passiflora edulist0 - Treatment
- 200% NKe0
- Outcome
- synthesis of chlorophyll a, and total chlorophylle0
- Direction
- stimulatede0
- Qualifier
- under low salinity conditions (0.5 dS m-1)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of 200% NK stimulated the synthesis of chlorophyll a, and total chlorophyll under low salinity conditions (0.5 dS m-1)”
t0“Passiflora edulis”
Claim · model-written summary
The chlorophyll a/b ratio was higher at ECw of 3.8 dS m-1 and under 20.23% NK.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- ECw of 3.8 dS m-1 and under a concentration of 20.23% NKe0
- Outcome
- chlorophyll a/b ratioe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chlorophyll a/b ratio was higher at ECw of 3.8 dS m-1 and under a concentration of 20.23% NK”
t0“Passiflora edulis”
Claim · model-written summary
Increasing water salinity above 0.5 dS m-1 had deleterious effects on the growth of passion fruit seedlings.
- Taxon
- passion fruitPassiflora edulise0
- Treatment
- increase in water salinity from of 0.5 dS m-1e0
- Outcome
- growth of passion fruit seedlingse0
- Direction
- deleterious effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in water salinity from of 0.5 dS m-1 caused deleterious effects on the growth of passion fruit seedlings”
Claim · model-written summary
NK doses between 100% and 120% improved the absolute growth rates of plant height and stem diameter.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- doses of NK between 100% and 120%e0
- Outcome
- absolute growth rates of plant height and stem diametere0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The doses of NK between 100% and 120% improved the absolute growth rates of plant height and stem diameter”
t0“Passiflora edulis”
Claim · model-written summary
NK doses between 100% and 120% improved chlorophyll b, aerial dry matter and total dry matter.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- doses of NK between 100% and 120%e0
- Outcome
- chlorophyll b, aerial dry matter, and total dry mattere0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The doses of NK between 100% and 120% improved the absolute growth rates of plant height and stem diameter, chlorophyll b, aerial dry matter, and total dry matter”
t0“Passiflora edulis”
Claim · model-written summary
The 200% dose of NK improved the leaf mass ratio.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- 200% dose of NKe0
- Outcome
- leaf mass ratioe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 200% dose of NK improved the leaf mass ratio”
t0“Passiflora edulis”
Claim · model-written summary
Foliar N and K combination was efficient in reducing the effects of salinity on synthesis of photosynthetic pigments in yellow passion fruit seedlings.
- Taxon
- Passiflora edulisPassiflora edulist0
- Treatment
- combination of N and K applied foliare0
- Outcome
- effects of salinity on the synthesis of photosynthetic pigmentse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of N and K applied foliar proved to be efficient in reducing the effects of salinity on the synthesis of photosynthetic pigments”
t0“Passiflora edulis”
The same questions in other papers
potassium · physiology: photosynthesis · Passiflora edulis (passion fruit)Results agree
1 paper in the same direction as this paper
- positive
application · physiology: photosynthesis · Passiflora edulis (passion fruit)Results agree
1 paper in the same direction as this paper
- positive
nitrogen · physiology: photosynthesis · Passiflora edulis (passion fruit)Results agree
2 papers in the same direction as this paper
- positive
- positive
salinity · growth · Passiflora edulis (passion fruit)Results agree
15 papers in the same direction as this paper
- negative
- negative
- negative
12 papers more in this group
See all 16 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.