Abstract
ABSTRACT The impact that nitrogen (N), phosphorus (P), and potassium (K) application rates on the sulfur (S) fractions in leaves and fruits of greenhouse-grown cucumbers plants (Cucumis sativus L. cv. Brunex) are presented. The treatments were as follows: N (N1=5 g NO3NH4/m2, N2=10 g NO3NH4/m2, N3=20 g NO3NH4/m2, N4=40 g NO3NH4/m2), two levels of P (P1=8 g H3PO4/m2 and P2=16 g H3PO4/m2), and two levels of K (K1=20 g K2SO4/m2 and K2=40 g K2SO4/m2). The foliar and fruit contents were determined for total S, organic S and sulfate. The influence of the N treatments on the total S (St: organic S +sulfate) concentration, proved significant, showing a progressive increase in the leaf and fruit concentrations. In the leaves, the P slightly diminished the St concentration but values in the fruits did not appreciably differ from control. The K dosage did not cause the St concentration to differ from that of P, although in the fruit a slightly lower St concentration appeared in the K2 treatment. The response of the organic-S concentration in the leaves resembled that of St, and thus organic S should not be used as a diagnostic method for S status. In the relationship SO4 2-/St, the SO4 2- concentration proved more influential than did the St form, providing a more accurate representation of the potential status of this nutrient in the plant.
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Claims 8
Claim · model-written summary
N treatments progressively increased the total S concentration in leaves and fruits, significantly.
- Taxon
- CUCUMBER
Cucumis sativust0 - Organ / stage
- leaf and fruite1
- Treatment
- N treatmentse1
- Outcome
- total Se1
- Direction
- progressive increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e1“The influence of the N treatments on the total S (St: organic S +sulfate) concentration, proved significant, showing a progressive increase in the leaf and fruit concentrations.”
Claim · model-written summary
P slightly diminished the St concentration in leaves.
- Taxon
- CUCUMBERCucumis sativust0
- Organ / stage
- leavese2
- Treatment
- Pe2
- Outcome
- St concentratione2
- Direction
- slightly diminishede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e2“In the leaves, the P slightly diminished the St concentration but values in the fruits did not appreciably differ from control.”
Claim · model-written summary
P did not appreciably change the St concentration in fruits relative to control.
- Taxon
- CUCUMBERCucumis sativust0
- Organ / stage
- fruitse2
- Treatment
- Pe2
- Outcome
- St concentratione2
- Direction
- did not appreciably differe2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e2“In the leaves, the P slightly diminished the St concentration but values in the fruits did not appreciably differ from control.”
Claim · model-written summary
The K dosage did not change the St concentration relative to the P treatment.
- Taxon
- CUCUMBERCucumis sativust0
- Treatment
- K dosagee3
- Outcome
- St concentratione3
- Direction
- did not causee3
- Comparator
- Pe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e3“The K dosage did not cause the St concentration to differ from that of P, although in the fruit a slightly lower St concentration appeared in the K2 treatment.”
Claim · model-written summary
The K2 treatment gave a slightly lower St concentration in fruit.
- Taxon
- CUCUMBERCucumis sativust0
- Organ / stage
- fruite3
- Treatment
- K2 treatmente3
- Outcome
- St concentratione3
- Direction
- slightly lowere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e3“The K dosage did not cause the St concentration to differ from that of P, although in the fruit a slightly lower St concentration appeared in the K2 treatment.”
Claim · model-written summary
Organic-S concentration in leaves resembled the St concentration response.
- Taxon
- CUCUMBERCucumis sativust0
- Organ / stage
- leavese4
- Outcome
- organic-S concentratione4
- Direction
- resemblede4
- Comparator
- Ste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e4“The response of the organic-S concentration in the leaves resembled that of St, and thus organic S should not be used as a diagnostic method for S status.”
Claim · model-written summary
Organic S should not be used as a diagnostic method for S status.
- Taxon
- CUCUMBERCucumis sativust0
- Outcome
- diagnostic method for S statuse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e4“The response of the organic-S concentration in the leaves resembled that of St, and thus organic S should not be used as a diagnostic method for S status.”
Claim · model-written summary
Sulfate (SO4 2-) concentration gave a more accurate representation of the potential S status in the plant than the St form.
- Taxon
- CUCUMBERCucumis sativust0
- Compound
- SO4 2-e5
- Outcome
- potential status of this nutriente5
- Direction
- more accuratee5
- Comparator
- the St forme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“FORMS OF SULFUR IN LEAVES AND FRUITS OF CUCUMBER”
e5“In the relationship SO4 2-/St, the SO4 2- concentration proved more influential than did the St form, providing a more accurate representation of the potential status of this nutrient in the plant.”
The same questions in other papers
phosphorus · molecular: metabolites · Cucumis sativus (cucumber)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.