Paper · 1984 · Journal of Plant Nutrition

The effect of paclobutrazol on the growth and uptake of Ca and K by apple seedlings1

Dariusz Swietlik; Stephen S. Miller

7
claims
14
verbatim quotes
11
citations
1
research areas
—
Not open access

Abstract

Abstract Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing reduced terminal growth, fresh weight increase (FWI), transpiration and Ca and K uptake per seedling. Total root surface area was not affected by PP333 treatment. Reduced Ca uptake preceded the reduction in transpiration and FWI. In the case of K these changes were parallel. This may indicate that different mechanisms were responsible for reduced Ca and K uptake in PP333‐treated plants. At the conclusion of the experiment control and treated plants were absorbing similar amounts of Ca per unit of FWI. At the same time the amount of K uptake per unit of FWI was significantly lower in treated than control plants.

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Claims 7

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Paclobutrazol at 0.2 ppm reduced terminal growth, fresh weight increase and transpiration of apple seedlings compared with control.

Treatment
paclobutrazol (PP333) at 0.2 ppme0
Outcome
terminal growth, fresh weight increase (FWI), transpiratione0
Direction
reducede0
Comparator
controle1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing reduced terminal growth, fresh weight increase (FWI), transpiration and Ca and K uptake per seedling”

✓ located verbatim in the source · abstract, characters 9–228 · show in text ↑
e1

“At the conclusion of the experiment control and treated plants were absorbing similar amounts of Ca per unit of FWI”

✓ located verbatim in the source · abstract, characters 518–633 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Paclobutrazol at 0.2 ppm reduced Ca and K uptake per seedling of apple seedlings compared with control.

Treatment
paclobutrazol (PP333) at 0.2 ppme0
Outcome
Ca and K uptake per seedlinge0
Direction
reducede0
Comparator
controle1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing reduced terminal growth, fresh weight increase (FWI), transpiration and Ca and K uptake per seedling”

✓ located verbatim in the source · abstract, characters 9–228 · show in text ↑
e1

“At the conclusion of the experiment control and treated plants were absorbing similar amounts of Ca per unit of FWI”

✓ located verbatim in the source · abstract, characters 518–633 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Reduced Ca uptake preceded the reduction in transpiration and fresh weight increase in apple seedlings.

Outcome
Ca uptakee5
Direction
Reducede5
Qualifier
preceded the reduction in transpiration and FWIe5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing”

✓ located verbatim in the source · abstract, characters 9–127 · show in text ↑
e5

“Reduced Ca uptake preceded the reduction in transpiration and FWI”

✓ located verbatim in the source · abstract, characters 291–356 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Control and paclobutrazol-treated apple seedlings absorbed similar amounts of Ca per unit of FWI at the end of the experiment.

Treatment
paclobutrazol (PP333) at 0.2 ppme0
Outcome
amounts of Ca per unit of FWIe1
Direction
similare1
Comparator
controle1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing”

✓ located verbatim in the source · abstract, characters 9–127 · show in text ↑
e1

“At the conclusion of the experiment control and treated plants were absorbing similar amounts of Ca per unit of FWI”

✓ located verbatim in the source · abstract, characters 518–633 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

K uptake per unit of FWI was significantly lower in paclobutrazol-treated than in control apple seedlings.

Treatment
paclobutrazol (PP333) at 0.2 ppme0
Outcome
amount of K uptake per unit of FWIe2
Direction
lowere2
Comparator
control plantse2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing”

✓ located verbatim in the source · abstract, characters 9–127 · show in text ↑
e2

“At the same time the amount of K uptake per unit of FWI was significantly lower in treated than control plants”

✓ located verbatim in the source · abstract, characters 635–745 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Paclobutrazol treatment did not affect total root surface area of apple seedlings.

Treatment
PP333 treatmente3
Outcome
Total root surface areae3
Direction
not affectede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing”

✓ located verbatim in the source · abstract, characters 9–127 · show in text ↑
e3

“Total root surface area was not affected by PP333 treatment”

✓ located verbatim in the source · abstract, characters 230–289 · show in text ↑
Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

Different mechanisms may be responsible for the reduced Ca and K uptake in paclobutrazol-treated apple seedlings.

Outcome
reduced Ca and K uptakee4
Qualifier
different mechanisms were responsiblee4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“Addition of paclobutrazol (PP333) at 0.2 ppm to a nutrient solution in which 11‐month‐old apple seedlings were growing reduced terminal growth, fresh weight increase (FWI), transpiration and Ca and K uptake per seedling”

✓ located verbatim in the source · abstract, characters 9–228 · show in text ↑
e4

“different mechanisms were responsible for reduced Ca and K uptake”

✓ located verbatim in the source · abstract, characters 427–492 · show in text ↑

paclobutrazol · growth · Malus domestica (apple)Results differ

21 papers: 13 positive, 8 negative or no effect

7 papers in the same direction as this paper · 13 in the opposite direction

  1. positive
  2. negative
  3. positive

17 papers more in this group

See all 21 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.