Abstract
Abstract Greenhouse grown 'Golden Delicious' apple seedlings were treated with soil drenches of paclobutrazol (PP333) at rates equivalent to 0.1, 0.2, 0.4, 0.8, and 1.6 kg of active ingredient (a.i.) ha.‐1 Eleven weeks after treatment initiation, seedlings were harvested, divided into leaves, stems, and roots, weighed and analyzed for the content of macro‐and microelements. Shoot growth rate, leaf area, and total dry weight showed a decreasing trend with increasing rates of PP333. In contrast, specific leaf weight increased in response to growth regulator treatments. The total amount of N, Zn, and Cu absorbed by seedlings was not affected and that of K, Ca, Mg, and Mn was decreased by PP333 treatments. Concentration of Ca and Mn in leaves, N in roots, and N, Ca, Mg, Mn, Zn, and Cu in stems increased in response to PP333 treatments. The magnitude of these increases were dependent on the rate of growth regulator applied. Potassium was the only element which declined in concentration in leaves and stems; this was true, however, only at the two highest rates of PP333 (0.8 and 1.6 kg ha‐1) Root K concentration was not affected by PP333 treatments. Key words: plant growth regulatorPP333 Malus domestica Borkh Notes The use of trade names in this paper does not imply endorsement by the U.S. Department of Agriculture of the products named, nor criticism of similar ones not mentioned. Mention of a growth regulator in this paper does not constitute a recommendation for use by the U.S. Department of Agriculture nor does it imply registration under FIFRA as amended. Plant Physiologist, West Virginia University. Research Horticulturist
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Claims 10
Claim · model-written summary
Shoot growth rate, leaf area and total dry weight decreased with increasing PP333 rates.
- Taxon
- apple seedlings
Malus domesticat0 - Treatment
- increasing rates of PP333e0
- Outcome
- Shoot growth rate, leaf area, and total dry weighte0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot growth rate, leaf area, and total dry weight showed a decreasing trend with increasing rates of PP333.”
t0“apple seedlings”
Claim · model-written summary
Specific leaf weight increased after growth regulator treatment.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- growth regulator treatmentse0
- Outcome
- specific leaf weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast, specific leaf weight increased in response to growth regulator treatments.”
t0“apple seedlings”
Claim · model-written summary
Total N, Zn and Cu uptake was unaffected by PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- total amount of N, Zn, and Cu absorbed by seedlingse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total amount of N, Zn, and Cu absorbed by seedlings was not affected and that of K, Ca, Mg, and Mn was decreased by PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Total K, Ca, Mg and Mn uptake decreased under PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- K, Ca, Mg, and Mne0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total amount of N, Zn, and Cu absorbed by seedlings was not affected and that of K, Ca, Mg, and Mn was decreased by PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Leaf Ca and Mn concentrations increased under PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- Concentration of Ca and Mn in leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration of Ca and Mn in leaves, N in roots, and N, Ca, Mg, Mn, Zn, and Cu in stems increased in response to PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Root N concentration increased under PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- N in rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration of Ca and Mn in leaves, N in roots, and N, Ca, Mg, Mn, Zn, and Cu in stems increased in response to PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Stem N, Ca and Mg concentrations increased under PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- N, Ca, Mge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration of Ca and Mn in leaves, N in roots, and N, Ca, Mg, Mn, Zn, and Cu in stems increased in response to PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Stem Mn, Zn and Cu concentrations increased under PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- Mn, Zn, and Cu in stemse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration of Ca and Mn in leaves, N in roots, and N, Ca, Mg, Mn, Zn, and Cu in stems increased in response to PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Leaf and stem potassium concentrations declined only at the two highest PP333 rates.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- two highest rates of PP333 (0.8 and 1.6 kg ha‐1)e0
- Outcome
- Potassiume0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium was the only element which declined in concentration in leaves and stems; this was true, however, only at the two highest rates of PP333 (0.8 and 1.6 kg ha‐1) Root K concentration was not affected by PP333 treatments.”
t0“apple seedlings”
Claim · model-written summary
Root K concentration was unaffected by PP333.
- Taxon
- apple seedlingsMalus domesticat0
- Treatment
- PP333 treatmentse0
- Outcome
- Root K concentratione0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium was the only element which declined in concentration in leaves and stems; this was true, however, only at the two highest rates of PP333 (0.8 and 1.6 kg ha‐1) Root K concentration was not affected by PP333 treatments.”
t0“apple seedlings”
The same questions in other papers
paclobutrazol · growth · Malus domestica (apple)Results differ
7 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- no effect
17 papers more in this group
See all 21 papers →paclobutrazol · nutrient: content · Malus domestica (apple)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
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.