Abstract
Abstract Mature trees of ‘Fantasia’ nectarine ( Prunus persica L. Batsch. ‘Fantasia’) were treated with the chemical growth regulator paclobutrazol (PP333) in the spring of 1983. Net photosynthetic gas exchange measurements were conducted on treated and control trees in the field at monthly intervals from May through September. Growth responses were measured at the end of the growing season. The paclobutrazol treatment resulted in a 67.9% decrease in annual extension shoot growth compared to controls and no apparent decrease in fruit yield or leaf photosynthetic rate. Total tree leaf area was reduced at the end of the season by an estimated 54.5% (so total tree photosynthesis may have been reduced). There were no apparent effects of either the presence of fruit or stage of fruit maturity on leaf CO 2 assimilation rate. Newly produced extension shoots on treated trees had shorter internodes, larger diameters, more flower buds per unit length, higher specific shoot dry weights but fewer buds per unit shoot dry weight, than on untreated trees.
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Claims 11
Claim · model-written summary
Paclobutrazol reduced annual extension shoot growth by 67.9% versus controls.
- Taxon
- Nectarine Trees
Prunus persica var. nucipersicat0 - Treatment
- paclobutrazole0
- Outcome
- annual extension shoot growthe0
- Direction
- decreasee0
- Value
- 67.9%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The paclobutrazol treatment resulted in a 67.9% decrease in annual extension shoot growth compared to controls”
t0“Nectarine Trees”
Claim · model-written summary
Paclobutrazol caused no apparent decrease in fruit yield.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole0
- Outcome
- fruit yielde0
- Direction
- no apparent decreasee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The paclobutrazol treatment resulted in a 67.9% decrease in annual extension shoot growth compared to controls and no apparent decrease in fruit yield”
t0“Nectarine Trees”
Claim · model-written summary
Paclobutrazol caused no apparent decrease in leaf photosynthetic rate.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- leaf photosynthetic ratee0
- Direction
- no apparent decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no apparent decrease in fruit yield or leaf photosynthetic rate”
e1“The paclobutrazol treatment resulted”
t0“Nectarine Trees”
Claim · model-written summary
Paclobutrazol reduced total tree leaf area by an estimated 54.5%.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- Total tree leaf areae0
- Direction
- reducede0
- Value
- 54.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total tree leaf area was reduced at the end of the season by an estimated 54.5%”
e1“The paclobutrazol treatment resulted”
t0“Nectarine Trees”
Claim · model-written summary
Fruit presence had no apparent effect on leaf CO 2 assimilation.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Organ / stage
- fruite0
- Outcome
- leaf CO 2 assimilation ratee0
- Direction
- no apparent effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no apparent effects of either the presence of fruit or stage of fruit maturity on leaf CO 2 assimilation rate”
t0“Nectarine Trees”
Claim · model-written summary
Fruit maturity stage had no apparent effect on leaf CO 2 assimilation.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Organ / stage
- stage of fruit maturitye0
- Outcome
- leaf CO 2 assimilation ratee0
- Direction
- no apparent effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no apparent effects of either the presence of fruit or stage of fruit maturity on leaf CO 2 assimilation rate”
t0“Nectarine Trees”
Claim · model-written summary
Treated extension shoots had shorter internodes and larger diameters than untreated shoots.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- internodese0
- Direction
- shortere0
- Comparator
- untreated treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Newly produced extension shoots on treated trees had shorter internodes, larger diameters, more flower buds per unit length, higher specific shoot dry weights but fewer buds per unit shoot dry weight, than on untreated trees”
e1“paclobutrazol (PP333)”
t0“Nectarine Trees”
Claim · model-written summary
Treated shoots had larger diameters than untreated shoots.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- diameterse0
- Direction
- largere0
- Comparator
- untreated treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Newly produced extension shoots on treated trees had shorter internodes, larger diameters, more flower buds per unit length, higher specific shoot dry weights but fewer buds per unit shoot dry weight, than on untreated trees”
e1“paclobutrazol (PP333)”
t0“Nectarine Trees”
Claim · model-written summary
Treated shoots had more flower buds per unit length.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- flower buds per unit lengthe0
- Direction
- moree0
- Comparator
- untreated treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more flower buds per unit length, higher specific shoot dry weights but fewer buds per unit shoot dry weight, than on untreated trees”
e1“paclobutrazol (PP333)”
t0“Nectarine Trees”
Claim · model-written summary
Treated shoots had higher specific shoot dry weights.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- specific shoot dry weightse0
- Direction
- highere0
- Comparator
- untreated treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher specific shoot dry weights but fewer buds per unit shoot dry weight, than on untreated trees”
e1“paclobutrazol (PP333)”
t0“Nectarine Trees”
Claim · model-written summary
Treated shoots had fewer buds per unit shoot dry weight.
- Taxon
- Nectarine TreesPrunus persica var. nucipersicat0
- Treatment
- paclobutrazole1
- Outcome
- buds per unit shoot dry weighte0
- Direction
- fewere0
- Comparator
- untreated treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fewer buds per unit shoot dry weight, than on untreated trees”
e1“paclobutrazol (PP333)”
t0“Nectarine Trees”
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See all 10 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.