Abstract
One-year-old peach trees (Prunus persica (L.) Batsch) were severely pruned in July by removing 60% of the shoots. Tree responses were analyzed in terms of architecture and nutritional status. Tree growth was recorded from July to September by nondestructive (leaf production, thickening and branching of the remaining secondary axes) and destructive measurements (biomass partitioning and concentrations of total nitrogen (N) and nonstructural carbohydrates (NC) in specific tissues). The dry weights of pruned trees were lower than those of control trees at the end of the growing season (i.e., 2.5 months after pruning), whereas shoot:root ratios were restored to the initial values. Tree response occurred in two stages. During the first 24 days following pruning, the growth components of the remaining secondary axes were similar to the control, and new secondary axes were produced. During the next 17 days, increases in both diameter and branching of secondary axes contributed to the maintenance of pruned tree growth rate (similar to that of control trees) and restoration of initial shoot:root ratios. No significant effect of pruning was observed on NC concentrations, whereas N concentrations increased in several organs of the pruned trees during the first growth period. The transient increase in internal N availability contributed to the initiation of new axes and the restoration of a more functional biomass partitioning between shoots and roots.
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Claims 9
Claim · model-written summary
Pruned peach trees had lower dry weight than controls at season end.
- Taxon
- peach trees
Prunus persicat0 - Treatment
- prunede0
- Outcome
- dry weightse0
- Direction
- lowere0
- Qualifier
- 2.5 months after pruninge0
- Comparator
- control treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry weights of pruned trees were lower than those of control trees at the end of the growing season (i.e., 2.5 months after pruning), whereas shoot:root ratios were restored to the initial values.”
t0“peach trees”
Claim · model-written summary
Pruned peach trees restored shoot:root ratios to initial values.
- Taxon
- peach treesPrunus persicat0
- Treatment
- prunede0
- Outcome
- shoot:root ratiose0
- Direction
- restorede0
- Comparator
- initial valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry weights of pruned trees were lower than those of control trees at the end of the growing season (i.e., 2.5 months after pruning), whereas shoot:root ratios were restored to the initial values.”
t0“peach trees”
Claim · model-written summary
Growth components of remaining secondary axes were similar to control for the first 24 days after pruning.
- Taxon
- peach treesPrunus persicat0
- Treatment
- pruninge0
- Outcome
- growth components of the remaining secondary axese0
- Direction
- similare0
- Qualifier
- first 24 dayse0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the first 24 days following pruning, the growth components of the remaining secondary axes were similar to the control, and new secondary axes were produced.”
t0“peach trees”
Claim · model-written summary
New secondary axes formed in the first 24 days after pruning.
- Taxon
- peach treesPrunus persicat0
- Treatment
- pruninge0
- Outcome
- new secondary axes were producede0
- Qualifier
- first 24 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the first 24 days following pruning, the growth components of the remaining secondary axes were similar to the control, and new secondary axes were produced.”
t0“peach trees”
Claim · model-written summary
Secondary axis diameter and branching increased in the subsequent 17 days.
- Taxon
- peach treesPrunus persicat0
- Outcome
- diameter and branching of secondary axese0
- Direction
- increasese0
- Qualifier
- next 17 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the next 17 days, increases in both diameter and branching of secondary axes contributed to the maintenance of pruned tree growth rate (similar to that of control trees) and restoration of initial shoot:root ratios.”
t0“peach trees”
Claim · model-written summary
Pruned tree growth rate remained similar to controls in the next 17 days.
- Taxon
- peach treesPrunus persicat0
- Treatment
- prunede0
- Outcome
- tree growth ratee0
- Direction
- similare0
- Qualifier
- next 17 dayse0
- Comparator
- control treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the next 17 days, increases in both diameter and branching of secondary axes contributed to the maintenance of pruned tree growth rate (similar to that of control trees) and restoration of initial shoot:root ratios.”
t0“peach trees”
Claim · model-written summary
Pruning did not significantly affect nonstructural carbohydrate concentrations.
- Taxon
- peach treesPrunus persicat0
- Treatment
- pruninge0
- Outcome
- NC concentrationse0
- Direction
- No significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effect of pruning was observed on NC concentrations, whereas N concentrations increased in several organs of the pruned trees during the first growth period.”
t0“peach trees”
Claim · model-written summary
Nitrogen concentrations increased in several organs of pruned trees in the first growth period.
- Taxon
- peach treesPrunus persicat0
- Organ / stage
- several organse0
- Treatment
- prunede0
- Outcome
- N concentrationse0
- Direction
- increasede0
- Qualifier
- first growth periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant effect of pruning was observed on NC concentrations, whereas N concentrations increased in several organs of the pruned trees during the first growth period.”
t0“peach trees”
Claim · model-written summary
Transient internal nitrogen availability contributed to new axis initiation and more functional shoot-root biomass partitioning.
- Taxon
- peach treesPrunus persicat0
- Outcome
- initiation of new axes and the restoration of a more functional biomass partitioninge0
- Qualifier
- transient increase in internal N availabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transient increase in internal N availability contributed to the initiation of new axes and the restoration of a more functional biomass partitioning between shoots and roots.”
t0“peach trees”
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