Abstract
Peach [( Prunus persica (L.) Batsch., `Rutgers Redleaf'] trees were grown for two seasons in a greenhouse with three pruning treatments (none, shoot tips removed, and half the shoots removed) and three grass treatments (no grass competition; perennial ryegrass, Lolium perenne L., `Linn'; and tall fescue, Festuca arundinacea Schreb, `Kentucky 31'). Competing grass reduced shoot growth, leaf area, and weight of fine roots in shallow soil, but did not affect the growth response to pruning. Regrowth from pruned trees was such that the shoot: root ratio was restored to that of unpruned trees. Leaf water potential, stomatal conductance, and photosynthesis had decreased markedly by 48 hours after irrigation ceased in trees without competition (larger trees) and to a similar level by 96 hours in trees with competition (smaller trees). Apparently, the reduced leaf area of peach trees grown with grass competition delayed water stress. Leaf abscisic acid levels were not directly affected by grass competition but increased as leaf water potential decreased. Grass competition modified morphology and reduced tree size, but did not affect shoot growth following pruning.
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Claims 13
Claim · model-written summary
Competing grass reduced peach shoot growth.
- Taxon
- Peach Trees
Prunus persicat0 - Treatment
- Competing grasse0
- Outcome
- shoot growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competing grass reduced shoot growth, leaf area, and weight of fine roots in shallow soil, but did not affect the growth response to pruning.”
t0“Peach Trees”
Claim · model-written summary
Competing grass reduced peach leaf area.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- Competing grasse0
- Outcome
- leaf areae0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competing grass reduced shoot growth, leaf area, and weight of fine roots in shallow soil, but did not affect the growth response to pruning.”
t0“Peach Trees”
Claim · model-written summary
Competing grass reduced peach weight of fine roots.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- Competing grasse0
- Outcome
- weight of fine rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competing grass reduced shoot growth, leaf area, and weight of fine roots in shallow soil, but did not affect the growth response to pruning.”
t0“Peach Trees”
Claim · model-written summary
Grass competition did not affect peach shoot growth response to pruning.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- Competing grasse0
- Outcome
- growth response to pruninge0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Competing grass reduced shoot growth, leaf area, and weight of fine roots in shallow soil, but did not affect the growth response to pruning.”
t0“Peach Trees”
Claim · model-written summary
Pruned peach trees restored their shoot to root ratio to the level of unpruned trees.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- pruned treese0
- Outcome
- shoot: root ratioe0
- Direction
- restorede0
- Comparator
- unpruned treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regrowth from pruned trees was such that the shoot: root ratio was restored to that of unpruned trees.”
t0“Peach Trees”
Claim · model-written summary
Leaf water potential decreased by 48 hours after irrigation ceased without grass competition and by 96 hours with it.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- irrigation ceasede0
- Outcome
- Leaf water potentiale0
- Direction
- decreasede0
- Qualifier
- by 48 hourse0
- Comparator
- trees with competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf water potential, stomatal conductance, and photosynthesis had decreased markedly by 48 hours after irrigation ceased in trees without competition (larger trees) and to a similar level by 96 hours in trees with competition (smaller trees).”
t0“Peach Trees”
Claim · model-written summary
stomatal conductance decreased by 48 hours after irrigation ceased without grass competition and by 96 hours with it.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- irrigation ceasede0
- Outcome
- stomatal conductancee0
- Direction
- decreasede0
- Qualifier
- by 48 hourse0
- Comparator
- trees with competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf water potential, stomatal conductance, and photosynthesis had decreased markedly by 48 hours after irrigation ceased in trees without competition (larger trees) and to a similar level by 96 hours in trees with competition (smaller trees).”
t0“Peach Trees”
Claim · model-written summary
photosynthesis decreased by 48 hours after irrigation ceased without grass competition and by 96 hours with it.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- irrigation ceasede0
- Outcome
- photosynthesise0
- Direction
- decreasede0
- Qualifier
- by 48 hourse0
- Comparator
- trees with competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf water potential, stomatal conductance, and photosynthesis had decreased markedly by 48 hours after irrigation ceased in trees without competition (larger trees) and to a similar level by 96 hours in trees with competition (smaller trees).”
t0“Peach Trees”
Claim · model-written summary
The authors attribute delayed water stress under grass competition to reduced peach leaf area.
- Taxon
- peach treesPrunus persicae0
- Treatment
- grass competitione0
- Outcome
- delayed water stresse0
- Qualifier
- reduced leaf areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparently, the reduced leaf area of peach trees grown with grass competition delayed water stress.”
Claim · model-written summary
Grass competition did not directly affect leaf abscisic acid levels.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- grass competitione0
- Outcome
- Leaf abscisic acid levelse0
- Direction
- not directly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf abscisic acid levels were not directly affected by grass competition but increased as leaf water potential decreased.”
t0“Peach Trees”
Claim · model-written summary
Leaf abscisic acid levels increased as leaf water potential decreased.
- Taxon
- Peach TreesPrunus persicat0
- Compound
- abscisic acide0
- Outcome
- Leaf abscisic acid levelse0
- Direction
- increasede0
- Qualifier
- as leaf water potential decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf abscisic acid levels were not directly affected by grass competition but increased as leaf water potential decreased.”
t0“Peach Trees”
Claim · model-written summary
Grass competition modified peach tree morphology.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- Grass competitione0
- Outcome
- morphologye0
- Direction
- modifiede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grass competition modified morphology and reduced tree size, but did not affect shoot growth following pruning.”
t0“Peach Trees”
Claim · model-written summary
Grass competition reduced peach tree size.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- Grass competitione0
- Outcome
- tree sizee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grass competition modified morphology and reduced tree size, but did not affect shoot growth following pruning.”
t0“Peach Trees”
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See all 26 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.