Abstract
Peach seedlings were grown in aerated nutrient solution in small (15 cm3) or large (500 cm3) containers. Subsequently some plants were removed from the small to the large containers or were stressed by root pruning. Half the plants received a foliar spray of 6-benzylaminopurine (BAP) every 4 days. Root restriction eventually impaired growth rates and ultimately plant size. The effect of root pruning was quickly overcome by a redistribution of growth in favour of the roots. When restricted plants were transferred into large containers there was an accompanying rapid root growth and plants attained a comparable size to unrestricted plants. BAP applied to the leaves to some extent overcame the reduced growth of restricted plants, however, its major effect was on the distribution of dry matter. Restriction and BAP application, in general, reduced the levels of mineral nutrients in the leaves. It is argued that the limit set by the roots on top growth involves an internal regulation by the root, in particular the production and supply of growth substances. The evidence suggests that this is related to root morphology and must be taken into account when studying top:root inter-relationships. The experiment highlights the importance of root restriction as a technique for manipulating root growth and studying root function and its interaction with the top. Some implications of controlled root growth in the field are discussed.
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Claims 10
Claim · model-written summary
Root restriction impaired growth rate and final plant size.
- Taxon
- Peach
Prunus persicat0 - Treatment
- Root restrictione0
- Outcome
- growth rates and ultimately plant sizee0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root restriction eventually impaired growth rates and ultimately plant size.”
t0“Peach Seedlings”
Claim · model-written summary
Root pruning was followed by rapid recovery through growth redistribution toward roots.
- Taxon
- PeachPrunus persicat0
- Treatment
- root pruninge0
- Outcome
- redistribution of growth in favour of the rootse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of root pruning was quickly overcome by a redistribution of growth in favour of the roots.”
t0“Peach Seedlings”
Claim · model-written summary
Transfer of restricted plants to large containers caused rapid root growth.
- Taxon
- PeachPrunus persicat0
- Treatment
- transferred into large containerse0
- Outcome
- root growthe0
- Direction
- rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When restricted plants were transferred into large containers there was an accompanying rapid root growth and plants attained a comparable size to unrestricted plants.”
t0“Peach Seedlings”
Claim · model-written summary
Transferred plants reached a size comparable with unrestricted plants.
- Taxon
- PeachPrunus persicat0
- Treatment
- transferred into large containerse0
- Outcome
- sizee0
- Direction
- comparablee0
- Comparator
- unrestricted plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When restricted plants were transferred into large containers there was an accompanying rapid root growth and plants attained a comparable size to unrestricted plants.”
t0“Peach Seedlings”
Claim · model-written summary
Foliar BAP partly overcame growth reduction in restricted plants.
- Taxon
- PeachPrunus persicat0
- Treatment
- BAP applied to the leavese0
- Outcome
- reduced growth of restricted plantse0
- Direction
- overcamee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BAP applied to the leaves to some extent overcame the reduced growth of restricted plants”
t0“Peach Seedlings”
Claim · model-written summary
Foliar BAP mainly affected dry matter distribution.
- Taxon
- PeachPrunus persicat1
- Treatment
- BAPe1
- Outcome
- distribution of dry mattere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its major effect was on the distribution of dry matter.”
t0“6-Benzylaminopurine”
t1“Peach Seedlings”
e1“BAP applied to the leaves”
Claim · model-written summary
Restriction reduced mineral nutrient levels in leaves.
- Taxon
- PeachPrunus persicat0
- Treatment
- Restrictione0
- Outcome
- levels of mineral nutrients in the leavese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Restriction and BAP application, in general, reduced the levels of mineral nutrients in the leaves.”
t0“Peach Seedlings”
Claim · model-written summary
BAP reduced mineral nutrient levels in leaves.
- Taxon
- PeachPrunus persicat0
- Treatment
- BAP applicatione0
- Outcome
- levels of mineral nutrients in the leavese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Restriction and BAP application, in general, reduced the levels of mineral nutrients in the leaves.”
t0“Peach Seedlings”
Claim · model-written summary
Authors argue that root control of top growth involves supply of growth substances.
- Taxon
- PeachPrunus persicat0
- Organ / stage
- rootse0
- Outcome
- top growthe0
- Qualifier
- production and supply of growth substancese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is argued that the limit set by the roots on top growth involves an internal regulation by the root, in particular the production and supply of growth substances.”
t0“Peach Seedlings”
Claim · model-written summary
The authors relate the root effect to root morphology.
- Taxon
- PeachPrunus persicat0
- Outcome
- root morphologye0
- Qualifier
- related to root morphologye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The evidence suggests that this is related to root morphology”
t0“Peach Seedlings”
The same questions in other papers
N-benzyladenine · growth · Prunus persica (peach)Results differ
19 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
20 papers more in this group
See all 24 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.