Abstract
SUMMARY Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L. Removal of the root tip caused: (1) The cessation of elongation of the AR. (2) An increase in the number of LRs per cm which developed on the AR. (3) Changes in the distribution of LRs along the mother root One aspect of the distribution modified by the decapitation was the suppression of an apical zone without LRs which was observed immediately behind the apex in intact roots. In decapitated ones by contrast accumulation of LRs was enhanced in this zone. Moreover, decapitation appeared responsible for successive LRs opposite the same xylem pole developing nearer each other than in intact roots. (4) Changes in the frequency and location of clumps of LRs. In decapitated roots 21.6%, of the total number of LRs were clumped. In intact ARs this figure was only 13.5%. Moreover, intact roots showed a tendency to LR clumping preferentially in their basal zone In contrast, clumps of LRs were noted indistinctly in both basal and distal zones of decapitated ARs. I his fact implies that removal of the root tip enhances the natural tendency toward clumping of LRs, chiefly in distal zones of the AR. Other aspects of the pattern remain unchanged after removing the root apex. Hence in decapitated as well as intact ARs there were two neighbouring xylem poles opposite which large number of LRs were produced, whereas the remaining ones were considerably less prolific. A further aspect which was not altered by the decapitation was the significantly high frequency of formation of neighbour LRs opposite adjacent xylem poles.
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Claims 10
Claim · model-written summary
Removal of the root tip caused cessation of elongation of the adventitious root.
- Taxon
- Allium cepa L.
Allium cepae0 - Treatment
- Removal of the root tipe1
- Outcome
- elongatione1
- Direction
- cessatione1
- Comparator
- intact (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e1“Removal of the root tip caused: (1) The cessation of elongation of the AR. (2) An increase in the number of LRs per cm which developed on the AR”
Claim · model-written summary
Removal of the root tip increased the number of lateral roots per cm on the adventitious root.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- Removal of the root tipe1
- Outcome
- number of LRs per cme1
- Direction
- increasee1
- Comparator
- intact (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e1“Removal of the root tip caused: (1) The cessation of elongation of the AR. (2) An increase in the number of LRs per cm which developed on the AR”
Claim · model-written summary
Removal of the root tip changed the distribution of lateral roots along the mother root.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- Removal of the root tipe1
- Outcome
- distribution of LRs along the mother roote2
- Direction
- Changese2
- Comparator
- intact (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e1“Removal of the root tip caused: (1) The cessation of elongation of the AR. (2) An increase in the number of LRs per cm which developed on the AR”
e2“Changes in the distribution of LRs along the mother root”
Claim · model-written summary
Decapitation enhanced the accumulation of lateral roots in the apical zone compared with intact roots.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- decapitatede3
- Outcome
- accumulation of LRse3
- Direction
- enhancede3
- Comparator
- intact rootse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e3“One aspect of the distribution modified by the decapitation was the suppression of an apical zone without LRs which was observed immediately behind the apex in intact roots. In decapitated ones by contrast accumulation of LRs was enhanced in this zone”
Claim · model-written summary
Decapitation suppressed the apical zone without lateral roots that is present in intact roots.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- decapitatione3
- Outcome
- apical zone without LRse3
- Direction
- suppressione3
- Comparator
- intact rootse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e3“One aspect of the distribution modified by the decapitation was the suppression of an apical zone without LRs which was observed immediately behind the apex in intact roots. In decapitated ones by contrast accumulation of LRs was enhanced in this zone”
Claim · model-written summary
Decapitation made successive lateral roots opposite the same xylem pole develop nearer each other than in intact roots.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- decapitatione4
- Outcome
- successive LRs opposite the same xylem polee4
- Direction
- nearere4
- Comparator
- intact rootse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e4“Moreover, decapitation appeared responsible for successive LRs opposite the same xylem pole developing nearer each other than in intact roots”
Claim · model-written summary
In decapitated adventitious roots 21.6% of lateral roots were clumped, against 13.5% in intact roots.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- decapitatede5
- Outcome
- clumpede5
- Direction
- higherinferrede5
- Value
- 21.6%e5
- Qualifier
- 13.5%e5
- Comparator
- intact ARse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e5“In decapitated roots 21.6%, of the total number of LRs were clumped. In intact ARs this figure was only 13.5%”
Claim · model-written summary
Removal of the root tip enhances the natural tendency of lateral roots to clump, chiefly in distal zones.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- removal of the root tipe6
- Outcome
- natural tendency toward clumping of LRse6
- Direction
- enhancese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e6“removal of the root tip enhances the natural tendency toward clumping of LRs, chiefly in distal zones of the AR”
Claim · model-written summary
In decapitated adventitious roots, lateral root clumps were noted indistinctly in both basal and distal zones.
- Taxon
- Allium cepa L.Allium cepae0
- Organ / stage
- decapitated ARse7
- Outcome
- clumps of LRse7
- Qualifier
- noted indistinctly in both basal and distal zonese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e7“clumps of LRs were noted indistinctly in both basal and distal zones of decapitated ARs”
Claim · model-written summary
Decapitation did not alter the high frequency of neighbour lateral roots opposite adjacent xylem poles.
- Taxon
- Allium cepa L.Allium cepae0
- Treatment
- decapitatione1
- Outcome
- frequency of formation of neighbour LRs opposite adjacent xylem polese1
- Direction
- not alterede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distribution patterns of lateral roots (LRs) were analysed in intact (control) and decapitated adventitious roots (ARs) of Allium cepa L.”
e1“A further aspect which was not altered by the decapitation was the significantly high frequency of formation of neighbour LRs opposite adjacent xylem poles”
The same questions in other papers
pruning · growth · Allium cepa (onion)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
See all 6 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.