Abstract
The movement of the radioactivity from sucrose, indole‐3‐acetic acid (IAA) and phosphate has been examined in excised bean leaves. Preferential translocation of the labelled materials toward the base of leaf and petiole was demonstrated, suggesting a natural mobilization gradient down the leaf and petiole. Establishment of other mobilization centers in the leaf by local application of N 6 ‐benzyladenine diverted the movement of the sucrose label and, to a lesser extent, the phosphate label. There was no apparent mobilization of IAA by benzyladenine. Evidence is provided that there is a continuity of label from the source to the sink regions, and it is suggested that reported instances of noncontinuity of label may be attributable to the refixation of respired C 14 O 2 by tissue treated with benzyladenine. The observations appear to substantiate the concept that the unloading of solutes from the phloem can regulate the direction and intensity of translocation.
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Claims 7
Claim · model-written summary
Labelled materials moved preferentially toward the base of the leaf and petiole, suggesting a natural mobilization gradient.
Verbatim
e0“excised bean leaves”
e1“Preferential translocation of the labelled materials toward the base of leaf and petiole was demonstrated, suggesting a natural mobilization gradient down the leaf and petiole”
Claim · model-written summary
Local application of N6-benzyladenine diverted the movement of the sucrose label.
- Taxon
- beane0
- Treatment
- local application of N 6 ‐benzyladeninee2
- Outcome
- movement of the sucrose labele2
- Direction
- divertede2
Not reportedComparator
Verbatim
e0“excised bean leaves”
e2“local application of N 6 ‐benzyladenine diverted the movement of the sucrose label”
Claim · model-written summary
Local application of N6-benzyladenine diverted the phosphate label to a lesser extent than the sucrose label.
- Taxon
- beane0
- Treatment
- local application of N 6 ‐benzyladeninee2
- Outcome
- phosphate labele3
- Direction
- divertede2
- Qualifier
- to a lesser extente3
Not reportedComparator
Verbatim
e0“excised bean leaves”
e2“local application of N 6 ‐benzyladenine diverted the movement of the sucrose label”
e3“to a lesser extent, the phosphate label”
Claim · model-written summary
Benzyladenine did not apparently mobilize IAA.
Not reportedComparatorDirection
Verbatim
e0“excised bean leaves”
e4“There was no apparent mobilization of IAA by benzyladenine”
Claim · model-written summary
Evidence indicates continuity of label from the source to the sink regions.
Verbatim
e0“excised bean leaves”
e5“Evidence is provided that there is a continuity of label from the source to the sink regions”
Claim · model-written summary
Reported non-continuity of label may be attributable to refixation of respired CO2 by benzyladenine-treated tissue.
Verbatim
e0“excised bean leaves”
e6“reported instances of noncontinuity of label may be attributable to the refixation of respired C 14 O 2 by tissue treated with benzyladenine”
Claim · model-written summary
The unloading of solutes from the phloem may regulate the direction and intensity of translocation.
Verbatim
e0“excised bean leaves”
e7“the unloading of solutes from the phloem can regulate the direction and intensity of translocation”
The same questions in other papers
N-benzyladenine · molecular: metabolites · Phaseolus vulgaris (common bean)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 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.