Abstract
Grafting experiments have been carried out in which rootstocks of the cultivar Craigella were paired with scions of an isogenic line Craigella Lateral Suppressor (ls ls) and vice versa, and the levels of hormones in the roots and shoots of the grafted plants examined. The roots of Craigella plants differed from those of Lateral Suppressor in that they contained a higher proportion of a cytokinin that co-chromatographed with N6 - (Δ2—isopentenyl) adenosine. Reciprocal grafts did not lead to any qualitative or quantitative changes in the cytokinins in the roots of either line. Grafting Lateral Suppressor scions on Craigella rootstocks led to an increase in the IAA content of the apical region and the ABA content of the stem tissue immediately below it, but when Craigella scions were grafted on Lateral Suppressor rootstocks there were no changes in the level of either hormone. Cytokinins applied to the leaf axils of Lateral Suppressor plants resulted in lateral bud initiation in the axils above the point of treatment but not if the plants were also given a short period of far-red light at the end of the photoperiod. Cytokinins were ineffective in initiating lateral buds in grafted Lateral Suppressor scions. It is suggested that root-produced cytokinins influence lateral bud outgrowth indirectly by way of their effect on the levels of IAA and ABA in the shoot.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Craigella roots had a higher proportion of the specified cytokinin than Lateral Suppressor roots.
- Taxon
- Tomato
Solanum lycopersicumt0 - Material
- Craigellae0
- Outcome
- proportion of a cytokinine0
- Direction
- highere0
- Comparator
- Lateral Suppressore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“The roots of Craigella plants differed from those of Lateral Suppressor in that they contained a higher proportion of a cytokinin that co-chromatographed with N6 - (Δ2—isopentenyl) adenosine.”
Claim · model-written summary
Reciprocal grafts did not change root cytokinins in either line.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Reciprocal graftse0
- Outcome
- cytokinins in the rootse0
- Direction
- did not lead to any qualitative or quantitative changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Reciprocal grafts did not lead to any qualitative or quantitative changes in the cytokinins in the roots of either line.”
Claim · model-written summary
Lateral Suppressor scions on Craigella rootstocks had increased apical IAA.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- Lateral Suppressore0
- Treatment
- Grafting Lateral Suppressor scions on Craigella rootstockse0
- Outcome
- IAA content of the apical regione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Grafting Lateral Suppressor scions on Craigella rootstocks led to an increase in the IAA content of the apical region”
Claim · model-written summary
Lateral Suppressor scions on Craigella rootstocks had increased stem ABA.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Grafting Lateral Suppressor scions on Craigella rootstockse0
- Outcome
- ABA content of the stem tissue immediately below ite0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Grafting Lateral Suppressor scions on Craigella rootstocks led to an increase in the IAA content of the apical region and the ABA content of the stem tissue immediately below it”
Claim · model-written summary
The reciprocal Craigella scion graft did not change either hormone level.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Craigella scions were grafted on Lateral Suppressor rootstockse0
- Outcome
- level of either hormonee0
- Direction
- no changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“when Craigella scions were grafted on Lateral Suppressor rootstocks there were no changes in the level of either hormone.”
Claim · model-written summary
Applied cytokinins initiated lateral buds above treatment in Lateral Suppressor plants.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Cytokinins applied to the leaf axilse0
- Outcome
- lateral bud initiation in the axils above the point of treatmente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Cytokinins applied to the leaf axils of Lateral Suppressor plants resulted in lateral bud initiation in the axils above the point of treatment”
Claim · model-written summary
A short far-red light period prevented cytokinin-induced bud initiation.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- a short period of far-red light at the end of the photoperiode0
- Outcome
- not if the plants were also given a short period of far-red lighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“but not if the plants were also given a short period of far-red light at the end of the photoperiod.”
Claim · model-written summary
Cytokinins did not initiate lateral buds in grafted Lateral Suppressor scions.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Cytokininse0
- Outcome
- initiating lateral buds in grafted Lateral Suppressor scionse0
- Direction
- ineffectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“Cytokinins were ineffective in initiating lateral buds in grafted Lateral Suppressor scions.”
Claim · model-written summary
The authors suggest root cytokinins affect bud outgrowth through shoot IAA and ABA.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- lateral bud outgrowthe0
- Qualifier
- effect on the levels of IAA and ABA in the shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato”
e0“It is suggested that root-produced cytokinins influence lateral bud outgrowth indirectly by way of their effect on the levels of IAA and ABA in the shoot.”
The same questions in other papers
grafting · physiology: hormones · Solanum lycopersicum (tomato)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.