Abstract
Indol-3-ylacetic acid (IAA), gibberellin A3 (GA) and 6 benzylaminopurine (BAP) were applied factorially each at 3×10−2 M in lanolin to the roots and stems of Sitka spruce seedlings and the activity of the two secondary meristems, the vascular cambium and phellogen, and of the parenchymatous tissues between them, was examined. All the treatments, with the exception of GA produced a localized stimulation of radial growth at the point of application and there was a similarity in the response of the various tissues in both the root and stem. Radial growth of the xylem was not significantly affected in the roots whereas in the stems BAP and IAA stimulated growth. In the phloem BAP produced significant stimulation in both roots and stems and IAA stimulated growth in the roots. Growth of the parenchyma and periderm external to the phloem was also strongly stimulated by both BAP, and IAA in roots and stems. In roots and stems the application of BAP altered the derivatives produced by the vascular cambium, resulting in the production of large multiseriate rays in the xylem, and giving rise to an overall increase in the proportion of ray tissue.
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Claims 10
Claim · model-written summary
Treatments other than GA stimulated local radial growth.
- Taxon
- Picea sitchensis
.jpg?width=60)
Picea sitchensist0 - Treatment
- All the treatments, with the exception of GAe0
- Outcome
- radial growthe0
- Direction
- stimulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“All the treatments, with the exception of GA produced a localized stimulation of radial growth at the point of application”
t0“Picea sitchensis”
Claim · model-written summary
Root xylem radial growth was not significantly affected.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- rootse0
- Outcome
- Radial growth of the xyleme0
- Direction
- not significantly affectede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Radial growth of the xylem was not significantly affected in the roots”
t0“Picea sitchensis”
Claim · model-written summary
BAP stimulated stem xylem growth.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- stemse0
- Treatment
- BAPe0
- Outcome
- growthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the stems BAP and IAA stimulated growth”
t0“Picea sitchensis”
Claim · model-written summary
IAA stimulated stem xylem growth.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- stemse0
- Treatment
- IAAe0
- Outcome
- growthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the stems BAP and IAA stimulated growth”
t0“Picea sitchensis”
Claim · model-written summary
BAP significantly stimulated phloem in roots and stems.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- roots and stemse0
- Treatment
- BAPe0
- Outcome
- phloeme0
- Direction
- stimulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the phloem BAP produced significant stimulation in both roots and stems”
t0“Picea sitchensis”
Claim · model-written summary
IAA stimulated root phloem growth.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- rootse0
- Treatment
- IAAe0
- Outcome
- growthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA stimulated growth in the roots”
t0“Picea sitchensis”
Claim · model-written summary
BAP strongly stimulated parenchyma and periderm growth in roots and stems.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- roots and stemse0
- Treatment
- BAPe0
- Outcome
- Growth of the parenchyma and periderme0
- Direction
- strongly stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of the parenchyma and periderm external to the phloem was also strongly stimulated by both BAP, and IAA in roots and stems”
t0“Picea sitchensis”
Claim · model-written summary
IAA strongly stimulated parenchyma and periderm growth in roots and stems.
- Taxon
- Picea sitchensisPicea sitchensist0
- Organ / stage
- roots and stemse0
- Treatment
- IAAe0
- Outcome
- Growth of the parenchyma and periderme0
- Direction
- strongly stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of the parenchyma and periderm external to the phloem was also strongly stimulated by both BAP, and IAA in roots and stems”
t0“Picea sitchensis”
Claim · model-written summary
BAP caused large multiseriate xylem rays in roots and stems.
- Taxon
- Picea sitchensisPicea sitchensist0
- Treatment
- BAPe0
- Outcome
- large multiseriate rays in the xyleme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of BAP altered the derivatives produced by the vascular cambium, resulting in the production of large multiseriate rays in the xylem”
t0“Picea sitchensis”
Claim · model-written summary
BAP increased the proportion of ray tissue.
- Taxon
- Picea sitchensisPicea sitchensist0
- Treatment
- BAPe1
- Outcome
- proportion of ray tissuee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“giving rise to an overall increase in the proportion of ray tissue”
t0“Picea sitchensis”
e1“the application of BAP altered the derivatives produced by the vascular cambium”
The same questions in other papers
N-benzyladenine · growth · Picea sitchensis (Sitka spruce)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.