Abstract
Xyloglucan endotransglycosylase (XET) activity extractable from internodes of tall and dwarf varieties of pea (Pisum sativum L.) was assayed radiochemically using tamarind seed xyloglucan as donor substrate and an oligosaccharidyl-[3H]alditol as acceptor substrate. Internodes I and II showed little elongation during the period 15 to 21 d after sowing; XET activity remained relatively constant and was unaffected by exogenous gibberellic acid (GA3). A single application of GA3 to the dwarf genotype resulted in a small enhancement of elongation in internode III between d 17 and 21 and caused a small increase in XET activity in internode III. Repeated applications of GA3 caused internode V to elongate between d 20 and 26, to the same extent as in the tall variety, and concomitantly led to greatly elevated XET activity (expressed per unit fresh weight, per unit of extractable protein, and per internode). Thus, XET activity correlated with GA3-enhanced length in pea internodes; the possibility that this represents a causal relationship is discussed.
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 7
Claim · model-written summary
Internodes I and II showed little elongation between days 15 and 21.
- Taxon
- Pea
Lathyrus oleraceust0 - Organ / stage
- Internodes I and IIe0
- Outcome
- elongatione0
- Direction
- littlee0
- Qualifier
- 15 to 21 d after sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Internodes I and II showed little elongation during the period 15 to 21 d after sowing”
t0“Pea”
Claim · model-written summary
XET activity in internodes I and II remained relatively constant and was unaffected by exogenous GA3.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- exogenous gibberellic acid (GA3)e0
- Outcome
- XET activitye0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“XET activity remained relatively constant and was unaffected by exogenous gibberellic acid (GA3)”
t0“Pea”
Claim · model-written summary
A single GA3 application slightly enhanced dwarf-genotype internode III elongation between days 17 and 21.
- Taxon
- PeaLathyrus oleraceust0
- Material
- dwarf genotypee0
- Organ / stage
- internode IIIe0
- Treatment
- single application of GA3e0
- Outcome
- elongatione0
- Direction
- enhancemente0
- Qualifier
- between d 17 and 21e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single application of GA3 to the dwarf genotype resulted in a small enhancement of elongation in internode III between d 17 and 21”
t0“Pea”
Claim · model-written summary
A single GA3 application slightly increased XET activity in dwarf-genotype internode III.
- Taxon
- PeaLathyrus oleraceust0
- Material
- dwarf genotypee0
- Treatment
- single application of GA3e0
- Gene
- XETe0
- Outcome
- XET activitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single application of GA3 to the dwarf genotype resulted in a small enhancement of elongation in internode III between d 17 and 21 and caused a small increase in XET activity in internode III”
t0“Pea”
Claim · model-written summary
Repeated GA3 applications induced internode V elongation between days 20 and 26 to the tall-variety extent.
- Taxon
- PeaLathyrus oleraceust0
- Organ / stage
- internode Ve0
- Treatment
- Repeated applications of GA3e0
- Outcome
- elongatee0
- Direction
- elongatee0
- Qualifier
- between d 20 and 26e0
- Comparator
- tall varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Repeated applications of GA3 caused internode V to elongate between d 20 and 26, to the same extent as in the tall variety”
t0“Pea”
Claim · model-written summary
Repeated GA3 applications greatly elevated XET activity in internode V.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- Repeated applications of GA3e0
- Gene
- XETe0
- Outcome
- XET activitye0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Repeated applications of GA3 caused internode V to elongate between d 20 and 26, to the same extent as in the tall variety, and concomitantly led to greatly elevated XET activity”
t0“Pea”
Claim · model-written summary
XET activity correlated with GA3-enhanced internode length.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- internodese0
- Gene
- XETe0
- Outcome
- GA3-enhanced lengthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“XET activity correlated with GA3-enhanced length in pea internodes”
The same questions in other papers
Gibberellic acid · growth · Lathyrus oleraceus (pea)Results differ
33 papers in the same direction as this paper · 7 in the opposite direction
- positive
- negative
- no effect
37 papers more in this group
See all 41 papers →Gibberellic acid · molecular: metabolites · Lathyrus oleraceus (pea)Positive and negative results
11 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- negative
13 papers more in this group
See all 17 papers →gibberellin A3 · molecular: metabolites · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- negative
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.