Abstract
SummaryIn four successive years the amount of starch found by enzymic and microscopic methods was significantly larger in non-bearing spurs than in fruit-bearing ones of the biennial cropping cultivar Landsberger Reinette. Every year a dramatic fall in the starch content was observed in the fruit-bearing spurs at the end of June between the 5th and 6th week after full bloom. Applying foliar sprays to on-year trees of succinic acid-2,2-dimethylhydrazide (aminozide) and naphthaleneacetic acid (NAA) caused cessation of growth accompanied by a significant increase in the spur starch content despite the presence of fruits. The flowering of the treated trees was doubled. Gibberellic acid (GA3) applied to off-year trees reduced the starch level in their spurs. It is concluded that the starch content in spurs is lowered by hormones supplied by developing seeds. Hence a high starch content cannot be regarded as a direct cause of flower initiation but only as an excellent and rapid indicator of the direction of metabolic processes resulting from low amounts of auxin and gibberellins in the surrounding tissues.
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 8
Claim · model-written summary
Non-bearing spurs contained significantly more starch than fruit-bearing spurs in four years.
- Taxon
- apple tree
Malus domesticat0 - Material
- Landsberger Reinettee0
- Outcome
- amount of starche0
- Direction
- largere0
- Comparator
- fruit-bearing onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In four successive years the amount of starch found by enzymic and microscopic methods was significantly larger in non-bearing spurs than in fruit-bearing ones of the biennial cropping cultivar Landsberger Reinette.”
t0“apple tree”
Claim · model-written summary
Fruit-bearing spur starch content fell dramatically at the end of June, 5 to 6 weeks after full bloom.
- Taxon
- apple treeMalus domesticat0
- Organ / stage
- fruit-bearing spurse0
- Outcome
- starch contente0
- Direction
- falle0
- Qualifier
- between the 5th and 6th week after full bloome0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Every year a dramatic fall in the starch content was observed in the fruit-bearing spurs at the end of June between the 5th and 6th week after full bloom.”
t0“apple tree”
Claim · model-written summary
Aminozide spray stopped growth and significantly increased spur starch despite fruit presence.
- Taxon
- apple treeMalus domesticat0
- Treatment
- succinic acid-2,2-dimethylhydrazide (aminozide)e0
- Outcome
- spur starch contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying foliar sprays to on-year trees of succinic acid-2,2-dimethylhydrazide (aminozide) and naphthaleneacetic acid (NAA) caused cessation of growth accompanied by a significant increase in the spur starch content despite the presence of fruits.”
t0“apple tree”
Claim · model-written summary
NAA spray stopped growth and significantly increased spur starch despite fruit presence.
- Taxon
- apple treeMalus domesticat0
- Treatment
- naphthaleneacetic acid (NAA)e0
- Outcome
- spur starch contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying foliar sprays to on-year trees of succinic acid-2,2-dimethylhydrazide (aminozide) and naphthaleneacetic acid (NAA) caused cessation of growth accompanied by a significant increase in the spur starch content despite the presence of fruits.”
t0“apple tree”
Claim · model-written summary
Treated trees had doubled flowering.
- Taxon
- apple treeMalus domesticat0
- Treatment
- treatede0
- Outcome
- floweringe0
- Direction
- doublede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The flowering of the treated trees was doubled.”
t0“apple tree”
Claim · model-written summary
GA3 on off-year trees reduced spur starch.
- Taxon
- apple treeMalus domesticat0
- Treatment
- Gibberellic acid (GA3)e0
- Outcome
- starch levele0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid (GA3) applied to off-year trees reduced the starch level in their spurs.”
t0“apple tree”
Claim · model-written summary
Authors conclude hormones from developing seeds lower spur starch.
- Taxon
- apple treeMalus domesticat0
- Outcome
- starch content in spurse0
- Qualifier
- hormones supplied by developing seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the starch content in spurs is lowered by hormones supplied by developing seeds.”
t0“apple tree”
Claim · model-written summary
Authors consider high spur starch an indicator of metabolic processes linked to low auxin and gibberellins, not a direct flower-initiation cause.
- Taxon
- apple treeMalus domesticat0
- Compound
- auxin and gibberellinse0
- Outcome
- flower initiatione0
- Qualifier
- indicator of the direction of metabolic processese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high starch content cannot be regarded as a direct cause of flower initiation but only as an excellent and rapid indicator of the direction of metabolic processes resulting from low amounts of auxin and gibberellins in the surrounding tissues.”
t0“apple tree”
The same questions in other papers
1-naphthaleneacetic acid · quality: sugar starch · Malus domestica (apple)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
4 papers more in this group
See all 8 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.