Abstract
The occurrence of the abscission signal in young developing fruits on apple trees (Malus domestica) was studied. Apple has a natural system of fruitlet shedding, so called June drop. Although physiological fruit drop is unable to guarantee production of marketable apples and avoid alternate bearing, knowledge of this is a key background for successful fruit thinning. A study was carried out on apple trees cv. ‘Golden Delicious’ during June drop. On three dates (beginning, middle and after June drop), the daily dynamics of HPLC detected individual sugar and spectrophotometrically detected total phenolic contents were investigated in central (K) and lateral (L) fruitlets. The results of daily dynamics showed the highest sugar contents at 2 p.m. On the final sampling date, on 2nd July 2015, we observed a significant difference between sugar contents at 2 p.m. and the morning and afternoon measurements. Contents of sugars in K and L fruitlets were not significantly different. Total phenolic content at the beginning of June drop was higher than at the end. There was no statistically significant difference between K and L in an individual time period, while there were statistically significant differences in total phenolic content among the sampling dates. Although sugar and phenolic contents in K and L fruitlets were rarely statistically different, their contents changed during June drop. In general, sugar contents increased and phenolic contents decreased during the process, while the daily dynamic depended on weather conditions.
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Claims 9
Claim · model-written summary
Apple fruitlet sugar contents were highest at 2 p.m.
- Taxon
- Apple
Malus domesticat0 - Outcome
- sugar contentse0
- Direction
- higheste0
- Qualifier
- 2 p.m.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results of daily dynamics showed the highest sugar contents at 2 p.m.”
t0“Apple”
Claim · model-written summary
On 2 July 2015, sugar contents at 2 p.m. differed significantly from morning and afternoon measurements.
- Taxon
- AppleMalus domesticat0
- Outcome
- sugar contentse0
- Qualifier
- 2nd July 2015e0
- Comparator
- morning and afternoon measurementse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On the final sampling date, on 2nd July 2015, we observed a significant difference between sugar contents at 2 p.m. and the morning and afternoon measurements.”
t0“Apple”
Claim · model-written summary
Sugar contents of central and lateral fruitlets did not differ significantly.
- Taxon
- AppleMalus domesticat0
- Organ / stage
- K and L fruitletse0
- Outcome
- Contents of sugarse0
- Direction
- not significantly differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Contents of sugars in K and L fruitlets were not significantly different.”
t0“Apple”
Claim · model-written summary
Total phenolic content was higher at the beginning of June drop than at the end.
- Taxon
- AppleMalus domesticat0
- Outcome
- Total phenolic contente0
- Direction
- highere0
- Comparator
- at the ende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total phenolic content at the beginning of June drop was higher than at the end.”
t0“Apple”
Claim · model-written summary
Central and lateral fruitlets showed no significant difference in total phenolic content within a time period.
- Taxon
- AppleMalus domesticat0
- Organ / stage
- K and Le0
- Outcome
- Total phenolic contente1
- Direction
- no statistically significant differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no statistically significant difference between K and L in an individual time period”
e1“Total phenolic content at the beginning of June drop was higher than at the end.”
t0“Apple”
Claim · model-written summary
Total phenolic content differed significantly among sampling dates.
- Taxon
- AppleMalus domesticat0
- Outcome
- total phenolic contente0
- Qualifier
- among the sampling datese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were statistically significant differences in total phenolic content among the sampling dates.”
t0“Apple”
Claim · model-written summary
Sugar contents generally increased during June drop.
- Taxon
- AppleMalus domesticat0
- Outcome
- sugar contentse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, sugar contents increased and phenolic contents decreased during the process”
t0“Apple”
Claim · model-written summary
Phenolic contents generally decreased during June drop.
- Taxon
- AppleMalus domesticat0
- Outcome
- phenolic contentse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, sugar contents increased and phenolic contents decreased during the process”
t0“Apple”
Claim · model-written summary
Daily variation in sugar and phenolic contents depended on weather conditions.
- Taxon
- AppleMalus domesticat0
- Outcome
- daily dynamice0
- Direction
- depended one0
- Setting
- weather conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the daily dynamic depended on weather conditions”
e1“sugar contents increased and phenolic contents decreased”
t0“Apple”