Abstract
Poor, delayed and ununiform bud break is a major problem for peaches in greenhouse. To clarify the mechanism of breaking bud dormancy in nectarine, the effect of three dormancy-breaking agents, which were applied to the surface of dormant buds in two-year old ‘NJ72’ nectarine (Prunus persica L. Batsch), was investigated. Treatment of intact nectarine plant with 2% thiourea (w/v) in November advanced flower bud break in the following spring by 20 days, while potassium nitrate was of no effect. But thiourea had a phytotoxic effect. The effect of ammonium nitrate was very similar to that of potassium nitrate, and flowering with the 2 nitrates was ununiform. In flower buds those were treated with dormancy-breaking agents, catalase activity was inhibited soon after treatment, whereas peroxidase activity increased, and changes of superoxide dismutase remained little. The rate of respiration in flower buds increased by chemicals during dormancy, among of which, the rate of the pentose phosphate pathway was also increased, while the rate of the Embden-Meyerh pathway decreased and the rate of tricarboxlic acid cycle changed little. The activity of glucose 6-phosphate dehydrogenase, the key enzyme in the pentose phosphate pathway (PPP), increased by dormancy-breaking agents, concomitantly with the activation of the pentose phosphate pathway.
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 13
Claim · model-written summary
Thiourea advanced nectarine flower bud break by 20 days.
- Taxon
- nectarine
Prunus persica var. nucipersicae0 - Treatment
- 2% thiourea (w/v)e0
- Outcome
- flower bud breake0
- Direction
- advancede0
- Value
- 20 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of intact nectarine plant with 2% thiourea (w/v) in November advanced flower bud break in the following spring by 20 days, while potassium nitrate was of no effect.”
Claim · model-written summary
Potassium nitrate did not affect nectarine flower bud break.
- Taxon
- nectarinePrunus persica var. nucipersicae0
- Treatment
- potassium nitratee0
- Outcome
- flower bud breake0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of intact nectarine plant with 2% thiourea (w/v) in November advanced flower bud break in the following spring by 20 days, while potassium nitrate was of no effect.”
Claim · model-written summary
Thiourea caused phytotoxicity in nectarine.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- thioureae0
- Outcome
- phytotoxic effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But thiourea had a phytotoxic effect.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Ammonium nitrate had an effect similar to potassium nitrate on nectarine bud break.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- ammonium nitratee0
- Outcome
- effecte0
- Direction
- very similare0
- Comparator
- potassium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of ammonium nitrate was very similar to that of potassium nitrate, and flowering with the 2 nitrates was ununiform.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Flowering after nitrate treatment was nonuniform.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- 2 nitratese0
- Outcome
- floweringe0
- Direction
- ununiforme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flowering with the 2 nitrates was ununiform.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Dormancy-breaking agents inhibited flower-bud catalase activity soon after treatment.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Organ / stage
- flower budse0
- Treatment
- dormancy-breaking agentse0
- Outcome
- catalase activitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In flower buds those were treated with dormancy-breaking agents, catalase activity was inhibited soon after treatment, whereas peroxidase activity increased, and changes of superoxide dismutase remained little.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Dormancy-breaking agents increased flower-bud peroxidase activity.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Organ / stage
- flower budse0
- Treatment
- dormancy-breaking agentse0
- Outcome
- peroxidase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In flower buds those were treated with dormancy-breaking agents, catalase activity was inhibited soon after treatment, whereas peroxidase activity increased, and changes of superoxide dismutase remained little.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Flower-bud superoxide dismutase changed little after dormancy-breaking treatment.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Organ / stage
- flower budse0
- Treatment
- dormancy-breaking agentse0
- Outcome
- superoxide dismutasee0
- Direction
- remained littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In flower buds those were treated with dormancy-breaking agents, catalase activity was inhibited soon after treatment, whereas peroxidase activity increased, and changes of superoxide dismutase remained little.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Chemicals increased respiration in dormant nectarine flower buds.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Organ / stage
- flower budse0
- Treatment
- chemicalse0
- Outcome
- rate of respiratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of respiration in flower buds increased by chemicals during dormancy”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Chemicals increased the pentose phosphate pathway rate.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- chemicalse0
- Outcome
- rate of the pentose phosphate pathwaye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of respiration in flower buds increased by chemicals during dormancy, among of which, the rate of the pentose phosphate pathway was also increased”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Chemicals decreased the Embden-Meyerh pathway rate.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- chemicalse0
- Outcome
- rate of the Embden-Meyerh pathwaye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of respiration in flower buds increased by chemicals during dormancy, among of which, the rate of the pentose phosphate pathway was also increased, while the rate of the Embden-Meyerh pathway decreased”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
The tricarboxlic acid cycle rate changed little after chemical treatment.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- chemicalse0
- Outcome
- rate of tricarboxlic acid cyclee0
- Direction
- changed littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of respiration in flower buds increased by chemicals during dormancy, among of which, the rate of the pentose phosphate pathway was also increased, while the rate of the Embden-Meyerh pathway decreased and the rate of tricarboxlic acid cycle changed little.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
Claim · model-written summary
Dormancy-breaking agents increased glucose 6-phosphate dehydrogenase activity.
- Taxon
- nectarinePrunus persica var. nucipersicae1
- Treatment
- dormancy-breaking agentse0
- Gene
- glucose 6-phosphate dehydrogenasee0
- Outcome
- activity of glucose 6-phosphate dehydrogenasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of glucose 6-phosphate dehydrogenase, the key enzyme in the pentose phosphate pathway (PPP), increased by dormancy-breaking agents, concomitantly with the activation of the pentose phosphate pathway.”
t0“油桃”
e1“two-year old ‘NJ72’ nectarine”
The same questions in other papers
thiourea · crop injury · Prunus persica (peach)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.