Abstract
Summary‘Cripp’s Pink’ apple often develops a poor colour at commercial harvest,resulting in economic loss. To determine if fruit colour could be improved without advancing ripening, ‘Cripp’s Pink’ apple trees were sprayed with various synthetic auxins at different phenologic stages, from 30 d after bloom (30 DAB) until 150 DAB.The experiments were conducted in the North of Israel, from 2006 to 2008. Application of 50 mg l–1 of the synthetic auxin 2,4-dichlorophenoxypropionic acid (2,4-DP), as its butoxyethyl ester (PowerTM), or as its potassium salt 2,4-DP-P(PriganTM),at approx. 60 DAB, increased the rate of endogenous ethylene production by the fruit. This was accompanied by an increased concentration of anthocyanins in the fruit skin, and a higher percentage of red blush, without causingthe fruit drop that is usually associated with increased levels of ethylene. Although both auxins accelerated fruit maturation, neither had any negative effects on fruit quality at harvest, or after 6 months of storage at 0°C. The effects were specific to 2,4-DP (and 2,4-DP-P). Several other synthetic auxins such as 2,4- dichlorophenoxyacetic acid (2,4-D), naphthaleneacetic acid (NAA), 2,4-D plus NAA, and naphthaleneacetamide(NAD) plus NAA, had no effect on the red skin colour of ‘Cripp’s Pink’ apple. 2,4-DP sprays therefore represent an effective treatment to improve the colour of ‘Cripp’s Pink’ apple at commercial harvest, without adversely affecting other fruit quality attributes. Ared peel
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
Application of 2,4-DP butoxyethyl ester around 60 days after bloom increased endogenous ethylene production.
- Taxon
- apple
Malus domesticae1 - Material
- ‘Cripp’s Pink’e1
- Treatment
- 50 mg l–1 of the synthetic auxin 2,4-dichlorophenoxypropionic acid (2,4-DP), as its butoxyethyl ester (PowerTM)e0
- Outcome
- rate of endogenous ethylene productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 50 mg l–1 of the synthetic auxin 2,4-dichlorophenoxypropionic acid (2,4-DP), as its butoxyethyl ester (PowerTM), or as its potassium salt 2,4-DP-P(PriganTM),at approx. 60 DAB, increased the rate of endogenous ethylene production by the fruit.”
e1“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
Application of potassium-salt 2,4-DP around 60 days after bloom increased endogenous ethylene production.
- Taxon
- appleMalus domesticae1
- Material
- ‘Cripp’s Pink’e1
- Treatment
- its potassium salt 2,4-DP-P(PriganTM)e0
- Outcome
- rate of endogenous ethylene productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 50 mg l–1 of the synthetic auxin 2,4-dichlorophenoxypropionic acid (2,4-DP), as its butoxyethyl ester (PowerTM), or as its potassium salt 2,4-DP-P(PriganTM),at approx. 60 DAB, increased the rate of endogenous ethylene production by the fruit.”
e1“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
The auxin treatments increased fruit-skin anthocyanin concentration and red blush.
- Taxon
- appleMalus domesticae2
- Material
- ‘Cripp’s Pink’e2
- Treatment
- 2,4-DP (and 2,4-DP-P)e1
- Outcome
- concentration of anthocyanins in the fruit skin, and a higher percentage of red blushe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was accompanied by an increased concentration of anthocyanins in the fruit skin, and a higher percentage of red blush”
e1“2,4-DP (and 2,4-DP-P)”
e2“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
The auxin treatments did not cause fruit drop.
- Taxon
- appleMalus domesticae2
- Treatment
- 2,4-DP (and 2,4-DP-P)e1
- Outcome
- fruit drope0
- Direction
- without causinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without causingthe fruit drop that is usually associated with increased levels of ethylene”
e1“2,4-DP (and 2,4-DP-P)”
e2“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
Both auxins accelerated fruit maturation.
- Taxon
- appleMalus domesticae2
- Treatment
- 2,4-DP (and 2,4-DP-P)e1
- Outcome
- fruit maturatione0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both auxins accelerated fruit maturation”
e1“2,4-DP (and 2,4-DP-P)”
e2“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
Neither auxin harmed fruit quality at harvest or after six months at 0°C.
- Taxon
- appleMalus domesticae2
- Treatment
- 2,4-DP (and 2,4-DP-P)e1
- Outcome
- fruit qualitye0
- Direction
- neither had any negative effectse0
- Qualifier
- after 6 months of storage at 0°Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither had any negative effects on fruit quality at harvest, or after 6 months of storage at 0°C”
e1“2,4-DP (and 2,4-DP-P)”
e2“‘Cripp’s Pink’ apple trees”
Claim · model-written summary
Other synthetic auxins did not affect red skin color.
- Taxon
- appleMalus domesticae0
- Material
- ‘Cripp’s Pink’e0
- Treatment
- 2,4- dichlorophenoxyacetic acid (2,4-D), naphthaleneacetic acid (NAA), 2,4-D plus NAA, and naphthaleneacetamide(NAD) plus NAAe0
- Outcome
- red skin coloure0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several other synthetic auxins such as 2,4- dichlorophenoxyacetic acid (2,4-D), naphthaleneacetic acid (NAA), 2,4-D plus NAA, and naphthaleneacetamide(NAD) plus NAA, had no effect on the red skin colour of ‘Cripp’s Pink’ apple.”
Claim · model-written summary
The authors recommend 2,4-DP sprays to improve harvest apple color without harming other fruit quality traits.
- Taxon
- appleMalus domesticae0
- Material
- ‘Cripp’s Pink’e0
- Treatment
- 2,4-DP sprayse0
- Outcome
- improve the coloure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2,4-DP sprays therefore represent an effective treatment to improve the colour of ‘Cripp’s Pink’ apple at commercial harvest, without adversely affecting other fruit quality attributes”
The same questions in other papers
1-naphthaleneacetic acid · quality: postharvest · Malus domestica (apple)Positive and negative results
5 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 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.