Abstract
Two experiments were carried out on "White Sim" standard carnation and "Dallas" roses, in order to study the effects of ethanol, as an anti-ethylene agent, in comparison to silver salts on the vase life and quality of the cut flowers in the presence or absence of external ethylene source. The experiments were conducted at the Dept. of Plant Production, College of Agric., King Saud University, Saudi Arabia durin; the two successive seasons 1995 and 1996. Within each season, carnation experiment was conducted twice on 1st of March and 151 of April, and, rose experiment on 151 of May and 151 of June in each year. Flowers were placed in eiher deionized distilled water, 4% ethanol, 6% ethanol, 1 mM silver nitrate, and 1 mM silver thiosulfate (STS) solutions containing zero or 50 ppm ethephon. Flowers were placed inside fully controlled growth chambers under standard conditions of 20°C, 16 hours of 2000 lux fluorescent light, 60 - 70 % relative humidity, and continuous air circulation of low velocity. Data were collected on vase life, fresh weight gain, and average daily solution uptake of the flower. The results showed that, in the absence of ethephon from the solution, all chemicals improved vase life and quality of both carnation and roses compared with the 01 water. In the absence of etbephon, silver nitrate solution gave best results of vase life, maximum weight ga n, and solution uptake for both carnation and roses. STS solution rankec second, followed by 6% ethanol, while 4% ethanol' ranked fourth in descending order for all previous measurements. The results also showed that the presence of ethephon in the solution reduced vase life and quality of both carnation and roses, and it was observed that carnation was more affected by ethephon than roses. In the presence of 50 ppm ethephon in the solution, all chemic" Is improved vase life of cut roses in comparison with 01 water containing ethe-ohon, while STS and 6% ethanol were the only two chemicals that improvec vase life of cut carnation. In addition, in the presence of ethephon in Ihe solution, STS was the best chemical, followed by 6% ethanol for both "White Sim" carnation and "Dallas" roses. In this respect, it was concluded that in the absence of external ethylene, at least a part of cut carnation and rose senescence is caused by the effect of internal ethylene produced by the flower issue. Ethanol is a promising chemical that could be used in flower preservative solutions as an anti-ethylene agent, but further studies are needed before giving recommendations for optimum concentration that could be used for cifferent cut flowers.
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Claims 9
Claim · model-written summary
In the absence of ethephon, silver nitrate solution gave the best vase life in carnation
- Taxon
- carnation
Dianthus caryophylluse2 - Treatment
- silver nitrate solutione2
- Outcome
- vase lifee2
- Direction
- best resultse2
- Qualifier
- absence of etbephone2
- Comparator
- 01 watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that, in the absence of ethephon from the solution, all chemicals improved vase life and quality of both carnation and roses compared with the 01 water”
e2“In the absence of etbephon, silver nitrate solution gave best results of vase life, maximum weight ga n, and solution uptake for both carnation and roses”
Claim · model-written summary
In the absence of ethephon, silver nitrate solution gave the best vase life in roses
Verbatim
e1“The results showed that, in the absence of ethephon from the solution, all chemicals improved vase life and quality of both carnation and roses compared with the 01 water”
e2“In the absence of etbephon, silver nitrate solution gave best results of vase life, maximum weight ga n, and solution uptake for both carnation and roses”
Claim · model-written summary
With ethephon present, STS and 6% ethanol were the only two chemicals that improved vase life in carnation
- Taxon
- carnationDianthus caryophylluse4
- Treatment
- STS and 6% ethanole4
- Outcome
- vase lifee4
- Direction
- improvece4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“while STS and 6% ethanol were the only two chemicals that improvec vase life of cut carnation”
Claim · model-written summary
Ethephon in the solution reduced vase life in carnation
- Taxon
- carnationDianthus caryophylluse3
- Treatment
- ethephon in the solutione3
- Outcome
- vase lifee3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The results also showed that the presence of ethephon in the solution reduced vase life and quality of both carnation and roses, and it was observed that carnation was more affected by ethephon than roses”
Claim · model-written summary
Ethephon in the solution reduced vase life in roses
Not reportedComparator
Verbatim
e3“The results also showed that the presence of ethephon in the solution reduced vase life and quality of both carnation and roses, and it was observed that carnation was more affected by ethephon than roses”
Claim · model-written summary
Carnation was more affected by ethephon than roses
- Taxon
- carnationDianthus caryophylluse3
- Treatment
- ethephone3
- Outcome
- affected by ethephone3
- Direction
- moree3
- Comparator
- rosese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The results also showed that the presence of ethephon in the solution reduced vase life and quality of both carnation and roses, and it was observed that carnation was more affected by ethephon than roses”
Claim · model-written summary
With ethephon present, STS was the best chemical for carnation vase life, ahead of 6% ethanol
- Taxon
- carnationDianthus caryophylluse4
- Treatment
- STSe5
- Outcome
- vase lifee4
- Direction
- beste5
- Comparator
- 6% ethanole5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“while STS and 6% ethanol were the only two chemicals that improvec vase life of cut carnation”
e5“STS was the best chemical, followed by 6% ethanol”
Claim · model-written summary
With ethephon present, STS was the best chemical for rose vase life, ahead of 6% ethanol
Verbatim
e2“In the absence of etbephon, silver nitrate solution gave best results of vase life, maximum weight ga n, and solution uptake for both carnation and roses”
e5“STS was the best chemical, followed by 6% ethanol”
Claim · model-written summary
At least part of cut carnation and rose senescence may be caused by internal ethylene produced by the flower
Verbatim
e6“at least a part of cut carnation and rose senescence is caused by the effect of internal ethylene produced by the flower issue”
The same questions in other papers
thiosulfate · quality: postharvest · Dianthus caryophyllus (carnation)Positive and negative results
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- no effect
- positive
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See all 5 papers →silver atom · quality: postharvest · Dianthus caryophyllus (carnation)Positive and negative results
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- no effect
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See all 15 papers →ethanol · quality: postharvest · Dianthus caryophyllus (carnation)Results agree
1 paper in the same direction as this paper
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silver(1+) nitrate · quality: postharvest · Dianthus caryophyllus (carnation)Results agree
2 papers in the same direction as this paper
- positive
- positive
thiosulfate · quality: postharvest · RosaResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
silver(1+) nitrate · quality: postharvest · RosaResults agree
10 papers in the same direction as this paper
- positive
- positive
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See all 11 papers →silver atom · quality: postharvest · RosaResults agree
11 papers in the same direction as this paper
- positive
- positive
- positive
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See all 12 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.