Abstract
The effects of low temperature storage on the physiology of cut rose flowers ( Rosa hybridaL. cv. Mercedes) were studied. Extension of cold storage or increase in temperature (from 3 to 8°C) was accompanied by shortening of vase life and advancement of petal senescence, as reflected in an advance in the timing of the rise in ethylene production and an increase in membrane permeability (ion leakage). Although storage at a relative humidity (RH) of 65% reduced petal water content by 20% in comparison with flowers stored at 95% RH, it did not shorten vase life. The progression of petal senescence was measured during storage at 3°C and during aging at 22°C. Both ethylene production rates and membrane microviscosity measured by fluorescence depolarization increased with time at 3°C and at 22°C, but more slowly at 3°C. At 3°C membrane permeability measured by ion leakage did not increase. Following cold storage the rate of ethylene production in the petals was increased by up to eight times the rate in unstored flowers. Silver thiosulphate extended the vase life of both stored and fresh flowers equally by 2 days, but did not increase the life of stored flowers to that of treated fresh flowers. It is concluded that the primary effect of cold storage on roses is to slow down senescence and that the continued slow senescence leads to shorter vase life. The possible occurrence of sequential processes during senescence and the effects of temperature on these processes is discussed.
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Claims 8
Claim · model-written summary
Longer or warmer cold storage shortened vase life and advanced petal senescence.
Verbatim
e0“Extension of cold storage or increase in temperature (from 3 to 8°C) was accompanied by shortening of vase life and advancement of petal senescence”
t0“rose flowers”
Claim · model-written summary
Low humidity reduced petal water content by 20% relative to 95% humidity.
Verbatim
e0“storage at a relative humidity (RH) of 65% reduced petal water content by 20% in comparison with flowers stored at 95% RH”
t0“rose flowers”
Claim · model-written summary
Low humidity did not shorten vase life.
Verbatim
e0“Although storage at a relative humidity (RH) of 65% reduced petal water content by 20% in comparison with flowers stored at 95% RH, it did not shorten vase life.”
t0“rose flowers”
Claim · model-written summary
Ethylene production and membrane microviscosity rose with time, more slowly at 3°C than at 22°C.
Verbatim
e0“Both ethylene production rates and membrane microviscosity measured by fluorescence depolarization increased with time at 3°C and at 22°C, but more slowly at 3°C.”
t0“rose flowers”
Claim · model-written summary
Membrane permeability did not increase at 3°C.
Verbatim
e0“At 3°C membrane permeability measured by ion leakage did not increase.”
t0“rose flowers”
Claim · model-written summary
Cold storage increased petal ethylene production up to eightfold over unstored flowers.
Verbatim
e0“Following cold storage the rate of ethylene production in the petals was increased by up to eight times the rate in unstored flowers.”
t0“rose flowers”
Claim · model-written summary
Silver thiosulphate prolonged vase life of fresh and stored flowers by two days.
Not reportedComparator
Verbatim
e0“Silver thiosulphate extended the vase life of both stored and fresh flowers equally by 2 days”
t0“rose flowers”
Claim · model-written summary
Silver thiosulphate did not bring stored flower vase life up to treated fresh flower vase life.
- Taxon
- roset0
- Outcome
- life of stored flowerse0
- Direction
- did not increasee0
- Comparator
- treated fresh flowerse0
Not reportedTreatment
Verbatim
e0“did not increase the life of stored flowers to that of treated fresh flowers.”
t0“rose flowers”
The same questions in other papers
silver atom · quality: postharvest · RosaResults agree
11 papers in the same direction as this paper
- positive
- positive
- positive
8 papers more in this group
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.