Abstract
Peony is one of the most important ornamental plants in the international flower market, but has a relatively short vase life in water. This study tested the effects of 8-hydroxyquinoline citrate (8-HQC) and nanosilver (NS) in combination with sucrose, as well as two commercial preservatives, on the longevity and some physiological and biochemical aspects of senescence of cut flowers of 14 cultivars. Responses varied both by cultivar and treatment. The preservatives extended the vase life in only five cultivars; however, in nine cultivars, preservatives increased the flower diameter and improved the general flower appearance. Blockages in xylem vessels started to appear soon after harvest. Both NS and 8-HQC with sucrose prevented tylose formation, while bacterial blockages were reduced only by the NS solution. Reduction in stem blockages did not translate into better water balance or flower longevity. The highest carbohydrate accumulation in petals was observed in the NS solution. Preservatives mitigated the rise in free amino acids, including free proline. They did not prevent an increase in H2O2 content but flowers in preservatives generally had higher catalase activity than in the control. As solutions with NS produced comparable or even better results than 8-HQC, we recommend the latter as a component of a preservative for cut peony flowers. However, cultivar-specific responses indicate that postharvest treatments must be individually tailored to each cultivar.
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Claims 13
Claim · model-written summary
Preservative responses varied by cultivar and treatment.
- Outcome
- Responsese0
Not reportedTaxon
Verbatim
e0“Responses varied both by cultivar and treatment.”
Claim · model-written summary
Preservatives extended vase life in five cultivars.
Not reportedComparator
Verbatim
e0“The preservatives extended the vase life in only five cultivars”
t0“Peony Flowers”
Claim · model-written summary
Preservatives increased flower diameter and improved appearance in nine cultivars.
- Taxon
- Peonyt0
- Treatment
- preservativese0
- Outcome
- flower diameter and improved the general flower appearancee0
- Direction
- increasede0
- Value
- nine cultivarse0
Not reportedComparator
Verbatim
e0“in nine cultivars, preservatives increased the flower diameter and improved the general flower appearance”
t0“Peony Flowers”
Claim · model-written summary
Xylem blockages appeared soon after harvest.
Verbatim
e0“Blockages in xylem vessels started to appear soon after harvest.”
t0“Peony Flowers”
Claim · model-written summary
Nanosilver with sucrose prevented tylose formation.
Not reportedComparator
Verbatim
e0“Both NS and 8-HQC with sucrose prevented tylose formation”
t0“Peony Flowers”
Claim · model-written summary
8-HQC with sucrose prevented tylose formation.
Not reportedComparator
Verbatim
e0“Both NS and 8-HQC with sucrose prevented tylose formation”
t0“Peony Flowers”
Claim · model-written summary
Nanosilver reduced bacterial blockages.
Not reportedComparator
Verbatim
e0“bacterial blockages were reduced only by the NS solution”
t0“Peony Flowers”
Claim · model-written summary
Reduced stem blockage did not improve water balance or longevity.
Verbatim
e0“Reduction in stem blockages did not translate into better water balance or flower longevity.”
t0“Peony Flowers”
Claim · model-written summary
Petal carbohydrate accumulation was highest with nanosilver.
- Taxon
- Peonyt0
- Organ / stage
- petalse0
- Treatment
- NS solutione0
- Outcome
- carbohydrate accumulatione0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“The highest carbohydrate accumulation in petals was observed in the NS solution.”
t0“Peony Flowers”
Claim · model-written summary
Preservatives mitigated the increase in free amino acids, including proline.
- Taxon
- Peonyt0
- Treatment
- Preservativese0
- Outcome
- rise in free amino acids, including free prolinee0
- Direction
- mitigatede0
Not reportedComparator
Verbatim
e0“Preservatives mitigated the rise in free amino acids, including free proline.”
t0“Peony Flowers”
Claim · model-written summary
Preservatives did not prevent H2O2 content from increasing.
Not reportedTreatmentComparator
Verbatim
e0“They did not prevent an increase in H2O2 content”
t0“Peony Flowers”
Claim · model-written summary
Preserved flowers generally had higher catalase activity than controls.
Verbatim
e0“flowers in preservatives generally had higher catalase activity than in the control”
t0“Peony Flowers”
Claim · model-written summary
Authors recommend cultivar-specific postharvest treatments.
Verbatim
e0“postharvest treatments must be individually tailored to each cultivar”
t0“Peony Flowers”