Abstract
One of the major postharvest problems of cut tulip flowers is their stem curvature when placed in a horizontal orientation during transport or in flower arrangements. The Ca 2+ channel blocker LaCl3 (lanthanum chloride) was tested for prevention of stem bending in cut tulip flowers. Our results indicate that stem bending varies with cultivar and is positively correlated with postharvest stem elongation rate. LaCl3 prevented stem bending by reducing stem elongation. However, LaCl3 treated flower stems failed to maintain straight stems when positioned vertically. Further, the gravitropic response of the tested cultivars varied with growing conditions, implying significant environmental effects on this response. LaCl3 did not affect stem bending during simulated dry transport (3 days, 5 °C and 95 % RH), but cold-stored flowers exhibited less bending compared to fresh flowers held at room temperature. Further, flower longevity was reduced 20 to 40 % by the LaCl3 treatment with or without simulated transport. Consequently, LaCl3 would not be useful to prevent stem bending of cut tulip flowers in commercial horticultural practice.
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Claims 10
Claim · model-written summary
Stem bending varied with cultivar.
Not reportedDirection
Verbatim
e0“stem bending varies with cultivar”
t0“tulip”
Claim · model-written summary
Stem bending was positively correlated with postharvest stem elongation rate.
Verbatim
e0“positively correlated with postharvest stem elongation rate”
t0“tulip”
Claim · model-written summary
LaCl3 prevented stem bending.
Not reportedComparator
Verbatim
e0“LaCl3 prevented stem bending by reducing stem elongation”
t0“tulip”
Claim · model-written summary
LaCl3 reduced stem elongation.
Not reportedComparator
Verbatim
e0“LaCl3 prevented stem bending by reducing stem elongation”
t0“tulip”
Claim · model-written summary
LaCl3-treated stems failed to remain straight when placed vertically.
Not reportedDirection
Verbatim
e0“LaCl3 treated flower stems failed to maintain straight stems when positioned vertically”
t0“tulip”
Claim · model-written summary
Gravitropic response varied among cultivars with growing conditions.
Not reportedDirection
Verbatim
e0“the gravitropic response of the tested cultivars varied with growing conditions”
t0“tulip”
Claim · model-written summary
LaCl3 did not affect bending during simulated dry transport.
- Taxon
- tulipt0
- Treatment
- LaCl3e0
- Outcome
- stem bendinge0
- Direction
- did not affecte0
- Qualifier
- simulated dry transport (3 days, 5 °C and 95 % RH)e0
Not reportedComparator
Verbatim
e0“LaCl3 did not affect stem bending during simulated dry transport (3 days, 5 °C and 95 % RH)”
t0“tulip”
Claim · model-written summary
Cold-stored flowers bent less than fresh flowers held at room temperature.
Verbatim
e0“cold-stored flowers exhibited less bending compared to fresh flowers held at room temperature”
t0“tulip”
Claim · model-written summary
LaCl3 reduced flower longevity by 20 to 40% with or without simulated transport.
Not reportedComparator
Verbatim
e0“flower longevity was reduced 20 to 40 % by the LaCl3 treatment with or without simulated transport”
t0“tulip”
Claim · model-written summary
The authors conclude LaCl3 is not useful commercially to prevent cut-tulip stem bending.
Verbatim
e0“LaCl3 would not be useful to prevent stem bending of cut tulip flowers in commercial horticultural practice”