Abstract
We investigated the ethylene sensitivity of the annual herbaceous flowers matricaria, nigella, and silene during winter and examined the effects of various preservatives on their vase life. Ethylene sensitivity was evaluated using ethylene concentrations of 1 and 10 μL·L−1 for 1 and 3 days. The vase life of matricaria ‘Single vegumo’ was unaffected by ethylene. For nigella ‘Miss jekyll’, ethylene had no impact after 1 day of treatment, but after 3 days, the sepals abscised and vase life was shortened, regardless of the concentration. For silene ‘Sakurakomachi’, vase life was shortened after a 1 day treatment with 1 μL·L−1. As preservatives, STS and Misaki Farm, a commercial preservative, were used for pretreatment, and GLA was applied as a posttreatment. Misaki Farm did not have any effect in three varieties. In matricaria, STS had no effect, whereas GLA extended vase life. In nigella, 0.2 mM STS extended vase life, while GLA had no effect. For silene, STS concentrations of ≥0.1 mM caused leaf phytotoxicity, whereas 0.05 mM STS applied for 6 h caused no phytotoxicity and extended vase life. GLA post-treatment was also suggested to further extend vase life.
https://ror.org/05qg1fd04 
