ISHS Acta Horticulturae 272: Symposium on Bedding and Pot Plant Culture
PHOTOPERIODIC RESPONSE OF SISYRINCHIUM BERMUDIANA L. - A POSSIBLE NEW BEDDING PLANT |
| Author: | G.L. Roberts |
| Abstract:
Sisyrinchium bermudiana L. is a member of the Iridaceae family and is a perennial plant endemic to Bermuda (zone 8). The plant flowers in its first season from seed and the bright blue flowers make it a potential bedding plant. In order to establish recommended environments for greenhouse production, a series of experiments are being conducted to study the growth, development and flowering of Sisyrinchium bermudiana as influenced by environmental factors. The objective of this study was to investigate the photoperiodic response of S. bermudiana relative to flower induction. Seeds were collected in Bermuda and stored in the dark until needed. They were germinated at 21°C day temperature and a 16°C night temperature. The photoperiod regimes during the entire germination to growth stages were 10 hours for the short day treatment and 14 hours for the long day treatment. After a germination period of 3 weeks, temperatures in all chambers were raised to 28°C during the day and 23°C during the night. Plants were grown with irradiation of 350 μmolm-2s-1 PAR. It was established that S. bermudiana is a short day plant for flowering. | |
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