Vernalization promotes flowering of a heat tolerant Calandrinia while long days replace vernalization for early flowering of Brunonia

Cave, RL and Johnston, ME (2010) Vernalization promotes flowering of a heat tolerant Calandrinia while long days replace vernalization for early flowering of Brunonia. Scientia Horticulturae, 123 3: 379-384. doi:10.1016/j.scienta.2009.10.004


Author Cave, RL
Johnston, ME
Title Vernalization promotes flowering of a heat tolerant Calandrinia while long days replace vernalization for early flowering of Brunonia
Formatted title
Vernalization promotes flowering of a heat tolerant Calandrinia while long days replace vernalization for early flowering of Brunonia
Journal name Scientia Horticulturae   Check publisher's open access policy
ISSN 0304-4238
Publication date 2010-01-04
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.scienta.2009.10.004
Volume 123
Issue 3
Start page 379
End page 384
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2011
Language eng
Formatted abstract
The flowering responses of Brunonia australis (blue pincushion) and Calandrinia sp. to vernalization, photoperiod, temperature and plant age were investigated to provide a foundation for manipulating flowering in these potential potted plants. Plants were vernalized at 4.8 °C for 0, 3 or 6 weeks at the plant age of 1-4 or 8-14 leaves. Following vernalization, plants were grown at 25/10 or 35/20 °C (day/night) under short days (11 h, ambient daylight averaged 380 ± 44 μmol m-2 s-1) or long days (16 h) provided by an additional 5 h night break (21:00-2:00 h at <4.5 μmol m-2 s-1 from incandescent lamps), for 85 days. This is the first work to investigate flowering of these ornamental species. Both species showed enhanced flowering following vernalization and a quantitative requirement for long days. The reduction of the time until the first visible inflorescence (Brunonia) or flower (Calandrinia) buds by 8-13 days was affected by vernalization for 3 or 6 weeks, respectively. Long days were effective for reducing the time to first visible floral bud and increasing the number of inflorescence or flowers per plant for both species. For Brunonia, LDs replaced vernalization when applied to plants with 1-4 leaves. Raising temperature from 25/10 to 35/20 °C increased the number of flowers per plant of Calandrinia by 2-2.5-fold for plants with 1-4 or 8-14 leaves respectively.
© 2009 Elsevier B.V. All rights reserved.
Keyword Australian species
Ornamental
Flowering
Photoperiod
Daylength
Temperature
Heat tolerance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 11 November 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Agriculture and Food Sciences
 
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Created: Sun, 14 Feb 2010, 00:00:27 EST