Plant growth regulators and flowering of Brunonia and Calandrinia sp.

Wahyuni, S., Krisantini, S. and Johnston, M. E. (2011) Plant growth regulators and flowering of Brunonia and Calandrinia sp.. Scientia Horticulturae, 128 2: 141-145. doi:10.1016/j.scienta.2011.01.004


Author Wahyuni, S.
Krisantini, S.
Johnston, M. E.
Title Plant growth regulators and flowering of Brunonia and Calandrinia sp.
Formatted title
Plant growth regulators and flowering of Brunonia and Calandrinia sp.
Journal name Scientia Horticulturae   Check publisher's open access policy
ISSN 0304-4238
Publication date 2011-03-18
Sub-type Article (original research)
DOI 10.1016/j.scienta.2011.01.004
Open Access Status
Volume 128
Issue 2
Start page 141
End page 145
Total pages 5
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Brunonia australis R. Br (Goodeniaceae) and Calandrinia (Portulacaceae), native to Australia, are potential new flowering potted plants. This research investigated the role of daylength and growth regulators, Gibberellic acid (GA3) and paclobutrazol (Pac), to control vegetative growth, peduncle elongation and flowering of Brunonia and Calandrinia. Plants were grown under long days (16h), short days (11h) and 8 weeks under short day then transferred to long day (SDLDs). Plants in each daylength were treated with GA3, Pac, and GA3+ Pac. GA3  was applied as 10μL drop of 500mgL-1 concentration to the newest mature leaf. A single application of Pac was applied as a soil drench at 0.25mg a.i. dose per plant. Both Brunonia and Calandrinia flowered earlier in long days but still flowered in short days, so both can be classified as facultative LD plants. Brunonia under SDLDs were more vigorous and attractive than plants under LDs while still being more compact than plants under SDs. In Brunonia, GA3 promoted earlier flowering and increased the number of inflorescences under SDs. Pac at 0.25mg a.i. per plant applied alone or in combination with GA3 had extended flower development in Brunonia, and resulted in a reduced number of inflorescences per plant compared to the control plants. Vegetative growth of Calandrinia was similar under LDs, SDs and SDLDs, whereas GA3 application increased plant size. Pac-treated Calandrinia looked compact and attractive, and Pac application did not affect time to flower and flower number.
Keyword Australian native species
Gibberellic acid
Growth regulator
Paclobutrazol
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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