Juvenility and flowering of Brunonia australis (Goodeniaceae) and Calandrinia sp (Portulacaceae) in relation to vernalization and daylength

Cave, Robyn L., Birch, Colin J., Hammer, Graeme L., Erwin, John E. and Johnston, Margaret E. (2011) Juvenility and flowering of Brunonia australis (Goodeniaceae) and Calandrinia sp (Portulacaceae) in relation to vernalization and daylength. Annals of Botany, 108 1: 215-220. doi:10.1093/aob/mcr116


Author Cave, Robyn L.
Birch, Colin J.
Hammer, Graeme L.
Erwin, John E.
Johnston, Margaret E.
Title Juvenility and flowering of Brunonia australis (Goodeniaceae) and Calandrinia sp (Portulacaceae) in relation to vernalization and daylength
Formatted title
Juvenility and flowering of Brunonia australis (Goodeniaceae) and Calandrinia sp (Portulacaceae) in relation to vernalization and daylength
Journal name Annals of Botany   Check publisher's open access policy
ISSN 0305-7364
1095-8290
Publication date 2011-07
Sub-type Article (original research)
DOI 10.1093/aob/mcr116
Volume 108
Issue 1
Start page 215
End page 220
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2012
Language eng
Formatted abstract
Background and Aims The time at which plants are transferred to floral inductive conditions affects the onset of flowering and plant morphology, due to juvenility. Plants of Brunonia australis and Calandrinia sp. were used to investigate whether Australian native ephemeral species show a distinct juvenile phase that can be extended to increase vegetative growth and flowering.
Methods The juvenile phase was quantified by transferring seedlings from less inductive (short day and 30/20°C) to inductive (vernalization or long day) conditions at six different plant ages ranging from 4 to 35 d after seed germination. An increase in days to first visible floral bud and leaf number were used to signify the end of juvenility.
Key Results Brunonia australis was receptive to floral inductive long day conditions about 18–22 d after seed germination, whereas plants aged 4–35 d appeared vernalization sensitive. Overall, transferring plants of B. australis from short to long day conditions reduced the time to anthesis compared with vernalization or constant short day conditions. Calandrinia sp. showed a facultative requirement for vernalization and an insensitive phase was not detected. Floral bud and branch production increased favourably as plant age at time of transfer to inductive conditions increased. Younger plants showed the shortest crop production time.
Conclusions Both species can perceive the vernalization floral stimulus from a very young age, whereas the photoperiodic stimulus is perceived by B. australis after a period of vegetative growth. However, extending the juvenile phase can promote foliage development and enhance flower production of both species.
Keyword Brunonia australis
Calandrinia sp.
Juvenility
Flowering
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Agriculture and Food Sciences
 
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Created: Fri, 10 Feb 2012, 14:40:51 EST by Professor Graeme Hammer on behalf of School of Agriculture and Food Sciences