Pre- and post-harvest influences on seed dormancy status of an Australian Goodeniaceae species, Goodenia fasciularis

Hoyle, Gemma L., Steadman, Kathryn J., Daws, Matthew, I. and Adkins, Steve W. (2008) Pre- and post-harvest influences on seed dormancy status of an Australian Goodeniaceae species, Goodenia fasciularis. Annals of Botany, 102 1: 93-101. doi:10.1093/aob/mcn062


Author Hoyle, Gemma L.
Steadman, Kathryn J.
Daws, Matthew, I.
Adkins, Steve W.
Title Pre- and post-harvest influences on seed dormancy status of an Australian Goodeniaceae species, Goodenia fasciularis
Formatted title
Pre- and post-harvest influences on seed dormancy status of an Australian Goodeniaceae species, Goodenia fasciularis
Journal name Annals of Botany   Check publisher's open access policy
ISSN 0305-7364
Publication date 2008-04-21
Year available 2008
Sub-type Article (original research)
DOI 10.1093/aob/mcn062
Open Access Status DOI
Volume 102
Issue 1
Start page 93
End page 101
Total pages 9
Place of publication Oxford, U.K.
Publisher Oxford University Press
Language eng
Subject C1
961205 Rehabilitation of Degraded Mining Environments
060705 Plant Physiology
0607 Plant Biology
Abstract Background and Aims The period during which seeds develop on the parent plant has been found to affect many seed characteristics, including dormancy, through interactions with the environment. Goodenia fascicularis (Goodeniaceae) seeds were used to investigate whether seeds of an Australian native forb, harvested from different environments and produced at different stages of the reproductive period, differ in dormancy status.
Formatted abstract
Background and Aims:
The period during which seeds develop on the parent plant has been found to affect many seed characteristics, including dormancy, through interactions with the environment. Goodenia fascicularis (Goodeniaceae) seeds were used to investigate whether seeds of an Australian native forb, harvested from different environments and produced at different stages of the reproductive period, differ in dormancy status.
Methods
:
During the reproductive phase, plants were grown ex situ in warm (39/21 °C) or cool (26/13 °C) conditions, with adequate or limited water availability. The physiological dormancy of resulting seeds was measured in terms of the germination response to warm stratification (34/20 °C, 100 % RH, darkness).
Key Results:

Plants in the cool environment were tall and had high above-ground biomass, yet yielded fewer seeds over a shorter, later harvest period when compared with plants in the warm environment. Seeds from the cool environment also had higher viability and greater mass, despite a significant proportion (7 % from the cool-wet environment) containing no obvious embryo. In the warm environment, the reproductive phase was accelerated and plants produced more seeds despite being shorter and having lower above-ground biomass than those in the cool environment. Ten weeks of warm stratification alleviated physiological dormancy in seeds from all treatments resulting in 80–100 % germination. Seeds that developed at warm temperatures were less dormant (i.e. germination percentages were higher) than seeds from the cool environment. Water availability had less effect on plant and seed traits than air temperature, although plants with reduced soil moisture were shorter, had lower biomass and produced fewer, less dormant seeds than plants watered regularly.
Conclusions:
Goodenia fascicularis seeds are likely to exhibit physiological dormancy regardless of the maternal environment. However, seeds collected from warm, dry environments are likely to be more responsive to warm stratification than seeds from cooler, wetter environments. 
Keyword Goodenia fascicularis
Goodeniaceae
Australia
Pysiological dormancy
Seeds
Temperature
Soil moisture
Maternal influence
Climate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Agriculture and Food Sciences
School of Pharmacy Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 08 Apr 2009, 02:31:12 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences