
TY  - JOUR
A1  - Peishi, Zalynn 
A1  - Plummer, Julie A. 
A1  - Bell, David T. 
A1  - Turner, David W. 
A1  - Choengsaat, D. 
T1  - Low- and High-temperature Storage Effects on Viability and Germinability of Seeds of Three Australian Asteraceae
JF  - Australian Journal of Botany
JO  - Aust. J. Bot.
Y1  - 1999
VL  - 47
IS  - 2
SP  - 265
EP  - 275
KW  - 
UR  - https://doi.org/10.1071/BT97105 
N2  - Commercialisation of many Australian everlasting daisy (Asteraceae) species islimited by poor germination, due in part to dormancy. This study examined theeffect of storage temperatures of 5, 15, 25 and 38&#176;C on seed viability andgerminability of Schoenia filifolia subsp.subulifolia, Rhodanthe chlorocephala subsp.rosea and an unnamed species ofCraspedia. Short-term storage (&#60; 18 months) at cooltemperatures increased seed moisture content, reduced viability and did notpromote germination. However, storage at high temperatures decreased seedmoisture content, maintained viability and improved germination. In tests oflong-term (&#62; 24 months) storage in ambient conditions, both viability andgerminability declined in cohorts of Schoenia andRhodanthe. Detailed tests on 8-month-old seeds ofSchoenia revealed that dormancy was not due tomechanical barriers, as scarification did not improve germination. However,gibberellic acid (GA3) and KNO3applications overcame the dry-storage requirement to break dormancy in thisspecies. High-temperature, dry storage is an important treatment to breakdormancy for planting arid-zone Asteraceae seeds of less than 6 months of age. 
ER  -

