
%0 Journal Article
%A Peishi, Zalynn 
%A Plummer, Julie A. 
%A Bell, David T. 
%A Turner, David W. 
%A Choengsaat, D. 
%T Low- and High-temperature Storage Effects on Viability and Germinability of Seeds of Three Australian Asteraceae
%J Australian Journal of Botany
%D 1999/05/28
%V 47
%N 2
%P 265-275
%K 
%R https://doi.org/10.1071/BT97105
%U https://www.publish.csiro.au/paper/BT97105 
%X 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. 
