Heat pre-treatment and the germination of soil- and canopy-stored seeds of south-western Australian species

摘要: Abstract The role of heat (shock) in stimulating the germination soil-stored hard seeds from fire-following species is well known. However, effects high temperatures on canopy-stored (serotinous) are less understood. In this study, we examined effect shock at four (60, 80, 100 and 120 °C) applied for 10 min ten co-occurring Western Australian (five hardseeded, five serotinous). Unlike previous studies, distinguished between rate, as total seedling emergence. comparison with unheated controls, a pulse one or more increased rate three hardseeded ( Acacia pulchella , Daviesia cordata Trymalium ledifolium ). precise pattern response D. was influenced by whether rate. Germination serotinous Calothamnus quadrifidus Hakea species) unaffected pre-treatments above-ambient temperatures. Only Allocasuarina humilis displayed both higher Our results show that some may respond favourably to, least be by, passage fire.