Seed storage responses in four species of the threatened genus Ravenea (Arecaceae)
Seeds of four Ravenea (Arecaceae) species were screened for germination and desiccation tolerance. All germinated rapidly at 30°C with mean times to germinate of 12 – 22 d; these times were not a function of seed mass. Similarly, seeds of all species were intolerant of dehydration to c. 5% moisture content. For Ravenea rivularis, the mid-point for desiccation-induced viability loss was c. 22% moisture content (≈70% RH at 20°C). Our results indicate that recalcitrant, type III seed storage responses are common in the genus Ravenea and suggest the need to consider alternative storage methods, such as embryo cryopreservation, for their ex situ conservation.
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Document Type: Research Article
Publication date: July 1, 2006
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