Ex-situ Seed Conservation of Endangered Key Tree Cactus (Pilosocereus robinii)Ana Salazar*, Joyce Maschinski and Devon Powell
Fairchild Tropical Botanic Garden, Kushlan Tropical Science Institute, Coral Gables, Florida, USA
- *Corresponding Author:
- Ana Salazar
Fairchild Tropical Botanic Garden
Kushlan Tropical Science Institute
Coral Gables, Florida, 33156, USA
E-mail: [email protected]
Received Date: August 14, 2013; Accepted Date: September 16, 2013; Published Date: September 25, 2013
Citation: Salazar A, Maschinski J, Powell D (2013) Ex-situ Seed Conservation of Endangered Key Tree Cactus (Pilosocereus robinii). J Biodivers Endanger Species 1:111. doi:10.4172/2332-2543.1000111
Copyright: © 2013 Salazar A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Ex-situ seed collections are fundamental to the conservation of threatened and endangered plant species. We tested whether or not seeds of the U.S. endangered tree cactus, Pilosocereus robinii, withstand orthodox storage conditions of low humidity (25%RH) and freezing temperatures (-20°C). Mean final germination of fresh seeds and seeds stored under low humidity and low temperature for 1 and 28 weeks ranged from 92 to 96%. Mean final germination did not differ significantly across storage conditions. Seed germination rate exhibited small, but significant differences across storage conditions. Seeds stored under dry conditions of low humidity and ambient temperature germinated significantly faster than dry-stored seeds maintained at freezing temperatures and fresh seeds. Because orthodox methods of drying and freezing can be used to store seeds of Pilosocereus robinii, ex-situ seed banking can effectively assist the conservation and regeneration of this endangered species.