**Cryopreserving Vegetatively Propagated Tropical Crops – The Case of** *Dioscorea*  **Species and** *Solenostemon rotundifolius*

Marian D. Quain1, Patricia Berjak2, Elizabeth Acheampong3 and Marceline Egnin4 *1Council for Scientific and Industrial Research Crops Research Institute 2School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville Campus, Durban 3Tissue Culture Laboratory, Department of Botany, University of Ghana, Legon, Accra 4Plant Biotechnology and Genomics Research Laboratory, Tuskegee University 1,3Ghana 2South Africa 4USA* 
