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Propagation and Genetic Variability of Corynanthera Flava, an Endemic Yellow-flowering Myrtle

出版	Curtin University of Technology., 2003
URL	http://books.google.com.hk/books?id=m8-vtgAACAAJ&hl=&source=gbs_api

註釋Populations of the endemic yellow-flowered small myrtle, Corynanfhera flava, are distributed in an elliptical area spanning 70 km from Tathra National Park to Watheroo National Park, about 200 km north of Perth, Western Australia, with plant densities ranging from sparse to locally abundant. Flower stems of this wildflower are a premium in export but stems can only be picked under licence on private properties. The efficacy of several conventional and in vitro propagation techniques was investigated. Propagation from seed is feasible but requires imbibition in diluted (10%) smoke water for 12 - 18 hours as a pre-treatment. Stem cuttings provide a simple technique for cloning but source plants should be selections with proven good rooting response. Tissue culture propagation involving either micropropagation or somatic embryogenesis is proving problematic: despite cultural and nutritional modifications, no rooted tissue cultured plantlet survived after deflasking and this could be ascribed to loss of regulatory function of stomates and thinness of leaf cuticle. Genetic variability of C. jlavu appears to be very high within populations but weakly differentiated among populations. The large genetic dissimilarity between neighbouring plants and variability in propagation response among sibs suggests that C. jlavu is an outcrossing species. This study has provided useful information on possible avenues for domesticating C. flava. Although limited, the genetic data can contribute to the management and conservation of this horticulturally-valuable and unique wildflowers. ¹