Abstract
Larix species (or larch) are widely distributed in the cold temperate climate of the Northern Hemisphere (Table 1). Ten species are generally recognized (Boyle et al. 1989) that grow in a number of drastically different environments (Burns and Honkala 1990). For instance, Larix laricina grows in a cold climate on soil with high moisture and acidity. Larix lyallii grows on high mountains in a snowy and cold climate on dry, rocky, and acidic soils. In contrast, L. occidentalis grows in a milder climate on good soils. Larches have a relatively good annual net carbon gain and high growth rate due to their more efficient use of nutrients (Gower and Richards 1990). They have good wood quality and rotting resistance, which makes them suitable for the lumber industry (New Brunswick Forest Research Advisory Committee 1986), but their use is limited by their availability. Biologically, Larix species are interesting because of their potential for interspecific hybridization and their deciduous habit as conifers. Natural hybrids such as Larix leptolepis × Larix decidua and its reciprocal have demonstrated hybrid vigor (Boyle et al. 1989). For more information on various aspects of Larix see Chalupa (1991) and Karnosky (1992).KeywordsSomatic EmbryoSomatic EmbryogenesisEmbryogenic TissueProtoplast IsolationTransient Gene ExpressionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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