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Life Cycle and Genetic Diversity of Symplocarpus nipponicus (Araceae), an Endangered Species in Japan.
Plants (Basel, Switzerland) 2018 September 12
Symplocarpus nipponicus , a member of the Araceae family, is an endangered plant in several prefectures in Japan. For the conservation of this wild species, we investigated the morphology, life cycle, and genetic diversity of three wild populations. By fixed-point observation over several years, we found that it takes at least four years for the plant to set the inflorescences consisting of spadices and spathes, and another two years for it to set mature seeds. To examine the genetic diversity in the wild population, we developed 11 novel microsatellite markers and investigated the genetic variation in three populations in Kyoto Prefecture: Ayabe, Hanase, and Momoi. The Ayabe population carried less genetic variation than the other two areas, suggesting the isolation of the habitat and thus a higher risk of extinction. Our results provide basic knowledge of the ecological aspects of S. nipponicus , as well as molecular techniques for the assessment of its genetic diversity, and thus are useful for the conservation of this endangered species.
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