Conservation of the endangered annual plant, Mitrasacme pygmaea R. Brown (Loganiaceae) : life history, ecology, germination traits and genetic diversity

2015 Fiscal Year Final Research Report

• Project/Area Number: 25440237
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Osaka Kyoiku University
• Principal Investigator: Okazaki Junko 大阪教育大学, 教育学部, 准教授 (20195332)
• Co-Investigator(Kenkyū-buntansha): UEMATSU Chiyomi 大阪市立大学, 理学研究科, 講師 (30232789) ; YAMASHITA Jun 岡山大学, 資源植物科学研究所, 助教 (20432627)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 保全 / 光発芽種子 / アイナエ / 光環境 / 自動自家受粉 / 絶滅危惧種 / マチン科 / 植物園

Outline of Final Research Achievements

To conserve the natural populations of the endangered annual plant, Mitrasacme pygmaea R. Brown (Loganiaceae) grown at Botanical Garden，Osaka City University, we investigated its distribution, the life histories, the environmental conditions suitable for the growth, the breeding system and the genetic diversity. As a result, we found three more localities the plants were distributed in Osaka pref. And its seedlings appeared at the end of May and flowering began in August. The seeds of the plant revealed to be photoblastic and the enough light intensity were necessary for the germination and growth. They were self-compatible and produced seeds mainly through self-pollination. We could not detect the geographical genetic structures among eight populations examined. We concluded that the maintenance of enough light conditions and proper weeding time and frequencies corresponding to the growth stages would be the most effective for the conservation of this plant.

Free Research Field

生物学