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소백산국립공원 아고산지역 모데미풀 (Megaleranthis saniculifolia Ohwi, Ranunculaceae)의 교배체제와 개화특성 KCI 등재

Mating Systems and Flowering Characteristics of Megaleranthis saniculifolia Ohwi in a Subalpine Zone of Sobaeksan National Park.

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  • URLhttps://db.koreascholar.com/Article/Detail/328277
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생태와 환경 (Korean Journal of Ecology and Environment)
초록

Alpine plants with a scarcity of pollinators in harsh environments have been believed to undergo selfing for reproductive assurance; however, contradictory evidence is also available. Snowmelt regimes in alpine areas function to change life history characteristics of alpine plants such as flowering time and duration; yet the effects of snowmelt regimes have never been tested in alpine plants in Korea. This study was conducted to investigate the dichogamy, mating systems, and flowering characteristics of Megaleranthis saniculifolia populations [early and late snowmelt plots (ESP and LSP, respectively)] in a subalpine area of Sobaeksan Mountain in Korea. M. saniculifolia exhibited incomplete protogyny in that despite early maturation of pistils, maturation times of pistils and stamens within flowers were partly overlapped. Control and hand-outcrossing treatments produced significantly higher number of follicles and seeds per flower than autonomous and handselfing treatments. Based on the aggregate fruit set, the auto-fertility index (AI) and self-compatibility index (SI) were 0.33 and 0.50, respectively. Snowmelt occurred 10 days earlier in ESP than in LSP, thereby ESP and LSP showed distinct differences with regard to flower longevity and season, but showing no difference in peak flowering dates. We concluded that M. saniculifolia is an incomplete protogynous and largely outcrossing plant requiring pollinator service. Temporal variation in snowmelt time and subsequent changes in flowering characteristics under climate change may further threaten the population persistence of M. saniculifolia which has already been designated as endangered species in Korea.

저자
  • 이학봉 | Hakbong Lee
  • 이혜선(성신여자대학교 자연과학대학 생명과학·화학부) | Hyeseon Lee (School of Biological Sciences and Chemistry, Sungshin University, Seoul, Republic of Korea)
  • 강혜순 | Hyesoon Kang Corresponding author