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Effects of Environmental Factors on the Growth of Gametophytes and Young Sporophytes of Eisenia bicyclis (Kjellman) Setchell

대황(Eisenia bicyclis) 배우체와 아포체의 생장에 미치는 환경 인자의 영향

  • Lee, Min-Jeong (Institute of Marine Industry, Gyeongsang National University) ;
  • Kim, Nam-Gil (Department of Marine Biology and Aquaculture, Gyeongsang National University)
  • 이민정 (경상대학교 해양산업연구소) ;
  • 김남길 (경상대학교 해양생명과학과)
  • Received : 2020.12.09
  • Accepted : 2020.12.21
  • Published : 2020.12.31

Abstract

Eisenia bicyclis, a perennial macroalga is a primary producer of in the ocean, It has been identified as a key species that plays a vital role in maintaining the ecosystem stability. Also, it is an important target in marine afforestation projects and useful marine organisms. In addition, E. bicyclis is used as a health food for humans. This study investigated the effect of water temperature, light (photon irradiance), and duration of light (photoperiod) on the growth of gametophytes and young sporophytes of E. bicyclis. The germination and growth of the zoospores of E. bicyclis were examined at five temperatures (5℃, 10℃, 15℃, 20℃ and 25℃), four intensities of photon irradiance (10, 20, 40, and 80 μmol m-2s-1), and photoperiods (14:10 and 10:14 light/dark cycles). The zoospores released from mature plant germinated into the gametophytes under all experimental conditions. The gametophytes were able to grow at water temperature 5℃-25℃ and mature at 10℃-20℃. The optimal range of water temperature for the maturation of the gametophyte was 15℃-20℃. At 25℃, E. bicyclis gametophytes grew rapidly but did not mature. The optimal culture conditions for the growth of young sporophytes grew slowly in low temperature and photon irradiances.

Keywords

References

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