Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Ecological Study on the Seaweed Porphyra pseudolinearis Originated from the East Sea, Korea

동해안 고유종 긴잎돌김(Porphyra pseudolinearis)의 생태학적 연구

  • Kim, Young-Dae (Aquaculture Division, East Sea Fisheries Research Institute) ;
  • Lee, Ju (Aquaculture Division, East Sea Fisheries Research Institute) ;
  • Son, Yong-Soo (Aquaculture Division, East Sea Fisheries Research Institute) ;
  • Choi, Jae-Seok (Department of Biotechnology, Pukyong National University) ;
  • Kim, Dong-Sam (Aquaculture Division, East Sea Fisheries Research Institute) ;
  • Hong, Yong-Ki (Department of Biotechnology, Pukyong National University)
  • 김영대 (국립수산과학원 동해수산연구소 양식연구팀) ;
  • 이주 (국립수산과학원 동해수산연구소 양식연구팀) ;
  • 손용수 (국립수산과학원 동해수산연구소 양식연구팀) ;
  • 최재석 (부경대학교 생물공학과) ;
  • 김동삼 (국립수산과학원 동해수산연구소 양식연구팀) ;
  • 홍용기 (부경대학교 생물공학과)
  • Published : 2004.04.01
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Abstract

Growth and sexual differentiation of the seaweed Porphyra pseudolinearis Ueda have been investigated monthly in the intertidal zone of the East Sea, Korea. Young blades of P. pseudolinearis appeared at the beginning of October. Carp os pores were released at the end of November immediately after carposporangia formation. Then the thalli of P. pseudolinearis were extinguished at the end of March. Young thalli were budded through the stages of conchocelis and conchospore. Thalli showed lanceolate type in shape, cordate type in holdfast, absence of microscopic spinulate process and sexual generation. Ratios of length to width in female thalli ranged from 5.6 to 7.4 at the maturation in December and slightly decreased 3.3 to 4.8 in January and 4.9 to 7.3 in December while the ratios of male thalli ranged from 4.2 to 4.8 in January. On October 12, average five individuals were obsered in a quadrate (30 cm ${\times}$ 30 cm), 238$\pm$18 individuals for the maturation stage in December and then it was reduced to 150 individuals in February and 15 individuals in March. Average sex ratios for female, male and vegetative thalli were 31.3% 46.9% and 21.9% respectively in early December, the beginning time of sex maturation. The sex ratio of female and male thalli in December 17, changed to 69.4%, 30.6% respectively.

동해안 고유종인 긴잎돌김의 발생과 성숙, 생활사 등 생태에 관한 연구가 시행되었다. 긴잎돌김은 10월 초순에 발생하여 11월 말경에 성성숙이 시작되어 수정에 의해 과포자낭이 형성되고 과포자가 방출되었다. 3월 말경에 엽체가 소멸되었으며 이후 사상체, 각포자기를 거쳐 10월에 엽체가 발아하였다. 긴잎돌김의 특징으로 엽체는 피침형, 모근은 심장형이 대다수를 차지하였으며 거치상돌기가 없고 유성세대과정을 가지며 선명한 과포자낭무늬를 가진다. 암ㆍ수배우체에 있어 엽체와 엽폭비율은 성성숙기인 12월에 각각 5.6∼7.4 및 4.9∼7.3이였다. 1월에는 3.3∼4.8, 4.2∼4.8이였다. 개체수 변화는 10월 초순에 방형구(30${\times}$30 cm)내에 평균 5개체, 12월에는 238개체, 3월 중순에 15개체로 변화되었다. 성 분화가 시작되는 12월 초순에 암ㆍ수배우체 및 영양세포의 비율은 각각 31%, 47%, 22%였으며 완전 성숙된 12월 중순은 암ㆍ수배우체만 69.4% 및 30.6%였다.

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