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갈조류 감태 (Ecklonia cava Kjellman)의 대량양식을 위한 가이식 및 양성 조건
황은경,공용근,하동수,박찬선 한국수산과학회 2010 한국수산과학회지 Vol.43 No.6
The mass cultivation of Ecklonia cava Kjellman was studied as a potential biomass source for the extract industry in Korea. Experiments were conducted to investigate the optimal conditions for artificial seed production and mass cultivation of this species. Maximum growth and young thalli development in the nursery culture area occurred at 2 m depth, whereas maximum growth of thalli in the main culture area occurred at 1 m depth. Production of E. cava was between 2.6 and 3.6 kg wet wt. m-1 after depth control and removal of fouling organism, etc. The relationship between optimal water depth for culture and underwater irradiance during the E. cava cultivation was calculated as: y = -0.718x + 8.042 (r2=0.976). The growth rates achieved in this trial indicate that E. cava cultures could produce and supply sufficient biomass.
김영대,공용근,전창영,송홍인,박미선,이채성,유현일,김영환 한국수산과학회 2010 한국수산과학회지 Vol.43 No.5
Seaweed biomass was estimated in the rocky subtidal zone of Daejin on the mid-east coast of Korea using a destructive sampling method from February to November 2007. Monthly sampling was conducted at depths of 5, 10 and 15 m using 50 × 50 cm quadrats. A total of 73 species, including 5 chlorophytes, 25 phaeophytes, 43 rhodophytes and one seagrass were identified. Average seaweed biomass was 2,852.3 g wet wt. m-2 and biomass values varied monthly from 1,189.8 g to 7,523.7 g. The species dominant in biomass were Laminaria japonica (481.7 g), Sargassum confusum (470.85 g), Undaria pinnatifida (422.57 g), Costaria costata (282.16 g), Odonthalia corymbifera (174.46 g), S. sagamianum (163.22 g) and S. horneri (122.18 g). The vertical distribution of algae was characterized by S. confusum and U. pinnatifida at 5 m, L. japonica and U. pinnatifida at 10 m, and O. corymbifera and L. japonica at 15 m depth. The C/P, R/P and (R+C)/P values were 0.20, 1.72 and 1.92, respectively.
해산 녹조류 참홑파래, Monostroma nitidum의 원형질체 분리와 분화
조용철,공용근,윤장택,선상미,정규화,CHO Yong Chul,GONG Yong Gun,YOON Jang-Taek,SUN Sang-Mi,CHUNG Gyu-Hwa 한국수산과학회 1999 한국수산과학회지 Vol.32 No.1
해산 녹조류 참흩파래, Monostroma nitidum의 엽체를 효소처리하여 다량의 원형질체를 분리하였다. 최적 효소액의 조합은 $4\%$ R-10+$3\%$ Macerozyme R-10+$3\%$ Abalone acetone power로서 생체조직 300mg 당 $4.41\times10^6$개의 원형질체가 분리되었다. 원형질체의 수율은 효소처리 270분에 최대였다. 분리 직후의 원형질체는 구형으로 직경 $13\~33\mu$m의 크기였다. 분리된 원형질체는 0.4M mannitol을 함유한 f/2배지에서 배양한 후 매주 mannitol이 함유되지 않은 f/2 배지로 절반씩 교환함으로서 분화율을 높일 수 있었다. f/2배지를 사용한 적정 배양조건에서 원형질체는 배양 3일 후 새로운 세포벽을 형성하였으며 10일 후 발아하기 시작하여 엽체로 발달하였다. 항생물질의 배지내 첨가는 배양체의 분화를 저해하였다. High yields of protoplasts were obtained following enzymatic digestion of the vagetative thalli of marine green alga Monostroma nitidum. The enzyme mixtures containing $4\%$ Cellulase R-10+$3\%$ Macerozyme R-10+$3\%$ Abalone acetone power produced $4.41\times10^6$ protoplasts per 300 mg of fresh tissue. The highest yield of protoplasts was obtained by 270 minutes treatment of the thalli in enzyme solution. Freshly isolated protoplasts were spherical in shape and ranged between $13\~33\mu$m in diameter. The high efficiency of differentiation were obtained by incubating freshly isolated protoplasts in 0.4 M mannitol f/2 medium for 7 days and then transferring to 0.2 M mannitol f/2 medium. Protoplasts began to form new cell walls three days after initial culture and began to germinate after 10 days, and then form a leafy thallus after further culture in f/2 medium. The addition of antibiotics in media inhibited the differentiation of protoplasts in culture.
대형갈조류 곰피 (Ecklonia stolonifera Okamura) 유리배우체의 재생 및 성숙 유도
황은경,공용근,하동수,박찬선 한국수산과학회 2010 한국수산과학회지 Vol.43 No.3
The Induction of regeneration and maturation in the free-living gametophytes of Ecklonia stolonifera Okamura was studied at four temperatures (5, 10, 15, and 20℃), four levels of irradiance (5, 10, 20, and 40 μmol m-2 s-1) and three photoperiods (14:10, 12:12, and 10:14 h L:D). Female gametophyte fragments were maintained in active regeneration without reaching sexual maturity under 5~10℃, 10 μmol m-2 s-1, 10:14 h (L:D), whereas the conditions for male gametophytes were slightly different at 20℃, 40 μmol m-2 s-1, 10:14 h (L:D). The sexual maturation of female and male gametophytes was facilitated at 15℃, 20 μmol m-2 s-1, 14:10 h (L:D). These results provide basic information for controlling the regeneration and maturation of the free-living gametophytes for artificial seed production of E. stolonifera.
제주도에 서식하는 보호대상 해조류 넓미역의 생태학적 특성: 생장 및 성숙
황은경,공용근,박찬선 한국수산과학회 2010 한국수산과학회지 Vol.43 No.1
Ecological characteristics of Undariopsis peterseniana, an endangered brown alga, were investigated from January to December 2007 at Jeju Island, Korea. The U. peterseniana population formed dense patches at depths of 12~17 m depth. Growth in length of the alga reached a maximum of 168±36cm at June. Sorus were observed from May to August, and a maturation peak was detected in June, when bottom seawater temperatures were around 18℃. After zoospore release, the alga bleached and disappeared after August. Developmental initiation of sporophytes occurred at temperature above 15℃, and sorus formation required approximately 236 degree-days. This is the first study to examine a U. peterseniana population throughout the entire year in a natural habitat.