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갈조류 톳의 포복지 재활용을 위한 친환경적 해적생물 구제: pH와 염분
황은경,유호창,김세미,유현일,백재민,박찬선 한국환경생물학회 2014 환경생물 : 환경생물학회지 Vol.32 No.4
The brown seaweed Sargassum fusiforme is an edible and highly valued in Korea. During the summer season, phytal organisms graze heavily on young algal blades and holdfastsof the species and substantially reduce harvestable biomass. Here, in this study, we investigated the effects of pH (range: 2~13) and salinity (range: 0~44 psu) on the removal of two major phytal animals, Caprella scaura and Gammaropsis utinomi, associated with S. fusiforme. We also examined the optimum quantum yield (Fv/Fm) of algae in the same experimental conditions to quantify the tolerance of algae to acid and salinity treatments. It was observed that the phytal animals showed more than 80% mortality at pH lower that pH 4 and the extreams of salinity (0~10 psu and 44 psu) after a 5 min of immersion. However, the quantum yield of S. fusiforme was not significantly different from controls within the pH 3~11 range, and the 0~44 psu salinity range. Precisely, if the pH and salinity conditions outside these ranges were used in comercial Sargassum culture, the removal of the animal species would be higher, but with reduced quantum yield of algae. Taken together, our study results indicated that the pH and salinity treatments could allow multiple harvests from the same holdfast of S. fusiforme.
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황은경,유호창,김세미,백재민,박찬선 한국환경생물학회 2015 환경생물 : 환경생물학회지 Vol.33 No.2
본 연구는 다시마 유리배우체의 분리, 재생 및 성숙 유도 조건을 구명하기 위하여, 4개의 온도 조건 (5, 10, 15, 20˚C), 4개의 조도조건 (5, 10, 20, 40 μmol m-2 s-1) 및 3개의 광주기 조건 (14 : 10, 12 : 12, 10 : 14 h L : D)에서 배양을 실시하였다. 다시마 암배우체의 생장은 15˚C, 20 μmol m-2 s-1, 10 : 14 h (L : D)에서 촉진되었으며, 수배우체의 생장은 15˚C, 5 μmol m-2s-1, 14 : 10 h (L : D)에서 촉진되었다. 암배우체의 성 성숙은 5˚C, 20~40 μmol m-2 s-1, 10 : 14 h (L : D)에서 촉진되었으며, 수배우체의 성 성숙은 15˚C, 40 μmol m-2 s-1, 10 : 14 h (L : D)에서 촉진되었다. 이러한 다시마 암수유리배우체의 재생 및 성숙 유도 조건은 다시마의 품종개발과 교잡육종을 위한 유리배우체 배양에 가장 기본적인 자료로 활용될 것이다. Induction of regeneration and maturation of the free-living gametophytes of Saccharina japonica was studied at four temperatures (5, 10, 15 and 20˚C), 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 conditions of 15˚C, 20 μmol m-2 s-1, 10 : 14 h (L : D), whereas the conditions for male gametophytes were slightly different at 15˚C, 5 μmol m-2 s-1, 14 : 10 h (L : D). The sexual maturation of female and male gametophytes took place under 5˚C, 20~40 μmol m-2 s-1, 10 : 14 h (L : D) and 15˚C, 40 μmol m-2 s-1, 10 : 14 h (L : D), respectively. These results provide basic information for controlling the regenerationand maturation of free-living gametophytes for strain improvement and cross breeding of S. japonica.
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갈조류 다시마 유리배우체의 분리, 재생 및 성 숙 유도
황은경,유호창,김세미,백재민,박찬선 한국환경생물학회 2015 환경생물 : 환경생물학회지 Vol.33 No.2
Induction of regeneration and maturation of the free-living gametophytes of Saccharina japonica was studied at four temperatures (5, 10, 15 and 20˚C), 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 conditions of 15˚C, 20 μmol m-2 s-1, 10 : 14 h (L : D), whereas the conditions for male gametophytes were slightly different at 15˚C, 5 μmol m-2 s-1, 14 : 10 h (L : D). The sexual maturation of female and male gametophytes took place under 5˚C, 20~40 μmol m-2 s-1, 10 : 14 h (L : D) and 15˚C, 40 μmol m-2 s-1, 10 : 14 h (L : D), respectively. These results provide basic information for controlling the regenerationand maturation of free-living gametophytes for strain improvement and cross breeding of S. japonica.
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한국 진도의 자연군락 뜸부기(Silvetia siliquosa)의 생장과 성숙 주기
황은경,유호창,하동수,박찬선 한국수산과학회 2015 한국수산과학회지 Vol.48 No.5
The ecological characteristics of Silvetia siliquosa, an endangered brown alga, were investigated from January to December 2013 in Jindo, South Korea. The S. siliquosa population formed widespread patches on natural rock. Receptacles were observed from March to August when seawater temperatures ranged from 8-26℃. A maturation peak was detected in June, when seawater temperatures were 23.4℃. After embryo release, the alga bleached and only the discoidal holdfast remained after August. Developmental initiation of the thallus occurred at temperatures above 8℃, and receptacle formation required approximately 196 degree-days. This is the first study to examine a S. siliquosa population throughout the entire year in a natural habitat.
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갈조류 톳의 포복지 재활용을 위한 친환경적해적생물 구제: pH와 염분
황은경 ( Eun Kyoung Hwang ),유호창 ( Ho Chang Yoo ),김세미 ( Se Mi Kim ),유현일 ( Hyun Il Yoo ),백재민 ( Jae Min Baek ),박찬선 ( Chan Sun Park ) 한국환경생물학회 2014 환경생물 : 환경생물학회지 Vol.32 No.4
본 연구에서는 톳 양식에서 pH 및 염분농도의 조절에의한, 환경친화적인 해적생물 구제 방법을 개발하고자 하였다. 이를 위하여 톳의 내성범위를 구하고, 친환경적인해적생물 구제법을 확립하고자 하였다. 톳에는 생리적 영향을 미치지 않는 친환경적인 해적동물 구제법으로서, pH 4 이하 조건과 pH 10 이상의 조건, 염분농도 10 psu 이하의 조건 및 44 psu 조건에서 효과가 있는 것으로 나타났다. The brown seaweed Sargassum fusiforme is an edible and highly valued in Korea. During the summer season, phytal organisms graze heavily on young algal blades and holdfastsof the species and substantially reduce harvestable biomass. Here, in this study, we investigated the effects of pH (range: 2~13) and salinity (range: 0~44 psu) on the removal of two major phytal animals, Caprella scaura and Gammaropsis utinomi, associated with S. fusiforme. We also examined the optimum quantum yield (Fv/Fm) of algae in the same experimental conditions to quantify the tolerance of algae to acid and salinity treatments. It was observed that the phytal animals showed more than 80% mortality at pH lower that pH 4 and the extreams of salinity (0~10 psu and 44 psu) after a 5 min of immersion. However, the quantum yield of S. fusiforme was not significantly different from controls within the pH 3~11 range, and the 0~44 psu salinity range. Precisely, if the pH and salinity conditions outside these ranges were used in comercial Sargassum culture, the removal of the animal species would be higher, but with reduced quantum yield of algae. Taken together, our study results indicated that the pH and salinity treatments could allow multiple harvests from the same holdfast of S. fusiforme.
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