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한국 남해에서 분리한 유해 침편모조류 Chattonella ovata Y. Hara et Chihara의 수온, 염분 및 광량에 대한 성장특성
노일현,윤양호,김대일,오석진,김종덕,Noh, Il-Hyeon,Yoon, Yang-Ho,Kim, Dae-Il,Oh, Seok-Jin,Kim, Jong-Deok 한국해양학회 2010 바다 Vol.15 No.3
We investigated the effects of water temperature, salinity and irradiance on the growth of the harmful algae Chattonella ovata isolated from South Sea, Korea. C. ovata grew under all combinations of water temperatures and salinity, except for all the salinity conditions at the water temperature of $10^{\circ}C$, with the salinity of 7.5 psu and 10 psu at $15^{\circ}C$, and 7.5 psu at $20^{\circ}C$ and $30^{\circ}C$. The maximum specific growth rate was $0.62\;day^{-1}$ at the combination of $30^{\circ}C$ and 30 psu. The results of two-way ANOVA indicated that growth rate depended greatly on the water temperatures while not being affected by interactions with the salinity. This indicates that C. ovata is a stenothermal and euryhaline organism, preferring high water temperatures. C. ovata did not grow at irradiance ${\leq}30\;{\mu}mol$ photons $m^{-2}s^{-1}$. Photoinhibition did not occur at $800\;{\mu}mol$ photons $m^{-2}s^{-1}$, which was the maximum irradiance used in this study. The irradiance-growth curve was described as $\mu$ = 0.74(I-16.0)/(I+43.9) at $30^{\circ}C$ and 30 psu. The half-saturation light intensity ($K_s$) was $75.9\;{\mu}mol$ photons $m^{-2}s^{-1}$ and compensation photon flux density ($I_c$) was $16.0\;{\mu}mol$ photons $m^{-2}s^{-1}$, especially this value was comparatively lower than those of Skeletonema costatum and other flagellates previously reported. Therefore, our results indicate that C. ovata has advantageous physiological characteristics for interspecific competition at the embayment and coastal areas of Korea in summer. 한국 남해에서 분리한 유해조류 Chattonella ovata의 성장에 미치는 수온과 염분 및 광량의 영향을 조사하였다. C. ovata는 $10{\sim}30\;^{\circ}C$의 수온과 7.5~40 psu의 염분조합 중 $10^{\circ}C$의 모든 염분조합과 $15^{\circ}C$의 7.5 psu와 10 psu, 그리고 $20^{\circ}C$와 $30^{\circ}C$의 7.5 psu를 제외한 모든 조합에서 성장하였다. 최대 성장속도는 $30^{\circ}C$, 30 psu 조합에서 $0.62\;day^{-1}$로 관찰되었다. 이원배치 분산분석(two-way ANOVA) 결과로부터 그들의 성장속도는 수온에 크게 의존할 뿐 염분과 교호작용의 영향은 미약하였다. 이와 같은 결과는 C. ovata가 고수온을 선호하는 광염성종임을 지시하였다. C. ovata는 $30\;{\mu}mol$ photons $m^{-2}s^{-1}$ 이하의 광량에서는 성장이 이루어지지 않았고, 본 연구에서 제공한 최대 광량인 $800\;{\mu}mol$ photons $m^{-2}s^{-1}$서 광 저해현상은 보이지 않았다. 광 조건에 의해 유도된 성장식 $\mu$=0.74(I-16.0)/(I+43.9)으로부터 성장에 대한 반포화광량($K_s$)은 $75.9\;{\mu}mol$ photons $m^{-2}s^{-1}$, 절대광량($I_c$)은 $16.0\;{\mu}mol$ photons $m^{-2}s^{-1}$로 나타났으며, 특히 $K_s$는 규조류인 Skeletonema costatum을 비롯한 다른 여러 편모조류보다 낮았다. 이상의 결과로부터 C. ovata는 하계 한국 내만과 연안해역에서 종간경쟁에 유리한 생리특성을 가진 종으로 판단되었다.
노일현,김석일,강신영,조승열 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.1
In the early phase of experimental metagonimiasis in cats or dogs, non-specific villous changes were observed as shortening, widening, tip flattening, and fusion of villi, and as stromal edema. These changes reach their peak in 5-15 days after infection. Later than this period, these villous changes gradually returned to normal. The pathogenetic factor causing such villous pathology was investigated in the present study, mechanical destruction of enterocytes by worms as a main factor involved. A total of 8 domestic cats was experimentally infected with 5,000 metacercariae of Metagonimus yokogawai; then each cat was killed every day to 8th day after infection. Other 2 cats were killed as control. Three ㎝ long small intestinal tissue were taken from every 30 ㎝ from pylorus, and processed histologically. The observation results were as follows: 1. The intestinal lesions were limited to jejunum of the infected cats. At early phase of infection, the mucosal lesion were tortuous tissue defects or fibrinous exudates infiltrated by inflammatory cells at the upper portion of crypt of Lieberku¨hn. The reduction of villous length varied by individual cats. The sectioned worms were only very rarely observed in the crypt of Lieberku¨hn, unlike the cases of dogs. 2. By serial sections of jejunal tissues, that adult worms of Metagonimus yokogawai were found to make ulcer up to stromal tissue at villo-crypt junction. Enterocytes and goblet cells at the junction were degenerated and denuded by the retracting movements of anterior body of worms armed with tegumental spines. 3. The shallow ulcers which were formed by the worms were healed by syncytosis of enterocytes of nearby villus. By this healing process, adhesion of a villus to nearby one resulted in shortened, widened, or multilobed villi. And also intravillous epithelial tissue were resulted. From the above observations, the lesions of villi at the early stages of experimental metagonimiasis were considered as a result of uncompensated enterocytes deficit which was elicited by the mechanical destruction at upper parts of crypt of Lieberku¨hn or at villo-crypt junction.
남해 연안해역에서 분리한 유해성 침편모조류 Chattonella ovata의 성장에 대한 수온, 염분 및 빛의 영향
노일현(I. H. Noh),윤양호(Y. H. Yoon),김대일(D. I. Kim) 한국해양환경·에너지학회 2006 한국해양환경공학회 학술대회논문집 Vol.2006 No.-
우리나라 남서해의 장홍연안에서 분리한 유해 유독 침편모조류 Chattonella ovata의 성장에 대한 수온, 염분 및 빛의 영향을 파악하였다. C. ovata는 수온 15~30℃, 염분 7.5~40 Psu 범위에서 성장하였다. 최대 성장속도는 0.47day?¹로 25℃와 30 psu 조합에서 관찰되었다. 최적 성장조건(최대 성장속도의 70% 이내)을 보인 수온과 염분의 범위는 각각 20~30℃, 15~35 psu로 나타났다. 이 결과, C. ovata는 고수온의 협온성 및 광염성 종으로 판단되었다. C. ovata는 30 μ㏖ m?²s?¹,이하의 광 조건에서는 성장이 이루어지지 않았고, 50 μ㏖ m?²s?¹,이상의 광 조건에서 성장하였다. 또한 본 연구에서 사용된 최대 광 조건인 800 m?² s?¹에서 광 저해현상은 보이지 않았다. 광 조건에 의해 유도된 성장식은 μ=0.56(I-14.8)/(I+33.9), (r=0.898)로 나타났으며, 이들의 보상광량(Ic)은 14.8 μ㏖ m?² s?¹, 반포화광량(Ks)은 63.5 μ㏖ m?² s?¹로 나타났다. The effects of water temperature, salinity and irradiance on the growth of hamful algae Chattonella ovata (Raphidophyceae) isolated from Jangheung coastal water in Southwestern Sea, Korea were investigated. C ovata was able to grow in temperatures of 15~30℃ and salinities of 7.5~40 psu. Maximum specific growth rate (0.47 day?¹) was observed with combination of 25℃ and 30 psu. Optimum growth (≥70% of maximum specific growth rate) was obtained with a range of 20~30℃, 15-35 psu, respectively. This result indicated that C. ovata is a stenothermal of the high water temperature and euryhaline organism C. ovata was did not grow at irradiance ≤30 μ㏖ m?² s?¹. And C. ovata was able to grow at ≥50 μ㏖ m?² s?¹. Photoinhibition did not occur at 800μ㏖ m?² s?¹, which was the maximum irradiance used in this study. The irradiance-growth curve was described as μ=0.56(I-14.8)/(I+33.9), (r=0.898) under 25℃ and 25 psu. The half-saturation photon flux density (Ks) was 63.5 μ㏖ m?² s?¹ and compensation photon flux density (Ic) was 14.8 μ㏖ m?² s?¹.