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RISS 인기검색어
- 검색키워드
- 저자 : Uddowla, Md. Hasan (검색결과 3 건)
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Md. Hasan Uddowla,김현우,Umme Salma 한국통합생물학회 2013 Animal cells and systems Vol.17 No.3
Crustacean muscle fibers exhibit a high level of plasticity in various growth and developmental stages and understanding its mechanism is one of the important factors to improve the commercial value of the decapod products including shrimp, lobsters, and crabs. In the present study, four cDNAs encoding actins (PotActinSK1,PotActinSK2, PotActinHT, and PotActinCT) were identified from the swimming crab (Portunus trituberculatus)using a PCR-based cloning strategy. Although the four cDNA encoding actins exhibit similarities in size and deduced amino acid sequences, their tissue expression profiles differ significantly from one another. Phylogenetic analysis revealed that muscular and cytoplasmic actins have been diverged before vertebrates were evolved and cardiac and skeletal muscular actins were branched out after the vertebrates were evolved. Based on the phylogenetic analysis and expression patterns, PotActinSK1 and SK2 belong to the slow-type skeletal muscle actins and the fast-type skeletal muscle actin has not been identified. PotActinHT showed the highest sequence similarity to Ha-ActinHT from H. americanus and appeared to be an ortholog of heart muscle actins in decapod crustaceans. PotActinCT exhibited the highest sequence similarity to the cytoplasmic actin of L. vannamei ActinT1. End-point RT-PCR results showed that PotActinSK1 and PotActinSK2 were strongly expressed in skeletal muscular tissues including chela propodus muscle, chela merus muscle, leg muscle, thoracic muscle, and there was no significant difference in the expression ratio between the two genes of those four tissues. PotActinCT was ubiquitously expressed in all the tissues, whereas PotActinHT was exclusively expressed in the heart. Interestingly, a considerable level of PotActinCT was expressed in the heart, which is similar to those of PotActinHT. The transcriptional response to 20-hydroxyecdysone (20E) injection was different in each PotActin suggesting that effects of muscle plasticity by 20E may differ in each tissue of decapod crustaceans.
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Salma, Umme,Uddowla, Md. Hasan,Lee, Gi-Hun,Yeo, Young-Min,Kim, Hyun-Woo The Korean Society of Fisheries and Aquatic Scienc 2012 Fisheries and Aquatic Sciences Vol.15 No.2
To understand the effects of lower pH levels due to elevated $CO_2$ and salinity, we designed and constructed a pH-control system that included automatic $CO_2$ infusion and measured the hatching rate of a crustacean model species, Artemia franciscana. The pH-control system was cost-effective and capable of performing animal tests in which pH fluctuated around $8.0{\pm}0.1$, with the temperature around $27{\pm}0.5^{\circ}C$. Hatching rate was observed under four different pH levels (7.0, 7.3, 7.6, and untreated control) combined with three salinity ranges (15, 25, and 35 ppt). The results demonstrated that lower pH levels led to decreased hatching rates regardless of salinity, and the minimum hatching rate was detected at pH 7.0 compared to the control (pH $8.0{\pm}0.1$), supporting the idea that OA has adverse effects on hatching rates and increases the risk of juveniles being introduced in the ecosystem. In contrast, salinity changes exhibited no synergistic effects with pH and had independent effects.
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Effects of pH Change by CO2 Induction and Salinity on the Hatching Rate of Artemia franciscana
Umme Salma,Md. Hasan Uddowla,이기훈,여영민,김현우 한국수산과학회 2012 Fisheries and Aquatic Sciences Vol.15 No.2
To understand the effects of lower pH levels due to elevated CO2 and salinity, we designed and constructed a pH-control system that included automatic CO2 infusion and measured the hatching rate of a crustacean model species, Artemia franciscana. The pH-control system was cost-effective and capable of performing animal tests in which pH fluctuated around 8.0 ± 0.1, with the temperature around 27 ± 0.5°C. Hatching rate was observed under four different pH levels (7.0, 7.3, 7.6, and untreated control)combined with three salinity ranges (15, 25, and 35 ppt). The results demonstrated that lower pH levels led to decreased hatching rates regardless of salinity, and the minimum hatching rate was detected at pH 7.0 compared to the control (pH 8.0 ± 0.1), supporting the idea that OA has adverse effects on hatching rates and increases the risk of juveniles being
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