수온, 조도, 영양염이 방사무늬김(Pyropia yezoensis)과 잇바디돌김(Pyropia dentata)의 사상체 생장 및 성숙에 미치는 영향
Effects of Temperature, Irradiance and Nutrients on the Growth and Maturation of Conchocelis in Pyropia yezoensis and Pyropia dentata
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The effects of temperature (10–30 °C), irradiance (0, 20, and 100 μmol photons·m-2·s-1), and nutrient regime on the growth and maturation of the conchocelis of Pyropia yezoensis and Pyropia dentata were studied. Both species exhibited vigorous growth under specific temperature conditions, with optimal growth at 15 and 25 °C for P. yezoensis and P. dentata, respectively. Complete mortality was observed at 30°C, and growth was inhibited; however, the cells remained viable under complete darkness. Conchocelis growth was inhibited and conchosporangial formation was delayed under nonenriched conditions compared with under nutrient enriched treatments. Conchosporangia were observed in P. yezoensis at 20–25°C, and in P. dentata under all temperature conditions except 10°C. Temperature, irradiance, and nutrients interactively influenced conchocelis development. These findings provide a basis for understanding stress tolerance of the microscopic stage in Pyropia species under changing marine conditions. This study has practical implications for establishing effective seed production systems and conservation strategies for natural Pyropia populations, contributing to the sustainable management of Pyropia aquaculture under future climate scenarios.
Abstract
The effects of temperature (10–30 °C), irradiance (0, 20, and 100 μmol photons·m-2·s-1), and nutrient regime on the growth and maturation of the conchocelis of Pyropia yezoensis and Pyropia dentata were studied. Both species exhibited vigorous growth under specific temperature conditions, with optimal growth at 15 and 25 °C for P. yezoensis and P. dentata, respectively. Complete mortality was observed at 30°C, and growth was inhibited; however, the cells remained viable under complete darkness. Conchocelis growth was inhibited and conchosporangial formation was delayed under nonenriched conditions compared with under nutrient enriched treatments. Conchosporangia were observed in P. yezoensis at 20–25°C, and in P. dentata under all temperature conditions except 10°C. Temperature, irradiance, and nutrients interactively influenced conchocelis development. These findings provide a basis for understanding stress tolerance of the microscopic stage in Pyropia species under changing marine conditions. This study has practical implications for establishing effective seed production systems and conservation strategies for natural Pyropia populations, contributing to the sustainable management of Pyropia aquaculture under future climate scenarios.