괭생이모자반( Sargassum horneri ) 유배의 생장에 미치는 온도, 광량, 광주기의 영향
Effects of Temperature, Photon Irradiance, and Photoperiod on the Growth of Embryos of Sargassum horneri in Laboratory Culture
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초록
The effects of temperature, photon irradiance, and photoperiod on the growth of Sargassum horneri embryos were examined for female plants collected at Chokpo in Tongyeoung, Gyeongnam Prefecture, Korea on 27 December 2011. Mature plant receptacles were detached, and fertilized eggs were cultured in the laboratory at temperatures of 5-25℃ with photon irradiances of 10-80 μmol m-2s-1 under 14L:10D and 10L:14D photoperiods. Germination and embryo growth were rapid at 20-25℃ and 40 μmol m-2s-1 under 14L:10D. The number of rhizoids in the germinated young thalli was high at high photon irradiances (40-80 μmol m-2s-1) and 15-20℃. At 20℃ and 14L:10D, vigorous growth of main and lateral branches was observed; however, at 5℃ under both photoperiods, plant growth decreased markedly. In the present study, S . horneri grew well at high temperatures (20-25℃) and high photon irradiances (40-80 μmol m-2s-1) with a 14L:10D photoperiod.
Abstract
The effects of temperature, photon irradiance, and photoperiod on the growth of Sargassum horneri embryos were examined for female plants collected at Chokpo in Tongyeoung, Gyeongnam Prefecture, Korea on 27 December 2011. Mature plant receptacles were detached, and fertilized eggs were cultured in the laboratory at temperatures of 5-25℃ with photon irradiances of 10-80 μmol m-2s-1 under 14L:10D and 10L:14D photoperiods. Germination and embryo growth were rapid at 20-25℃ and 40 μmol m-2s-1 under 14L:10D. The number of rhizoids in the germinated young thalli was high at high photon irradiances (40-80 μmol m-2s-1) and 15-20℃. At 20℃ and 14L:10D, vigorous growth of main and lateral branches was observed; however, at 5℃ under both photoperiods, plant growth decreased markedly. In the present study, S . horneri grew well at high temperatures (20-25℃) and high photon irradiances (40-80 μmol m-2s-1) with a 14L:10D photoperiod.
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