| 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 $5-25^{ circ}C$ with photon irradiances of $10-80{ mu}mol ;m^{-2}s^{-1}$ under 14L:10D and 10L:14D photoperiods. Germination and embryo growth were rapid at $20-25^{ circ}C$ and $40{ mu}mol ;m^{-2}s^{-1}$ under 14L:10D. The number of rhizoids in the germinated young thalli was high at high photon irradiances ( $40-80{ mu}mol ;m^{-2}s^{-1}$ ) and $15-20^{ circ}C$ . At $20^{ circ}C$ and 14L:10D, vigorous growth of main and lateral branches was observed; however, at $5^{ circ}C$ under both photoperiods, plant growth decreased markedly. In the present study, S. horneri grew well at high temperatures ( $20-25^{ circ}C$ ) and high photon irradiances ( $40-80{ mu}mol ;m^{-2}s^{-1}$ ) with a 14L:10D photoperiod. |
