| 저자(한글) |
나연주,전다빈,한수진,안대성,차형기,이재봉,양재형,이해원,최한길 |
| 초록 |
We examined for differences in the growth and fertility of microscopic stages between Costaria costata and Undaria pinnatifida in crossed temperature #xD7;irradiance (12, 17, 22 #x2103; #xD7;20, 60 #x3BC;mol photons m #x2013;2 s #x2013;1 ) and daylength #xD7;irradiance (8, 12, 16, 24 h #xD7;20, 60 #x3BC;mol photons m #x2013;2 s #x2013;1 ) experimental designs. After 13 days in culture, maximum gametophyte growths of the two species were obtained under the following combinations of factors: 17 #x2103; #xD7;60 #x3BC;mol photons m #x2013;2 s #x2013;1 and 24 h daylength #xD7;60 #x3BC;mol photons m #x2013;2 s #x2013;1 . C. costata gametophytes produced sporophytes about 6 days earlier than those of U. pinnatifida. Sporophyte densities were highest in the 12 h daylength #xD7;60 #x3BC;mol photons m #x2013;2 s #x2013;1 combination after 20 days in C. costata (9.7 plants mm #x2013;2 ) and 26 days in U. pinnatifida (9.1 plants mm #x2013;2 ). However, optimal growth conditions for the microscopic sporophytes differed between species: 17 #x2103; #xD7;60 #x3BC;mol photons m #x2013;2 s #x2013;1 for C. costata, 12 #x2103; #xD7;60 #x3BC;mol photons m #x2013;2 s #x2013;1 for U. pinnatifida. Thus, C. costata gametophytes grew faster and produced sporophytes earlier than those of U. pinnatifida, even though the haploid gametophytes of the two species responded similarly to environmental conditions. Optimal growth temperatures for the microscopic sporophytes also differed between species. |
