TITLE:
Reproductive Biology of Sargassum thunbergii (Fucales, Phaeophyceae)
AUTHORS:
Zhourui Liang, Feijiu Wang, Xiutao Sun, Wenjun Wang, Fuli Liu
KEYWORDS:
Sargassum thunbergii, Reproductive Biology, Temperature, Light
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.17,
July
31,
2014
ABSTRACT: Sargassum
thunbergii is an economically important brown alga that is used as a perferred food
for sea cucumber in China. However, reports on the reproductive biology of S.
thunbergii are limited.
This study observed the characteristics of mature receptacles. The effects of
different temperatures, light intensities, and photoperiods on the egg release
of mature S. thunbergii receptacles were investigated. A liquid-phase
oxygen electrode system was used to obtain light saturation and light
compensation points of egg and young thalli of S. thunbergii. Results
showed that temperature was the key factor for the egg release of mature
receptacles. The conditions most conducive to egg release were 20°C
to 23°C temperature and 50 μmol photons m-2·s-1 to 200 μmol photons m-2·s-1 light intensity.
In addition, the light saturation and compensation points of unfertilized eggs
or young thalli at 2 d or 3 d postfertilization ranged from 90 μmol photons m-2·s-1 to 120 μmol photons m-2·s-1 and 14 μmol photons m-2·s-1 to 22 μmol photons m-2·s-1,
respectively. The combined results provide a reference for the sporeling
culture of S. thunbergii.