Abstract: Natural ecology and growth of sea weed Gloiopeltis tenax were observed in coastal Dalian. Development of the tetrasporophytes and gametophytes and release of tetraspores and carpospores onto substrata such as Petri dishes and shells were studied under different water temperature in an indoor culture in Dalian. The results showed that the fronds were found in October and vanished in July of the next year, the maximum length being observed during the last ten days of April at 6 ℃ and the first - ten days of May at 9 ℃. The reproductive period of the carposporophytes and tetrasporophytes was last from early April at 6℃ to mid - June at 12 ℃, and the carposporo- phytes were released from late April at 6 ℃ to mid - May at 10 ℃, with the peak period at 0.9 × 10^6 cells/g in early May. The tetrasporophytes were released from early May at 9 ℃ to mid -June at 12 ℃, with the peak at 1. 65 × 10^6 cells/g at late May. Both carpospores and tetraspores were attached to the substrata, and thereafter gave rise to crusts which developed into erect thalli with about 250 um in diameter. The crusts and erect thalli exposed to the air for two hours in the morning and afternoon exhibited better growth than those in normal culture. The germlings of the sea weed had been obtained from erect thalli generated from the crusts in the indoor culture.
2009, Vol. 24 
