光、温对鼠尾藻卵子排放和幼孢子体生长的影响

Effects of light and temperature on egg releasing and young sporophyte growth of Sargassum thunbergii

中文关键词: 鼠尾藻  卵子  孢子体  温度  光  排放

英文关键词: Sargassum thunbergii  Egg  Sporophyte  Temperature  Light  Releasing

中文摘要:

      以成熟的鼠尾藻生殖托为材料，研究了不同温度(13~23 ℃)、光照度(3 000~12 000lx)和光照周期(15 L∶9 D，12 L∶12 D，9 L∶16 D)对鼠尾藻排卵及幼孢子体生长的影响。结果显示，温度在20~23 ℃范围，有利于鼠尾藻卵子的排放；在3 000~12 000lx范围内，光照度越高，越有利于鼠尾藻卵子的排放；光周期不是影响卵子排放的主要因素，光照度是鼠尾藻幼孢子体生长的重要因子；温度是制约鼠尾藻幼孢子体生长的关键因子，水温低于16 ℃时不利于幼孢子体的快速生长。

英文摘要:

      The mature receptacles of Sargassum thunbergii were used as materials in this experiment. The effects of temperature(13~23℃), illumination (3 000~12 000lx) and photoperiod (15 L∶9 D, 12 L∶12 D, and 9 L∶16 D) on egg releasing and young sporophyte growth of S. thunbergii were investigated.It was found that it is conducive to releasing eggs at 20~23℃. Between 3 000~12 000lx, higher illumination was more favorable for releasing eggs. Photoperiod was not the main factor of affecting the egg releasing speed. Illumination was an important but not a key factor for the growth of S. thunbergii young sporophyte. Temperature was a key factor for the growth of young sporophyte. Temperature below 16 ℃ was not conducive to the growth of young sporophyte.