温度、光照强度对舌状蜈蚣藻早期发育的影响

Effects of temperature and irradiance on early development of Grateloupia livida

舌状蜈蚣藻（Grateloupia livida）是一种具有较高应用价值的红藻。文章研究了不同的温度（15℃、20℃、25℃和30℃）和光照强度（500 lx、2500 lx、5 000 lx和10 000 lx）对舌状蜈蚣藻早期发育的影响。试验结果表明,舌状蜈蚣藻适合果孢子发育为盘状体的条件为温度25℃、光照5 000 lx。果孢子在25~30℃条件下首先形成盘状体,15℃下形成最慢;盘状体在25℃首先长出直立枝,其次是20℃、15℃和30℃。果孢子在5 000~10 000 lx的光照强度下首先形成盘状体,2 500 lx次之;在盘状体发育过程中较高光强可以促进盘状体的生长发育,低光强培养条件显著抑制了盘状体的生长发育。

Grateloupia livida is a kind of commercial and scientific red alga with potential value in nutraceuticals and pharmaceuticals.We investigate the early development of G.livida at different temperatures（15 ℃,20 ℃,25 ℃ and 30 ℃） and light intensities（500 lx,2 500 lx,5 000 lx and 10 000 lx）.The results show that the optimal conditions for the development of carpospores are tem-perature 25 ℃ and illumination 5 000 lx.The discoid crusts form were firstly at 25~30 ℃ and lastly at 15 ℃.Seedings cultured from discoid crusts were firstly observed at 25 ℃,then at 20 ℃,15 ℃ and 30 ℃.The discoid crusts form firstly at 5 000~10 000 lx and then at 2 500 lx.In conclusion,high light intensity significantly accelerates the growth and development of discoid crusts.Low light intensity of 500 lx retards the growth and development of discoid crusts of G.livida.