温度对全缘马尾藻幼孢子体生长和生理组分的影响

摘要

Content of photosynthetic pigment and activity of SOD and CAT of juvenile sporophyte of Sargassum intrgerrimum were determined under the conditions of illuminance 10 000 lx, photoperiod 12L:12D, and temperature 11.0, 16.0, 21.0, 26.0, 31.0, 36.0 ℃, and the effects of different temperatures on the growth of the juvenile sporophyte were studied to make sure its adaptability to temperature. Results showed that the juvenile sporophyte had a statistical growth (P﹤0.05) under the temperatures from 16.0 to 26.0℃, and the fastest and the slowest growth were gained at 21.0 and 11.0 ℃, respectively. The juvenile sporophyte festered due to the high temperature at 31.0 and 36.0℃. Generally, the suitable temperature of the juvenile sporophyte ranged from 16 to 26℃, and the optimal temperature was 21℃.%为探究全缘马尾藻（Sargassum intrgerrimum）幼孢子体对温度的适应性，在照度为10000 lx，光照周期为12L：12D，温度分别为11.0、16.0、21.0、26.0、31.0、36.0℃的条件下，研究不同温度对全缘马尾藻幼孢子体生长、光合色素含量、SOD 活力和 CAT 活力的影响。结果表明，幼孢子体在16.0～26.0℃的温度范围内生长明显，差异有统计学意义（P﹤0.05），温度为21.0℃时生长最快；温度为11.0℃时生长缓慢，温度为31.0和36.0℃时幼孢子体的生长因温度过高有溃烂现象。在本实验条件下，全缘马尾藻幼孢子体的适宜温度范围为16.0～26.0℃，最适温度为21.0℃。