静止和充气培养条件下光强对龙须菜光合生理效应的影响  

Effect of light intensity on the photosynthetical responses of Gracilaria lemaneiformis in non-aerated and aerated cultures

作　　者：韩婷婷[1] 方建光[1] 张继红[1] 蒋增杰[1] 汪文俊[1] 姜绪[1] 毛玉泽[1] 

机构地区：[1]中国水产科学研究院黄海水产研究所,农业部海洋渔业可持续发展重点实验室,山东青岛266071

出　　处：《水产学报》2013年第12期1801-1806,共6页Journal of Fisheries of China

基　　金：国家重点基础研究发展计划(2011CB409805);"十二五"国家科技支撑计划(2011BAD13B06;2011BAD13B02);国家自然科学基金项目(41276172)

摘　　要：为研究充气和光强变化对大型海藻生长的影响,选择了常见的经济海藻龙须菜为实验材料,将静止和充气培养的藻体暴露在50μmol/(m2·s)(低光)、100μmol/(m2·s)(中光)和200μmol/(m2·s)(高光)下,测定其生长、光合作用以及光合色素含量。结果表明,中光处理的龙须菜相对生长速率最大,光强过低或者过高均会抑制其生长。充气促进低光、中光和高光处理藻体的生长,相对生长速率分别提高26.85%、31.82%和40.56%。充气可使低光处理的藻体光合作用速率和光合效率分别提高8.14%和4.26%,可使高光处理的藻体呼吸作用速率降低20.70%、Yield升高44.16%。这些结果说明,低光对生长的影响主要是由于藻体光合作用受到光限制,而高光对生长的影响是因为藻体呼吸作用增强。充气可以缓解因为光线不足或者高光损伤而对龙须菜生长造成的负面影响。The economic red macroalga Gracilaria lemaneiformis was selected to study light intensity effects on its growth, photosynthesis, effective quantum efficiencies （Yield） and pigments contents in aerated and non-aerated cultures. Three different light intensities were as follows： 50 μ mol/（ m2·s） （low light intensity）, 100μmol/（ m2·s） （ moderate light intensity）, and 200 μmol/（ m2· s） （ high light intensity）. The results showed that the highest growth rate of G. lemaneiformis was observed when alga was treated with moderate light intensity, and too low or too high light intensity inhibited its growth. The relative growth rates of aerated cultured algae, under the low light intensity, moderate light intensity and high light intensity, were increased by 26.85 % ,31.82% and 40.56% , respectively. In aerated culture, the photosynthetic rate and the photosynthetic efficiency of alga treated with low light intensity increased by 8. 14% and 4.26% , and the respiration rate of alga under high light intensity decreased by 20.70% , and Yield increased by 44.16%. The results suggested that reduced growth was mainly due to the limited photosynthesis in case of low light intensity, or could be ascribed to the increased respiration in case of high light intensity. Aerated culture could relieve the negative effect on the growth rate of alga as a result of for low light or high light intensity.

关 键 词：龙须菜 充气 光强 光合作用 

分 类 号：S968.4[农业科学—水产养殖]