光照对脆江蓠生长及光合色素含量的影响  

Impact of light intensity on growth and levels of photosynthetic pigments of Gracilaria chouae

作　　者：卢晓[1,2] 李美真[1] 徐智广[1] 王翔宇[1] 

机构地区：[1]山东省海水养殖研究所藻类中心实验室,青岛266002 [2]中国海洋大学水产学院,青岛266003

出　　处：《渔业科学进展》2013年第1期145-150,共6页Progress in Fishery Sciences

基　　金：国家海洋公益项目(200905020;200905019;201105008-2);国家863项目(2012AA10A413)共同资助

摘　　要：将福建宁德海区人工养殖的脆江蓠分别于40、80、120、160、200μmol/m2.s光照下进行培养。测定其相对生长速率、干重、光合色素含量、光合作用速率等指标,并绘制光合作用曲线,计算其光饱和点和光补偿点。结果表明,在低光照(40μmol/m2.s)下,脆江蓠呈现负生长,但光合色素含量较高;短期(7d)内,80～120μmol/m2.s的光照强度适宜脆江蓠生长,相对生长速率显著高于其他光强,光合色素含量也显著高于高光强各组;经长期(14～28d)培养,高光强(160～200μmol/m2.s)下的脆江蓠相对生长速率和光合色素含量逐渐升高,随光照增强,藻体干重不断增大,在200μmol/m2.s下干重达到最大;20℃时,脆江蓠呼吸作用速率为0.07±0.03μmolO2/g.min,最大光合作用速率为0.40±0.12μmolO2/g.min,光补偿点为35±15μmol/m2.s,光饱和点为200±60μmol/m2.s。The impact of light intensity on growth and biomass of Gracilaria chouae were studied under laboratory conditions.It was found that G.chouae could not keep long term growth at a low light intensity（40 μ mol/m^2.s）.In a short time（7d）,G.chouae achieved the rapidest grow that 80～120 μ mol/m^2.s,and the content of photosynthetic pigment was greater than the other treatments.In a longer period（14～28d）,the relative growth rate and the content of photosynthetic pigment of G.chouaeincreased with higher light intensities.Their dry weight reached the peak at 200 μ mol/m^2.s.The highest photosynthetic rate and respiration rate of G.chouae were obtained at 0.40±0.12 μ mol O 2/g.s,and 0.07±0.03 μ mol O 2/g.s respectively.The light saturation and compensation points of G.chouae were 200±60 μ mol/m^2.s and 35±15 μ mol/m^2.s,respectively.

关 键 词：脆江蓠 相对生长速率 光合色素 光合作用 

分 类 号：S968.43[农业科学—水产养殖]