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Position: Home > Articles > Impact of light intensity on growth and levels of photosynthetic pigments of Gracilaria chouae Progress in Fishery Sciences 2013,34 (1) 145-150

光照对脆江蓠生长及光合色素含量的影响

作  者:
卢晓;李美真;徐智广;王翔宇
单  位:
山东省海水养殖研究所藻类中心实验室
关键词:
脆江蓠;相对生长速率;光合色素;光合作用
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。
译  名:
Impact of light intensity on growth and levels of photosynthetic pigments of Gracilaria chouae
作  者:
LU Xiao 1,2 LI Mei-zhen 1* XU Zhi-guang 1 WANG Xiang-yu 1(1 Algae Research Center,Mariculture Institute of Shandong Province,Qingdao 266002)(2 College of Fisheries,Ocean University of China,Qingdao 266003)
关键词:
Gracilaria chouae Light intensity Relative growth rate Photosynthetic pigment Photosynthesis
摘  要:
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/m2.s).In a short time(<7d),G.chouae achieved the rapidest grow that 80~120 μ mol/m2.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/m2.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/m2.s and 35±15 μ mol/m2.s,respectively.

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