| 摘要: |
| 大气中CO2浓度不断升高导致的海水酸化，已经引起了广泛的环境、生态和气候问题。本实验采用实验生态学的方法，以盐生杜氏藻（Dunaliella salina）为研究对象，分析其在CO2加富的条件下叶绿素荧光参数的变化。研究表明，CO2加富对盐生杜氏藻光系统Ⅱ最大光化学量子产额（Fv/Fm）和最大相对电子传递速率（rETRmax）无显著影响（P>0.05），显著促进了光系统Ⅱ实际光合效率（P<0.05）和光能利用效率（α）（P<0.05），并且降低了饱和光强（Ek）（P<0.05）。然而，CO2升高增加了盐生杜氏藻的光抑制参数（β）（P<0.05）和非光化学淬灭（NPQ）（P<0.05），这说明在光照充足的情况下，CO2加富会对盐生杜氏藻产生负面效应，使其更容易受到光抑制。 |
| 关键词: CO2 海水酸化 盐生杜氏藻 叶绿素荧光 |
| DOI：10.11693/hyhz20170300051 |
| 分类号: |
| 基金项目:海洋公益性行业科研专项经费资助项目，201305027号；国家自然科学基金项目，41476091号。 |
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| EFFECTS OF ELEVATED CO2 ON CHLOROPHYLL FLUORESCENCE TO DUNALIELLA SALINA |
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ZANG Yu1, HUANG Zhi-Yuan2, ZHAO Xin-Yu1, HU Shun-Xin1,3
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1.College of Marine Life Science, Ocean University of China, Qingdao 266003, China;2.Qingdao No. 58 High School of Shandong Province, Qingdao 266199, China;3.Shandong Marine Resource and Environment Research Institute, Yantai 264006, China
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| Abstract: |
| The increasing atmosphere carbon dioxide have led to a reduction in pH in the ocean and caused a wide range of environment, ecology, and climate problems. To investigate the potential effect of elevated CO2 on marine microalgae photosynthesis, Dunaliella salina was exposed to two different pCO2 levels:390 and 1000 ppmv. Results show that the elevated CO2 level stimulated the light utilization efficiency (α), actual photochemical efficiency (Yield), non-photochemical quenching (NPQ), and photoinhibition rate (β), decreased the light saturation point (Ek) of D. salina, while rETRmax and Fv/Fm remained stable. |
| Key words: CO2 ocean acidification Dunaliella salina the chlorophyll fluorescence |
