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| 桑沟湾常见温带海草叶绿素荧光特性的比较 |
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唐望1,2, 方建光2, 高亚平2, 邹健2, 吴桃2, 杜美荣2
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1.华东理工大学生物工程学院, 上海 200237;2.农业部海洋渔业可持续发展重点实验室 中国水产科学研究院黄海水产研究所, 青岛 266071
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| 摘要: |
| 2011年7~8月在桑沟湾楮岛南岸东部海域，利用水下调制脉冲式荧光仪（DIVING-PAM）原位测定了中国北方3种常见温带海草大叶藻、丛生大叶藻以及红纤维虾海藻的不同叶龄叶片的叶绿素荧光特性，并确定了几种海草的吸光系数（AF）和叶片叶绿素含量，计算出海草绝对电子传递速率。实验结果表明，叶龄对海草的光合活性有较大影响，同种海草的AF值和叶绿素含量都随叶龄增加而增加，叶龄小的叶片明显具有较大的最大电子传递速率（ETRmax）（大叶藻：叶1= 26.56，叶2=21.45，叶3=19.98；红纤维虾海藻叶1=22.31，叶2=19.23，叶3=1706；丛生叶藻：叶1=20.16，叶2=16.10；叶3=13.10）。相比于丛生大叶藻和红纤维虾形藻，大叶藻具有最高的光合活性（ETRmax=22.67），这也与大叶藻在3种海草中所具有最高的初级生产力是相符合的。 |
| 关键词: 叶绿素荧光特性 大叶藻 丛生大叶藻 红纤维虾海藻 桑沟湾 |
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| 基金项目:973课题（2011CB409805）、国家科技支撑计划课题（2010BAC68B03）和山东省科技攻关计划项目（2010G0020505） |
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| Chlorophyll fluorescence characteristics of common temperate seagrass species in Sanggou Bay |
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| Abstract: |
| The chlorophyll fluorescence of the blades of three common seagrass species (Zostera marina, Z. caespitosa and Phyllospadix iwatensis) in eastern waters of Chudao, south coast of Sanggou Bay, was determined using the pulse amplitude modulated (PAM) fluorometer. The absorbance factor (AF) of seagrass blades were also determined,and the absolute electron transport rates of the seagrass species were calculated.It was found that the photosynthetic activity of Z. marina, Z. caespitosa and P. iwatensis, was strongly influenced by leaf age. The chlorophyll content and the AF values increased with blade age in respective plants. Young blades showed higher electron transport rate than older ones (Zm: Leaf 1=26.56, Leaf 2=16.3, Leaf 3= 19.98; Pi: Leaf 1 =22.31, Leaf 2=19.23, Leaf 3=17.06; and Zc: Leaf 1=20.16, Leaf 2 =16.10，Leaf 3=13.10). Among three species, Z. marina showed the highest photosynthetic activity (ETRmax=22.67), in accordance with its highest productivity in the field compared with the other two species. |
| Key words: Chlorophyll fluorescence characteristics Zostera marina Phyllospadix iwatensis Zostera caespitosa Sanggou Bay |