Light absorption and size scaling of light-limited metabolism in marine diatoms
Light absorption and size scaling of light-limited metabolism in marine diatoms
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DOI：
10.4319/lo.2001.46.1.0086
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发表时间：
2001-01-01
影响因子：
4.5
通讯作者：
Finkel, ZV
中科院分区：
文献类型：
--
作者：
Finkel, ZV
以往的研究发现，单细胞藻类代谢速率的尺度指数往往偏离异养生物通常发现的指数-1/4。这项研究证实了一个显着的线性关系对数细胞体积（妈妈（3））和对数内在生长速率（h（-1）），碳归一化光合能力和性能（h（-1）），和碳归一化呼吸速率（h（-1））的8个海洋中心硅藻营养饱和，光限制条件下。内禀生长速率和碳标准化呼吸速率的尺度指数与-1/4没有显著差异，而碳特异性光合速率偏离-1/3。由于包装效应的光吸收截面（m（2）毫克叶绿素a（-1））的大小依赖性提供了一个机械模型，解释了异常的尺寸缩放的单细胞浮游植物的合成代谢率。
Previous studies have found that the size-scaling exponent of metabolic rates in unicellular algae often deviates from the exponent of -1/4 usually found for heterotrophs. This study confirms a significant linear relationship between log cell volume (mum(3)) and log intrinsic growth rate (h(-1)), carbon-normalized photosynthetic capacity and performance (h(-1)), and carbon-normalized respiratory rate (h(-1)) for eight marine centric diatoms under nutrient-saturated, light-limited conditions. The intrinsic growth rate and carbon-normalized respiratory rate have size-scaling exponents not significantly different from -1/4, whereas the carbon-specific photosynthetic rates deviate from -1/ 3. The size dependence of the optical absorption cross section (m(2) mg chlorophyll a(-1)) due to the package effect provides a mechanistic model that explains the anomalous size scaling of the anabolic rates of unicellular phytoplankton.