Phylogenetic Diversity in the Macromolecular Composition of Microalgae.
Phylogenetic Diversity in the Macromolecular Composition of Microalgae.
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DOI：
10.1371/journal.pone.0155977
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Irwin AJ
中科院分区：
文献类型：
--
作者：
Finkel ZV;Follows MJ;Liefer JD;Brown CM;Benner I;Irwin AJ
微藻的元素化学计量反映了其潜在的大分子组成，并影响物种之间的竞争相互作用及其在食物网和生物地球化学中的作用。在这里，我们提供了一个新的估计的微藻的大分子组成使用分层贝叶斯分析的数据从文献中编译。营养充足的指数生长微藻的中值大分子组成为32.2%蛋白质、17.3%脂质、15.0%碳水化合物、17.3%灰分、5.7% RNA、1.1%叶绿素a和1.0% DNA（以干重百分比计）。我们的分析确定了显着的系统发育差异的大分子组成未检测到的先前的研究，由于小样本量和大分子池的固有变异性。大分子组成的系统发育差异导致碳氮比的变化，这与独立的观察结果是一致的。大分子和元素组成的这些系统发育差异反映了细胞结构和生物化学的适应性;特别是在细胞壁，光捕获装置和储存池中。
The elemental stoichiometry of microalgae reflects their underlying macromolecular composition and influences competitive interactions among species and their role in the food web and biogeochemistry. Here we provide a new estimate of the macromolecular composition of microalgae using a hierarchical Bayesian analysis of data compiled from the literature. The median macromolecular composition of nutrient-sufficient exponentially growing microalgae is 32.2% protein, 17.3% lipid, 15.0% carbohydrate, 17.3% ash, 5.7% RNA, 1.1% chlorophyll-a and 1.0% DNA as percent dry weight. Our analysis identifies significant phylogenetic differences in macromolecular composition undetected by previous studies due to small sample sizes and the large inherent variability in macromolecular pools. The phylogenetic differences in macromolecular composition lead to variations in carbon-to-nitrogen ratios that are consistent with independent observations. These phylogenetic differences in macromolecular and elemental composition reflect adaptations in cellular architecture and biochemistry; specifically in the cell wall, the light harvesting apparatus, and storage pools.