Extracellular DNA plays a key role in deep-sea ecosystem functioning
Extracellular DNA plays a key role in deep-sea ecosystem functioning
复制标题
DOI：
10.1126/science.1117475
复制
发表时间：
2005-09-30
期刊：
影响因子：
56.9
通讯作者：
Danovaro, R
中科院分区：
文献类型：
--
作者：
Dell'Anno, A;Danovaro, R
海洋沉积物中细胞外 DNA 的生态作用和生物地球化学相关性尚不清楚。我们的全球估计表明，深海沉积物顶部 10 厘米处存在多达 0.45 吉吨的细胞外 DNA，是世界海洋中最大的 DNA 库。我们证明细胞外DNA约占有机磷再生总量的五分之一，并提供了原核生物对有机磷需求的近一半。因此，它在全球范围内的深海生态系统功能中发挥着关键作用。
The ecological role and biogeochemical relevance of extracellular DNA in the oceanic sediments are unknown. Our global estimates indicate that up to 0.45 gigatons of extracellular DNA are present in the top 10 centimeters of deep-sea sediments, representing the largest reservoir of DNA in the world oceans. We demonstrate that extracellular DNA accounts for about one fifth of the total organic phosphorus regeneration and provides almost half of the prokaryotic demand for organic phosphorus. It therefore plays a key role in deep-sea ecosystem functioning on a global scale.