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| 1 | Identification of bacteria-derived urease in the coral gastric cavity显示文摘Nitrogen cycle is critical to maintain a healthy coral reef ecosystem.Urea can provide a source of nitrogen for coral holobiont and is important for coral calcification through degradation by urease.Despite the involvement of coral-associated bacteria in nitrogen fixation,nitrification and denitrification are well recognized,to what extend urea degradation by bacteria contributing to the urea utilization by coral holobiont remains to be investigated.In this study,we demonstrate that the urea utilization is a common feature of Halomonas spp.that is a dominant genus in cultivable coral-associated bacteria.A urease operon was characterized by genome sequencing and gene knock-out technique in Halomonas meridiana SCSIO 43005,isolated from the gastric cavity of healthy scleractinian coral Galaxea fascicularis.H.meridiana showed high urease activity which was induced by urea and deletion of the urease operon reduced the capability to use urea as solo nitrogen source.Furthermore,approximately 1/3 coral-associated bacteria in the IMG/M database possess complete urease operons indicating the involvement of bacteria-derived ureases in coral holobiont.These results suggest that urease from coral-associated bacteria might be important player in the nitrogen cycling of coral reefs. | Yiqing ZHOU Kaihao TANG Pengxia WANG Weiquan WANG Yan WANG Xiaoxue WANG | 2020 | Science China Earth Sciences2020，63，10： | 0 |
| 2 | 珊瑚礁相关病毒的研究进展显示文摘珊瑚礁被称为海洋中的“热带雨林”,是海洋生态系统中的核心组成部分之一。珊瑚礁病毒包含珊瑚本身感染的病毒和珊瑚共生生物(如藻类、细菌等)感染的病毒,对于珊瑚礁健康与疾病、生长与死亡起着独特而重要的作用,在维持珊瑚礁生态系统的物质循环和能量流动等生态学功能方面起着潜在作用。由于技术的局限以及关注度较低等原因,有关珊瑚礁病毒的研究较少。近年来,随着高通量测序技术的发展,宏转录组和宏基因组逐渐成为研究珊瑚礁病毒多样性及其生态学功能的重要方法之一。本文对国内外相关研究进行总结和归纳,拟为珊瑚礁病毒后续研究提供新的方向和思路,同时指导我国珊瑚礁的保护以及修复。 | 陈骁 王晨 叶沛沅 颜云榕 | 2021 | 广西科学院学报2021，37，3： | 0 |
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