作者简介:徐昭萌(1989-),男,山东济南人,博士研究生,主要从事海洋生物地球化学研究.E-mail:xuzhaomengsky@126.com
收稿日期: 2017-01-16
修回日期: 2017-06-30
网络出版日期: 2017-09-20
基金资助
国家自然科学基金项目“南海北部沉积物中氮循环的关键过程研究”(编号:41376086);泰山学者工程专项经费资助
版权
Advance in Studies on Intracellular Nitrate Storage and Denitrification of Benthic Foraminifera
First author:Xu Zhaomeng (1989- ), male, Ji’nan City, Shandong Province, Ph.D student. Research areas include oceanography and biogeochemistry.E-mail:xuzhaomengsky@126.com
Received date: 2017-01-16
Revised date: 2017-06-30
Online published: 2017-09-20
Supported by
Foundation item:Project supported by the National Natural Science Foundation of China “Nitrogen loss and transformations in the Northern South China Sea” (No.41376086);Special Funds for Taishan Scholars Project
Copyright
底栖有孔虫是第一种被发现能够进行反硝化的真核生物,这突破了人们对真核生物代谢方式的认识。大量研究证明底栖有孔虫对于沉积物的反硝化贡献甚至远超过原核生物,有孔虫细胞内储存大量的硝酸盐,其储量远超过间隙水中的硝酸盐,这些发现为沉积物氮循环的传统认识提出了新的挑战。有孔虫体内储存硝酸盐和反硝化的研究,对于认识真核生物在无氧环境下生存代谢的机理以及更精确地量化海洋氮收支有非常重要的意义。介绍了底栖有孔虫细胞内储存硝酸盐和反硝化的发现过程,并且对不同海区有孔虫体内储存硝酸盐和整体反硝化速率进行对比讨论,同时还总结了目前有孔虫体内储存硝酸盐和反硝化机理的最新研究进展,最后探讨了该研究领域还存在的一些问题以及需要进一步开展的工作。
徐昭萌 , 刘素美 . 底栖有孔虫体内储存硝酸盐和反硝化研究进展[J]. 地球科学进展, 2017 , 32(9) : 949 -958 . DOI: 10.11867/j.issn.1001-8166.2017.09.0949
Benthic foraminifera is the first kind of eukaryotes reported to carry on denitrification, which breaks the understanding of the eukaryotic metabolic way. Numerous studies have demonstrated that the contribution of benthic foraminifera to sedimentary denitrification exceeds the prokaryotes. Furthermore, benthic foraminifera stores large amount of nitrate intracellularly, which far exceeds the amount of nitrate in pore water. These findings challenge our understanding of the nitrogen cycle in sediments. The study of foraminiferal intracellular nitrate storage and denitrification is significant to figure out the metabolic way of eukaryote in anoxic environment and to quantify the balance of nitrogen in marine environment. The history of foraminiferal intracellular nitrate storage and denitrification study was discussed. In addition, the distribution of foraminiferal intracellular nitrate and denitrification rates in marine environment was also discussed. The latest research progresses about the related mechanism were also summarized. Finally, the problems and challenges in present and future studies were discussed.
Key words： Benthic foraminifera; Nitrate Storage; Denitrification.
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