硝化作用
化学
光化学
辐照
氨
光敏性
亚硝酸盐
生物物理学
生物化学
生物
材料科学
氮气
硝酸盐
光电子学
有机化学
物理
核物理学
作者
Ru Zheng,Yiming Feng,Lingrui Kong,Xiaogang Wu,Jianhang Zhou,Liguo Zhang,Sitong Liu
出处
期刊:Water Research
[Elsevier]
日期:2024-02-01
卷期号:: 121381-121381
被引量:1
标识
DOI:10.1016/j.watres.2024.121381
摘要
The role of ray radiation from the sunlight acting on organisms has long-term been investigated. However, how the light with different wavelengths affects nitrification and the involved nitrifiers are still elusive. Here, we found more than 60% of differentially expressed genes (DEGs) in nitrifiers were observed under irradiation of blue light with wavelengths of 440-480 nm, which were 13.4% and 20.3% under red light and white light irradiation respectively. Blue light was more helpful to achieve partial nitrification rather than white light or red light, where ammonium oxidization by ammonia-oxidizing archaea (AOA) with the increased relative abundance from 8.6% to 14.2% played a vital role. This was further evidenced by the enhanced TCA cycle, reactive oxygen species (ROS) scavenge and DNA repair capacity in AOA under blue-light irradiation. In contrast, nitrite-oxidizing bacteria (NOB) was inhibited severely to achieve partial nitrification, and the newly discovered encoded blue light photoreceptor proteins made them more sensitive to blue light and hindered cell activity. Ammonia-oxidizing bacteria (AOB) expressed genes for DNA repair capacity under blue-light irradiation, which ensured their tiny impact by light irradiation. This study provided valuable insights into the photosensitivity mechanism of nitrifiers and shed light on the diverse regulatory by light with different radiation wavelengths in artificial systems, broadening our comprehension of the nitrogen cycle on earth.
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