Wheat rhizodeposition stimulates soil nitrous oxide emission and denitrifiers harboring the nosZ Glade I gene

文献类型： 外文期刊

第一作者： Ai, Chao

作者： Ai, Chao;Zhang, Meiling;Zhang, Liyu;Zeng, Li;Wang, Xiubin;He, Ping;Liang, Guoqing;Zhou, Wei;Sun, Yuanyuan;Sun, Yuanyuan;Zeng, Li;Liu, Yao;Chai, Yanjun

作者机构：

关键词： Nitrous oxide (N2O); nosZ; Rhizodeposition; Stable isotope probing (SIP); Wheat

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：7.609； 五年影响因子：8.312 ）

ISSN： 0038-0717

年卷期： 2020 年 143 卷

页码：

收录情况： SCI

摘要： Stimulatory effects of growing plants on nitrous oxide (N2O) emissions have been widely reported in terrestrial ecosystems, but the potential mechanisms responsible for these effects remain unclear. This study revealed that wheat can induce a 3.5-9.2-fold increase in N2O emissions under different soil fertility levels, and that this "plant" source of N2O occurs in the rhizosphere. Moreover, plants induced soil niche differentiation between denitrifiers harboring the nitrous oxide reductase genes nosZI and nosZII. Pulse labeling of wheat demonstrated that 67% of C-13-labeled nosZI-type denitrifiers, but no nosZII-type denitrifiers, were more abundant in the rhizosphere than in bulk soil. Furthermore, a higher percentage of bacterial genomes containing nitrite reductase genes was found within plant-associated nosZI-type denitrifiers than nosZII-type denitrifiers, favoring NO2- to N2O conversion. Overall, this study revealed a strong selective stimulating effect of wheat on soil denitrifiers through root-derived carbon and a key role of the nosZI-type community in rhizosphere denitrification.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序