文献类型：期刊文献

英文题名：Accelerated nitrification and altered community structure of ammonia-oxidizing microorganisms in the saline-alkali tolerant rice rhizosphere of coastal solonchaks

作者：Zhen, Zhen[1,2];Li, Gaoyang[1];Chen, Yijie[1];Wei, Ting[1];Li, Huijun[1];Huang, Fengcheng[1];Huang, Yongxiang[1,2];Ren, Lei[1];Liang, Yanqiu[3];Zhang, Dayi[4];Lin, Zhong[3,5];Li, Zhe[6]

机构：[1]Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China;[2]Natl Saline Alkali Tolerant Rice Technol Innovat C, South China Branch, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[4]Jilin Univ, Coll New Energy & Environm, Changchun 130021, Peoples R China;[5]Shenzhen Res Inst Guangdong Ocean Univ, Shenzhen 518108, Peoples R China;[6]Qilu Univ Technol, Biol Inst, Shandong Acad Sci, Jinan 250014, Peoples R China

年份：2023

卷号：189

外文期刊名：APPLIED SOIL ECOLOGY

收录：SCI-EXPANDED(收录号：WOS:001017067800001)、、Scopus(收录号：2-s2.0-85160432299)、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (41977125, 41907033), the Natural Science Foundation of Guangdong Province (2022A1515010867, 2022A1515010630 and 2019A1515011948), the Program for Innovation Team in the University of Jinan (2019GXRC033), and the Natural Science Foundation of Shandong Province (ZR202102270296).

语种：英文

外文关键词：Ammonia-oxidizing bacteria; Ammonia-oxidizing archaea; amoA gene; Salt stress

外文摘要：Plantations of saline-alkali tolerant rice in coastal areas are proposed as a strategy to improve rice yield and ensure global food security. The soil nitrification process driven by ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) is an integral part of the soil nitrogen cycle and correlates with the quality of coastal solonchak. However, little is known about the effects of saline-alkali tolerant rice cultivation on the soil nitrification process in coastal solonchaks. In this study, we investigated the community structures of AOA/AOB and the nitrification rate in the rice rhizosphere along salinity gradients. The abundance and nitrification rates of AOA and AOB declined with increasing salinity. Saline-alkali-tolerant rice cultivation significantly increased the abundance of AOA and AOB amoA genes from (3.09-11.5) x 106 and (7.76-52.0) x 105 copies g-1 in soils to (16.2-50.9) x 106 and (69.2-423) x 105 copies g-1 in the rhizosphere, respectively. Compared with bulk soils, the nitrification rate of AOA and AOB in the rhizosphere increased significantly with salinity. Saline-alkalitolerant rice cultivation enhanced the nitrification process of saline-alkali tolerant soil by increasing the nitrification contribution of AOB. Our findings offer new clues on the accelerated nitrification process in the salinealkali tolerant rice rhizosphere in coastal solonchaks and reveal its roles in shaping AOA/AOB communities, providing suggestions for saline-alkali tolerant rice plantations in coastal solonchaks.