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Open AccessArticle

Similar but Not Identical Resuscitation Trajectories of the Soil Microbial Community Based on Either DNA or RNA after Flooding

by Yizu Zhu 1,2,3, Yaying Li 1,2, Ningguo Zheng 1,2,3, Stephen James Chapman 4 and Huaiying Yao 1,2,5,*
1
Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
2
Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo 315800, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
4
The James Hutton Research Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
5
Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430073, China
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 502; https://doi.org/10.3390/agronomy10040502
Received: 2 March 2020 / Revised: 10 March 2020 / Accepted: 25 March 2020 / Published: 2 April 2020
(This article belongs to the Section Water Use and Irrigation)
Both drought and flooding are unfavorable for soil microorganisms, but nevertheless, are highly relevant to the extreme weather events that have been predicted to increase in the future. The switch of soil water status from drought to flooding can happen rapidly and microbial activity might be either stimulated or further inhibited, but we have insufficient understanding of the underlying microbial processes. Here, we tracked the changes in soil bacterial and fungal abundance and their community structures, assaying the total (DNA-based) and potentially active (RNA-based) communities in response to abrupt flooding of dry soil. Also, rates of soil respiration and enzyme activity were measured after flooding. Results showed that the bacterial community was found to be more responsive than the fungal community to flooding. The bacterial community responses were clearly classified into three distinct patterns in which the intermediate pattern displayed highly phylogenetic clustering. A transient flourish of Bacilli which belongs to Firmicutes was detected at 8–48 h of flooding, suggesting its potential importance in the microbial assemblage and subsequent ecosystem functioning. Finally, the accumulative amount of CO2 released was more closely related than enzyme activity to the change in structure of the bacterial community after flooding. In conclusion, these findings extended our understanding of the underlying soil microbial processes following abrupt water condition changes. View Full-Text
Keywords: soil bacteria; soil fungi; microbial activity; DNA; RNA; flooding soil bacteria; soil fungi; microbial activity; DNA; RNA; flooding
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MDPI and ACS Style

Zhu, Y.; Li, Y.; Zheng, N.; Chapman, S.J.; Yao, H. Similar but Not Identical Resuscitation Trajectories of the Soil Microbial Community Based on Either DNA or RNA after Flooding. Agronomy 2020, 10, 502.

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