Elevated CO2 shifts the functional structure and metabolic potentials of soil microbial communities in a C4 agroecosystem

Scientific Reports
Jinbo XiongJizhong Zhou

Abstract

Atmospheric CO2 concentration is continuously increasing, and previous studies have shown that elevated CO2 (eCO2) significantly impacts C3 plants and their soil microbial communities. However, little is known about effects of eCO2 on the compositional and functional structure, and metabolic potential of soil microbial communities under C4 plants. Here we showed that a C4 maize agroecosystem exposed to eCO2 for eight years shifted the functional and phylogenetic structure of soil microbial communities at both soil depths (0-5 cm and 5-15 cm) using EcoPlate and functional gene array (GeoChip 3.0) analyses. The abundances of key genes involved in carbon (C), nitrogen (N) and phosphorus (P) cycling were significantly stimulated under eCO2 at both soil depths, although some differences in carbon utilization patterns were observed between the two soil depths. Consistently, CO2 was found to be the dominant factor explaining 11.9% of the structural variation of functional genes, while depth and the interaction of depth and CO2 explained 5.2% and 3.8%, respectively. This study implies that eCO2 has profound effects on the functional structure and metabolic potential/activity of soil microbial communities associated with C4 plants, poss...Continue Reading

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Citations

May 8, 2015·Applied Microbiology and Biotechnology·Jinbo XiongDemin Zhang
Jun 10, 2020·Applied Microbiology and Biotechnology·Wenfang DaiChunlin Wang
Aug 30, 2018·Frontiers in Microbiology·Hao YuJizhong Zhou
Sep 2, 2020·Environment International·Zhili HeJizhong Zhou

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Methods Mentioned

BETA
chips

Software Mentioned

EcoPlate
GeoChip
OminLog System
PERMANOVA
R
vegan

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