Details
| Original language | English |
|---|---|
| Article number | 108785 |
| Journal | Soil Biology and Biochemistry |
| Volume | 173 |
| Early online date | 7 Aug 2022 |
| Publication status | Published - Oct 2022 |
Abstract
Identifying the core taxa involved in the utilization of plant straw or/and rhizodeposits is key to understanding the microbial mechanisms underlying the turnover of these plant-derived organic matters, known as the “brown” path and “green” path, respectively. However, this still remains a challenge, primarily due to methodological limitations. By adopting a novel experimental design of parallel 13C-labelling and DNA-SIP, we identified microorganisms that utilized rhizodeposits and plant straw in soils containing these two plant-derived substances. Additionally, to compare straw utilizers in the soil without plants (straw only) and with plants (straw plus rhizodeposits), we investigated the shift of these substrate-stimulated communities (e.g., straw utilizers) in the presence of live maize plants. Here we showed that i) rhizodeposits were used by a wide range of root-associated microorganisms but plant straw was mainly utilized by oligotrophs, e.g., Arthrobacter, when these two plant-derived substances were co-present; and ii) there was a shift in the bacterial straw utilizer community, e.g., Streptomyces, and their physiological metabolism from saprotrophy to symbiosis when maize plants were present. This study identified distinct utilizers of plant-derived substances, i.e. straw or rhizodeposits, and revealed the shift of soil bacterial community and metabolisms along the autotroph -saprotroph -mutualism continuum.
Keywords
- Bacterial life strategy, ContinuousCO labeling, DNA-SIP, Keystone microbiota, Plant-derived carbon
ASJC Scopus subject areas
- Immunology and Microbiology(all)
- Microbiology
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Soil Biology and Biochemistry, Vol. 173, 108785, 10.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Succession of the soil bacterial community as resource utilization shifts from plant residues to rhizodeposits
AU - Fu, Yingyi
AU - Luo, Yu
AU - Tang, Caixian
AU - Li, Yong
AU - Guggenberger, Georg
AU - Xu, Jianming
N1 - Funding Information: This study was supported by the National Science Foundation of China ( U1901601 ) and Zhejiang Provincial Natural Science Foundation of China under Grant Number of R19D010005 .
PY - 2022/10
Y1 - 2022/10
N2 - Identifying the core taxa involved in the utilization of plant straw or/and rhizodeposits is key to understanding the microbial mechanisms underlying the turnover of these plant-derived organic matters, known as the “brown” path and “green” path, respectively. However, this still remains a challenge, primarily due to methodological limitations. By adopting a novel experimental design of parallel 13C-labelling and DNA-SIP, we identified microorganisms that utilized rhizodeposits and plant straw in soils containing these two plant-derived substances. Additionally, to compare straw utilizers in the soil without plants (straw only) and with plants (straw plus rhizodeposits), we investigated the shift of these substrate-stimulated communities (e.g., straw utilizers) in the presence of live maize plants. Here we showed that i) rhizodeposits were used by a wide range of root-associated microorganisms but plant straw was mainly utilized by oligotrophs, e.g., Arthrobacter, when these two plant-derived substances were co-present; and ii) there was a shift in the bacterial straw utilizer community, e.g., Streptomyces, and their physiological metabolism from saprotrophy to symbiosis when maize plants were present. This study identified distinct utilizers of plant-derived substances, i.e. straw or rhizodeposits, and revealed the shift of soil bacterial community and metabolisms along the autotroph -saprotroph -mutualism continuum.
AB - Identifying the core taxa involved in the utilization of plant straw or/and rhizodeposits is key to understanding the microbial mechanisms underlying the turnover of these plant-derived organic matters, known as the “brown” path and “green” path, respectively. However, this still remains a challenge, primarily due to methodological limitations. By adopting a novel experimental design of parallel 13C-labelling and DNA-SIP, we identified microorganisms that utilized rhizodeposits and plant straw in soils containing these two plant-derived substances. Additionally, to compare straw utilizers in the soil without plants (straw only) and with plants (straw plus rhizodeposits), we investigated the shift of these substrate-stimulated communities (e.g., straw utilizers) in the presence of live maize plants. Here we showed that i) rhizodeposits were used by a wide range of root-associated microorganisms but plant straw was mainly utilized by oligotrophs, e.g., Arthrobacter, when these two plant-derived substances were co-present; and ii) there was a shift in the bacterial straw utilizer community, e.g., Streptomyces, and their physiological metabolism from saprotrophy to symbiosis when maize plants were present. This study identified distinct utilizers of plant-derived substances, i.e. straw or rhizodeposits, and revealed the shift of soil bacterial community and metabolisms along the autotroph -saprotroph -mutualism continuum.
KW - Bacterial life strategy
KW - ContinuousCO labeling
KW - DNA-SIP
KW - Keystone microbiota
KW - Plant-derived carbon
UR - http://www.scopus.com/inward/record.url?scp=85135706624&partnerID=8YFLogxK
U2 - 10.1016/j.soilbio.2022.108785
DO - 10.1016/j.soilbio.2022.108785
M3 - Article
AN - SCOPUS:85135706624
VL - 173
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
SN - 0038-0717
M1 - 108785
ER -