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Sui J, Li C, Wang Y, Li X, Liu R, Hua X, Liu X, Qi H. Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar. Microorganisms 2023; 12:58. [PMID: 38257884 PMCID: PMC10820384 DOI: 10.3390/microorganisms12010058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/25/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024] Open
Abstract
The cultivation of poplar trees is hindered by persistent cropping challenges, resulting in reduced wood productivity and increased susceptibility to soil-borne diseases. These issues primarily arise from alterations in microbial structure and the infiltration of pathogenic fungi. To investigate the impact on soil fertility, we conducted an analysis using soil samples from both perennial poplar trees and three successive generations of continuously cropped poplar trees. The quantity and community composition of bacteria and fungi in the rhizosphere were assessed using the Illumina MiSeq platform. The objective of this study is to elucidate the impact of continuous cropping challenges on soil fertility and rhizosphere microorganisms in poplar trees, thereby establishing a theoretical foundation for investigating the mechanisms underlying these challenges. The study found that the total bacteria in the BT group is 0.42 times higher than the CK group, and the total fungi is 0.33 times lower than the CK group. The BT and CK groups presented relatively similar bacterial richness and diversity, while the indices showed a significant (p < 0.05) higher fungal richness and diversity in the CK group. The fractions of Bacillus were 2.22% and 2.41% in the BT and CK groups, respectively. There was a 35.29% fraction of Inocybe in the BT group, whereas this was barely observed in the CK group. The fractions of Geopora were 26.25% and 5.99%, respectively in the BT and CK groups. Modifying the microbial community structure in soil subjected to continuous cropping is deemed as the most effective approach to mitigate the challenges associated with this agricultural practice.
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Affiliation(s)
- Junkang Sui
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Chenyu Li
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Yinping Wang
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xiangyu Li
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Rui Liu
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xuewen Hua
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xunli Liu
- College of Forestry, Shandong Agricultural University, Tai’an 271000, China;
| | - Hui Qi
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
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Kan Y, Zhang L, Wang Y, Ma Q, Zhou Y, Jiang X, Zhang W, Ruan Z. Endophytic Bacterium Flexivirga meconopsidis sp. nov. with Plant Growth-Promoting Function, Isolated from the Seeds of Meconopsis integrifolia. Microorganisms 2023; 11:2899. [PMID: 38138043 PMCID: PMC10745605 DOI: 10.3390/microorganisms11122899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Strain Q11T of an irregular coccoid Gram-positive bacterium, aerobic and non-motile, was isolated from Meconopsis integrifolia seeds. Strain Q11T grew optimally in 1% (w/v) NaCl, pH 7, at 30 °C. Strain Q11T is most closely related to Flexivirga, as evidenced by 16S rRNA gene analysis, and shares the highest similarity with Flexivirga aerilata ID2601ST (99.24%). Based on genome sequence analysis, the average nucleotide identity and digital DNA-DNA hybridization values of strains Q11T and D2601ST were 88.82% and 36.20%, respectively. Additionally, strain Q11T showed the abilities of nitrogen fixation and indole acetic acid production and was shown to promote maize growth under laboratory conditions. Its genome contains antibiotic resistance genes (the vanY gene in the vanB cluster and the vanW gene in the vanI cluster) and extreme environment tolerance genes (ectoine biosynthetic gene cluster). Shotgun proteomics also detected antibiotic resistance proteins (class A beta-lactamases, D-alanine ligase family proteins) and proteins that improve plant cold tolerance (multispecies cold shock proteins). Strain Q11T was determined to be a novel species of the genus Flexivirga, for which the name Flexivirga meconopsidis sp. nov. is proposed. The strain type is Q11T (GDMCC 1.3002T = JCM 36020 T).
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Affiliation(s)
- Yongtao Kan
- College of Life Sciences, Xinjiang Normal University, Urumqi 830017, China;
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Li Zhang
- College of Life Sciences, Yantai University, Yantai 264005, China;
| | - Yan Wang
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- College of Resources and Environment, Tibet Agricultural and Animal Husbandry University, Linzhi 860000, China
| | - Qingyun Ma
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yiqing Zhou
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xu Jiang
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wei Zhang
- College of Life Sciences, Xinjiang Normal University, Urumqi 830017, China;
| | - Zhiyong Ruan
- State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.W.); (Q.M.); (Y.Z.); (X.J.)
- CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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