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Yang Y, Zhao Y, Pan M, Yu Y, Guo Y, Ge Q, Hao W. Physiology and transcriptome analysis of Artemisia argyi adaptation and accumulation to soil cadmium. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 278:116397. [PMID: 38714088 DOI: 10.1016/j.ecoenv.2024.116397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 05/09/2024]
Abstract
The soil pollution caused by cadmium (Cd) poses a significant threat to the environment. Therefore, identifying plants that can effectively remediate Cd-contaminated soils is urgently needed. In this study, physiological, cytological, and transcriptome analyses were performed to comprehensively understand the changes in Artemisia argyi under Cd stress. Physiological and cytological analyses indicated that A. argyi maintained normal growth with intact cell structure under Cd stress levels up to 10 mg/kg. Cytological analysis showed that Cd precipitation in leaf cells occurred in the cytoplasm and intercellular spaces. As the levels of Cd stress increased, proline accumulation in leaves increased, whereas soluble protein and soluble sugar initially increased, followed by a subsequent decline. The translocation factor was above 1 under 0.6 mg/kg Cd stress but decreased when it exceeded this concentration. Transcriptome analyses revealed several crucial Cd-influenced pathways, including amino acid, terpenoid, flavonoid, and sugar metabolisms. This study not only proved that A. argyi could enrich Cd in soil but also revealed the response of A. argyi to Cd and its resistance mechanisms, which provided insight into the cleaner production of A. argyi and the remediation of Cd-contaminated soil.
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Affiliation(s)
- Yingbin Yang
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yinghui Zhao
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Meiqi Pan
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yaxin Yu
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu Guo
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Qing Ge
- College of Enology, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Wenfang Hao
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Gautam H, Sharma A, Trivedi PK. The role of flavonols in insect resistance and stress response. CURRENT OPINION IN PLANT BIOLOGY 2023; 73:102353. [PMID: 37001187 DOI: 10.1016/j.pbi.2023.102353] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/25/2023] [Accepted: 02/27/2023] [Indexed: 06/10/2023]
Abstract
Plants are sessile organisms and must adapt to various environmental changes, especially from stress conditions. Synthesis of secondary metabolites by the plant is one of the adaptive mechanisms against stress to provide resistance. Among several secondary metabolites, flavonols, a subgroup of flavonoids, are one of the most widely distributed in the plant kingdom. These molecules work as antioxidants, reduce reactive oxygen species (ROS) in plants, and cause detrimental effects on insect growth on feeding. Despite the great interest in flavonol function leading to insect tolerance and stress response, the detailed mechanisms related to these specific functions have yet to be studied. In this review, we have summarized the role of flavonols in plant defense against insects and different abiotic stresses and possible mechanisms involved in these functions.
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Affiliation(s)
- Himanshi Gautam
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow-226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ashish Sharma
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow-226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India; Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India
| | - Prabodh Kumar Trivedi
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow-226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India; Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, India.
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3
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Huang B, Cui J, Ran Y, Chen C, Li F, Zhang Y, Li Z, Xie E. Mechanism of macroalgae Gracilaria bailiniae responding to cadmium and lanthanum. FRONTIERS IN PLANT SCIENCE 2022; 13:1076526. [PMID: 36531398 PMCID: PMC9756850 DOI: 10.3389/fpls.2022.1076526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Macroalgae can accumulate a wide array of metals, leading to their appliance as biomonitors of aquatic environments. With the rapid development of industrial and agricultural-based activities, Cd pollution in aquatic environments is considered an increasingly severe problem worldwide. Although La could alleviate the Cd stress in higher terrestrial plants, the response mechanisms of macroalgae to Cd and La are unknown. Along these lines, in this work, Cd significantly affected the growth, internal cellular structure, photosynthesis, pigment content, antioxidant enzyme activity, and lipid peroxidation level of G. bailiniae. However, the presence of La alleviated these adverse effects from Cd. Furthermore, the response mechanism of G. bailiniae to Cd was attributed to the self-antioxidant ability enhancement, membrane defense, and programmed-cellular regulation. However, the presence of La mediated the biosynthesis of both flavonoids and lipids, which inhibited the Cd accumulation, modulated algal stress signalling networks, renewed the impaired chlorophyll molecule, maintained the activity of the crucial enzyme, enhanced antioxidant ability, and maintained the stabilization of redox homeostasis, alleviating the adverse impact from Cd and improve the growth of G. bailiniae. The experimental results successfully demonstrate a new detoxicant to alleviate Cd stress, promoting a more comprehensive array of macroalgal applications.
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Affiliation(s)
- Bowen Huang
- Fishery College, Guangdong Ocean University, Zhanjiang, China
- Guangdong Laboratory of Marine Ecology Environment Monitoring and Warning, Zhanjiang, China
| | - Jianjun Cui
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Yu Ran
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Chunli Chen
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Feng Li
- Fishery College, Guangdong Ocean University, Zhanjiang, China
- Guangdong Laboratory of Marine Ecology Environment Monitoring and Warning, Zhanjiang, China
| | - Yulei Zhang
- Fishery College, Guangdong Ocean University, Zhanjiang, China
- Guangdong Laboratory of Marine Ecology Environment Monitoring and Warning, Zhanjiang, China
| | - Zailiang Li
- Fishery College, Guangdong Ocean University, Zhanjiang, China
| | - Enyi Xie
- Fishery College, Guangdong Ocean University, Zhanjiang, China
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Wang Q, Lu X, Chen X, Zhao L, Han M, Wang S, Zhang Y, Fan Y, Ye W. Genome-wide identification and function analysis of HMAD gene family in cotton (Gossypium spp.). BMC PLANT BIOLOGY 2021; 21:386. [PMID: 34416873 PMCID: PMC8377987 DOI: 10.1186/s12870-021-03170-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND The abiotic stress such as soil salinization and heavy metal toxicity has posed a major threat to sustainable crop production worldwide. Previous studies revealed that halophytes were supposed to tolerate other stress including heavy metal toxicity. Though HMAD (heavy-metal-associated domain) was reported to play various important functions in Arabidopsis, little is known in Gossypium. RESULTS A total of 169 G. hirsutum genes were identified belonging to the HMAD gene family with the number of amino acids ranged from 56 to 1011. Additionally, 84, 76 and 159 HMAD genes were identified in each G. arboreum, G. raimondii and G. barbadense, respectively. The phylogenetic tree analysis showed that the HMAD gene family were divided into five classes, and 87 orthologs of HMAD genes were identified in four Gossypium species, such as genes Gh_D08G1950 and Gh_A08G2387 of G. hirsutum are orthologs of the Gorai.004G210800.1 and Cotton_A_25987 gene in G. raimondii and G. arboreum, respectively. In addition, 15 genes were lost during evolution. Furthermore, conserved sequence analysis found the conserved catalytic center containing an anion binding (CXXC) box. The HMAD gene family showed a differential expression levels among different tissues and developmental stages in G. hirsutum with the different cis-elements for abiotic stress. CONCLUSIONS Current study provided important information about HMAD family genes under salt-stress in Gossypium genome, which would be useful to understand its putative functions in different species of cotton.
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Affiliation(s)
- Qinqin Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Xuke Lu
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Xiugui Chen
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Lanjie Zhao
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Mingge Han
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Shuai Wang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Yuexin Zhang
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Yapeng Fan
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
| | - Wuwei Ye
- Institute of Cotton Research of Chinese Academy of Agricultural Sciences / Research Base, Zhengzhou University, State Key Laboratory of Cotton Biology / Key Laboratory for Cotton Genetic Improvement, MOA, Anyang, Henan 455000 China
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Zhang X, Herger AG, Ren Z, Li X, Cui Z. Resistance effect of flavonols and toxicology analysis of hexabromocyclododecane based on soil-microbe-plant system. CHEMOSPHERE 2020; 257:127248. [PMID: 32526471 DOI: 10.1016/j.chemosphere.2020.127248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/16/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
The toxicity characteristics of HBCD and resistance mechanism of flavonols are investigated based on physiological and metagenomic analysis. Toxicology research of HBCD on Arabidopsis thaliana (Col and fls1-3) not only shows the toxic effect of HBCD on plants, but also indicates that flavonols could improve plant resistance to HBCD, including root length, shoot biomass and chlorophyll content. Analysis of eggNOG and GO enrichment demonstrates that HBCD has toxic effect on both gene expression and protein function, which concentrates on energy production - conversion and amino acid transport - metabolism. Differential expressed genes in flavonols-treated groups indicates that flavonols regulate the metabolism of amino acids, cofactors and vitamins, which is involved in plant defense system against oxidative damage caused by HBCD stress. HBCD is believed to affect the synthesis of proteins via genes expression of ribosome biogenesis process. Flavonols could strengthen the plant resistance and alleviate toxic effect under HBCD stress.
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Affiliation(s)
- Xu Zhang
- School of Architecture and Urban Planning, Shandong Jianzhu University, Ji'nan, 250101, China.
| | - Aline Galatea Herger
- Department of Plant and Microbial Biology, University of Zurich, Zurich, 8008, Switzerland
| | - Zhen Ren
- School of Architecture and Urban Planning, Shandong Jianzhu University, Ji'nan, 250101, China
| | - Xinxin Li
- College of Agriculture and Life Sciences, Cornell University, New York, 14850, USA
| | - Zhaojie Cui
- Department of Plant and Microbial Biology, University of Zurich, Zurich, 8008, Switzerland
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6
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Zhang X, Yang H, Schaufelberger M, Li X, Cao Q, Xiao H, Ren Z. Role of Flavonol Synthesized by Nucleus FLS1 in Arabidopsis Resistance to Pb Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:9646-9653. [PMID: 32786845 DOI: 10.1021/acs.jafc.0c02848] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lead (Pb) is an important pollutant of worldwide concern with respect to extensive pollution sources and highly toxic effect. Flavonol can improve plant resistance to abiotic stress and is also responsible for the alleviating effect under Pb stress. The relationship between Pb stress and flavonol and the knowledge about the mechanisms of flavonol function are very limited. Pb affected the energy metabolism process and, thus, inhibited plant growth and development. Flavonol accumulation controlled by FLS1 (flavonol synthase) could alleviate the toxic effect. Importantly, nes (mutant of NES that allows FLS1 to enter the nucleus expression) showed better growth status and lighter oxidative damage than NES (N-terminal nucleus exclusion signal peptide prevents FLS1 from entering the nucleus expression), which indicated that nucleus flavonol synthesized by nucleus FLS1 plays a key role in plant resistance to Pb stress. Although FLS1 signals were detected in the cell membrane, cytoplasm, and nucleus, membrane flavonol, cytoplasm flavonol, and nucleus flavonol were not exercising their function in the corresponding position. The expression of nucleus FLS1 intervened in the total content and composition of flavonol. The results also revealed that nucleus flavonol could regulate the ascorbate metabolism for alleviating the damage on the chloroplast, thus maintaining the photophosphorylation pathway. Our findings provided new insights for the molecular basis of Pb tolerance and response mechanism of the plant.
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Affiliation(s)
- Xu Zhang
- School of Architecture and Urban Planning, Shandong Jianzhu University, Jinan, Shandong 250101, People's Republic of China
| | - Huanhuan Yang
- School of Life Sciences, Shandong University, Qingdao, Shandong 266237, People's Republic of China
| | - Myriam Schaufelberger
- Department of Plant and Microbial Biology, University of Zurich, 8008 Zürich, Switzerland
| | - Xinxin Li
- College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14850, United States
| | - Qingqing Cao
- School of Architecture and Urban Planning, Shandong Jianzhu University, Jinan, Shandong 250101, People's Republic of China
| | - Huabin Xiao
- School of Architecture and Urban Planning, Shandong Jianzhu University, Jinan, Shandong 250101, People's Republic of China
| | - Zhen Ren
- School of Architecture and Urban Planning, Shandong Jianzhu University, Jinan, Shandong 250101, People's Republic of China
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7
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Cai Y, Chen H, Yuan R, Wang F, Chen Z, Zhou B. Metagenomic analysis of soil microbial community under PFOA and PFOS stress. ENVIRONMENTAL RESEARCH 2020; 188:109838. [PMID: 32798955 DOI: 10.1016/j.envres.2020.109838] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/29/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
Perfluorinated compounds (PFCs) contamination of soil has attracted global attention in recent years but influences of PFCs on microorganisms in the soil environment have not been fully described. In this study, the effects of perfluorooctane sulphonate (PFOS) and perfluoroctanoic acid (PFOA) on bacterial communities were determined by Illumina Miseq sequencing and Illumina Hiseq Xten. The stimulation of PFCs pollutants on soil bacterial richness and community diversity were observed. Sequencing information indicated that Proteobacteria, Acidobacteria, Actinobacteria, Chloroflexi, Firmicutes, and Gemmatimonadetes were the dominant bacterial phyla. Two genera, Bacillus and Sphingomonas, exhibited adverse responses toward PFCs pollution. Carbohydrate-active enzymes (CAZy), Kyoto Encyclopedia of Genes and Genomes (KEGG) and NCBI databases were used to elucidate the proteins and function action of soil microbial to PFCs pollution. Pathways such as Carbohydrate metabolism, Global and overview maps and Membrane transport in the soil microbes were affected by PFCs stress. CAZy analysis revealed that glycosyl transferases (GTs) in PFCs-polluted soils showed more active, while glycoside hydrolases (GHs) were inhibited severely.
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Affiliation(s)
- Yanping Cai
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huilun Chen
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Rongfang Yuan
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Fei Wang
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zhongbing Chen
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500, Prague, Czech Republic
| | - Beihai Zhou
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
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Geng S, Fu W, Chen W, Zheng S, Gao Q, Wang J, Ge X. Effects of an external magnetic field on microbial functional genes and metabolism of activated sludge based on metagenomic sequencing. Sci Rep 2020; 10:8818. [PMID: 32483239 PMCID: PMC7264255 DOI: 10.1038/s41598-020-65795-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/11/2020] [Indexed: 11/27/2022] Open
Abstract
This study explored the effect of 70-mT magnetic field on wastewater treatment capacity for activated sludge in long-term laboratory-scale experiments. Metagenomic sequencing were conducted based on Illumina HiSeq 2000 platform after DNA extraction of the activated sludge. Then the effect of the magnetic field on the microbial unigene and metabolic pathways in activated sludge was investigated. As a result, higher pollutant removal was observed at 70 mT, with which the elimination of total nitrogen (TN) was the most effective. Functional genes annotated based on eggNOG database showed that unigenes related to information storage and processing were enhanced by the magnetic field. For CAZy classification, category such as glycosyl transferases was more abundant in the reactor with magnetic field, which has been shown to promote the entire energy supply pathway. Additionally, in the KEGG categories, unigenes related to signaling molecules and interaction were significantly inhibited. Through the enrichment analysis of the nitrogen metabolism pathway, the magnetic field inhibited anabolic nitrate reduction by significantly inhibiting enzymes such as [EC:1.7.7.2], [EC:1.7.7.1], [EC:3.5.5.1], [EC:1.4.1.2] and [EC:4.2.1.1], which are related to the improvement of the denitrification ability. This study can provide insight for future research on the response mechanism of activated sludge to magnetic fields.
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Affiliation(s)
- Shuying Geng
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China.,College of Water Sciences, Beijing Normal University, Beijing, 100875, China
| | - Weizhang Fu
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China.
| | - Weifeng Chen
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China.
| | - Shulian Zheng
- Taian Chuanyuan Environmental Protection Equipment Co., Ltd, Taian, 271000, China
| | - Qi Gao
- College of Food Science and Engineering, Shandong Agriculture and Engineering University, Dezhou, 251100, China
| | - Jing Wang
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China
| | - Xiaohong Ge
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, China
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Li J, Gu T, Li L, Wu X, Shen L, Yu R, Liu Y, Qiu G, Zeng W. Complete genome sequencing and comparative genomic analyses of Bacillus sp. S3, a novel hyper Sb(III)-oxidizing bacterium. BMC Microbiol 2020; 20:106. [PMID: 32354325 PMCID: PMC7193398 DOI: 10.1186/s12866-020-01737-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 02/25/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Antimonite [Sb(III)]-oxidizing bacterium has great potential in the environmental bioremediation of Sb-polluted sites. Bacillus sp. S3 that was previously isolated from antimony-contaminated soil displayed high Sb(III) resistance and Sb(III) oxidation efficiency. However, the genomic information and evolutionary feature of Bacillus sp. S3 are very scarce. RESULTS Here, we identified a 5,436,472 bp chromosome with 40.30% GC content and a 241,339 bp plasmid with 36.74% GC content in the complete genome of Bacillus sp. S3. Genomic annotation showed that Bacillus sp. S3 contained a key aioB gene potentially encoding As (III)/Sb(III) oxidase, which was not shared with other Bacillus strains. Furthermore, a wide variety of genes associated with Sb(III) and other heavy metal (loid) s were also ascertained in Bacillus sp. S3, reflecting its adaptive advantage for growth in the harsh eco-environment. Based on the analysis of phylogenetic relationship and the average nucleotide identities (ANI), Bacillus sp. S3 was proved to a novel species within the Bacillus genus. The majority of mobile genetic elements (MGEs) mainly distributed on chromosomes within the Bacillus genus. Pan-genome analysis showed that the 45 genomes contained 554 core genes and many unique genes were dissected in analyzed genomes. Whole genomic alignment showed that Bacillus genus underwent frequently large-scale evolutionary events. In addition, the origin and evolution analysis of Sb(III)-resistance genes revealed the evolutionary relationships and horizontal gene transfer (HGT) events among the Bacillus genus. The assessment of functionality of heavy metal (loid) s resistance genes emphasized its indispensable role in the harsh eco-environment of Bacillus genus. Real-time quantitative PCR (RT-qPCR) analysis indicated that Sb(III)-related genes were all induced under the Sb(III) stress, while arsC gene was down-regulated. CONCLUSIONS The results in this study shed light on the molecular mechanisms of Bacillus sp. S3 coping with Sb(III), extended our understanding on the evolutionary relationships between Bacillus sp. S3 and other closely related species, and further enriched the Sb(III) resistance genetic data sources.
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Affiliation(s)
- Jiaokun Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Tianyuan Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Liangzhi Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Runlan Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Yuandong Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Guanzhou Qiu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China. .,Key Laboratory of Biometallurgy, Ministry of Education, Central South University, Changsha, 410083, China.
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10
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Wang C, Chen Y, Zhou H, Li X, Tan Z. Adaptation mechanisms of Rhodococcus sp. CNS16 under different temperature gradients: Physiological and transcriptome. CHEMOSPHERE 2020; 238:124571. [PMID: 31472351 DOI: 10.1016/j.chemosphere.2019.124571] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Rhodococcus exhibits strong adaptability to environmental stressors and plays a crucial role in environmental bioremediation. However, seasonal changes in ambient temperature, especially rapid temperature drops exert an adverse effect on in situ bioremediation. In this paper, we studied the cell morphology and fatty acid composition of an aniline-degrading strain Rhodococcus sp. CNS16 at temperatures of 30 °C, 20 °C, and 10 °C. At suboptimal temperatures, cell morphology of CNS16 changed from short rod-shaped to long rod or irregular shaped, and the proportion of unsaturated fatty acids was upregulated. Transcriptomic technologies were then utilized to gain detailed insights into the adaptive mechanisms of CNS16 subjected to suboptimal temperatures. The results showed that the number of gene responses was significantly higher at 10 °C than that at 20 °C. The inhibition of peptidoglycan synthase expression and up-regulation of Filamentous Temperature Sensitive as well as unsaturated fatty acid synthesis genes at suboptimal temperatures might be closely related to corresponding changes in cell morphology and fatty acids composition. Strain CNS16 showed loss of catalase and superoxide dismutase activity, and utilized thioredoxin-dependent thiol peroxidase to resist oxidative stress. The up-regulation of carotenoid and Vitamin B2 synthesis at 10 °C might also be involved in the resistance to oxidative stress. Amino acid metabolism, coenzyme and vitamin metabolism, ABC transport, and energy metabolism are essential for peptidoglycan synthesis and regulation of cellular metabolism; therefore, synergistically resisting environmental stress. This study provides a mechanistic basis for the regulation of aniline degradation in Rhodococcus sp. CNS16 at low temperatures.
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Affiliation(s)
- Chen Wang
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Yangwu Chen
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China
| | - Houzhen Zhou
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China
| | - Xudong Li
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China
| | - Zhouliang Tan
- Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China; Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, 610041, Chengdu, China.
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