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Lu D, Shen HL, Wang L, Wan CX. Micromonospora profundi TRM 95458 converts glycerol to a new osmotic compound. Front Microbiol 2023; 14:1236906. [PMID: 37744923 PMCID: PMC10513789 DOI: 10.3389/fmicb.2023.1236906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/11/2023] [Indexed: 09/26/2023] Open
Abstract
Plant growth and agricultural productivity was greatly limited by soil salinity and alkalization. The application of salt-tolerant rhizobacteria could effectively improve plant tolerance to saline-alkali stress. Micromonospora profundi TRM 95458 was obtained from the rhizosphere of chickpea (Cicer arietinum L.) as a moderate salt-tolerant rhizobacteria. A new osmotic compound (ABAGG) was isolated from the fermentation broth of M. profundi TRM 95458. The chemical structure of the new compound was elucidated by analyzing nuclear magnetic resonance (NMR) and high-resolution mass (HRMS) data. M. profundi TRM 95458 could convert glycerol into ABAGG. The accumulation of ABAGG varied depending on the amount of glycerol and glycine added to the fermentation medium. In addition, the concentration of NaCl affected the ABAGG content obviously. The highest yield of ABAGG was observed when the salt content of the fermentation medium was 10 g/L. The study indicated that salt stress led to the accumulation of ABAGG using glycerol and glycine as substrates, suggesting ABAGG might aid in the survival and adaptation of the strain in saline-alkaline environments as a new osmotic compound.
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Affiliation(s)
- Di Lu
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Co-funded by Xinjiang Production & Construction Corps and The Ministry of Science & Technology, Tarim University, Alar, China
- College of Life Sciences and Technology, Tarim University, Alar, China
| | - Hong-ling Shen
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Co-funded by Xinjiang Production & Construction Corps and The Ministry of Science & Technology, Tarim University, Alar, China
- College of Life Sciences and Technology, Tarim University, Alar, China
| | - Lei Wang
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Co-funded by Xinjiang Production & Construction Corps and The Ministry of Science & Technology, Tarim University, Alar, China
- College of Life Sciences and Technology, Tarim University, Alar, China
| | - Chuan-xing Wan
- Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Co-funded by Xinjiang Production & Construction Corps and The Ministry of Science & Technology, Tarim University, Alar, China
- College of Life Sciences and Technology, Tarim University, Alar, China
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Shan S, Wei Z, Cheng W, Du D, Zheng D, Ma G. Biofertilizer based on halotolerant microorganisms promotes the growth of rice plants and alleviates the effects of saline stress. Front Microbiol 2023; 14:1165631. [PMID: 37362923 PMCID: PMC10288287 DOI: 10.3389/fmicb.2023.1165631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/10/2023] [Indexed: 06/28/2023] Open
Abstract
Long-term soil salinization easily contributes to soil hardness, soil nutrient imbalance, and soil microbial diversity reduction, resulting in low rice yields in the salinized fields, and microbial remediation is one of the important measures to improve salinized soil. To verify the effect of biofertilizer based on halotolerant microorganisms on promoting rice growth and alleviating saline stress, this study discussed the effects of biofertilizer on soil microbial diversity and community structure and analyzed the correlation between the formation of microbial community structure and soil nutrient factors in the salinized field. The result, in comparison with applying inorganic fertilizer (referred to as CK), showed that notably increased soil available nitrogen, available phosphorus, available potassium, and rice paddy yield (p < 0.05) and significantly decreased soil electrical conductivity (p < 0.05) were achieved via biofertilizer (referred to as G2). Additionally, the application of biofertilizer contributes to the increase in soil microbial diversity and reorganization of microbial community structure, and through the analysis of linear discriminant analysis effect size, a notable difference in relative abundance was found in 13 genera, 6 families, and 3 orders between the control group and experimental groups (p < 0.05), and by linear discriminant analysis, Desulfomonas was further identified as the differentiated indicator. The redundancy analysis showed that available phosphorus and cation exchange capacity were the key environmental factors that affected microbial community structure and composition. Through bacterial functional prediction, increased rhizosphere soil bacterial metabolism, enzyme activity, membrane transport, and other potential functions were achieved by applying biofertilizer. Therefore, the application of biofertilizer could significantly alleviate rice growth stress and increase nutrient supply capacity in saline soil. These findings provide theoretical support for soil microbial improvement technology in the salinized field.
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Affiliation(s)
- Shiping Shan
- Hunan Institute of Microbiology, Changsha, Hunan, China
| | - Zhongwei Wei
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, Hunan, China
| | - Wei Cheng
- Hunan Institute of Microbiology, Changsha, Hunan, China
| | - Dongxia Du
- Hunan Institute of Microbiology, Changsha, Hunan, China
| | | | - Guohui Ma
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, Hunan, China
- Guangdong Ocean University, Zhanjiang, Guangdong, China
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Xu M, Chen Q, Kong X, Han L, Zhang Q, Li Q, Hao B, Zhao X, Liu L, Wan H, Nie J. Heavy metal contamination and risk assessment in winter jujube (Ziziphus jujuba Mill. cv. Dongzao). Food Chem Toxicol 2023; 174:113645. [PMID: 36736610 DOI: 10.1016/j.fct.2023.113645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023]
Abstract
Winter jujube (Ziziphus jujuba Mill. cv. Dongzao) is a major fresh-eating jujube fruit with various important nutrients for humans. It can absorb heavy metals from polluted air, water and soils and applied pesticides, which may pose potential threats to consumers. Here, to evaluate the content of heavy metals in winter jujube and systematically evaluate the potential risks, we collected 212 winter jujube samples from four main producing areas in China and determined the contents of eight heavy metals (Cd, Cr, Pb, Ni, Cu, Zn, As, and Mn) using inductively coupled plasma mass spectrometer (ICP-MS). Based on the integrated pollution index (IPI) evaluation standard, more than 99.06% of samples were at safe levels. Moreover, clustering analysis divided the eight heavy metals into four groups, namely Cr/Ni, Cd/Pb, Cu/Mn/Zn, and As. Importantly, none of the analyzed heavy metals posed risks to adults as indicted by the average carcinogenic and non-carcinogenic risks. Notably, Cr and Cd could pose low carcinogenic risks to children (≤12 age group) when their concentration reached the 90th percentile. This study systematically assessed the health risks associated with heavy metal intake through winter jujube consumption and highlighted the necessity of constant heavy metal monitoring in winter jujube.
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Affiliation(s)
- Min Xu
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
| | - Qiusheng Chen
- Institute of Agricultural Product Quality, Safety and Nutrition, Tianjin Academy of Agricultural Sciences, Tianjin, 300381, China.
| | - Xiabing Kong
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
| | - Lingxi Han
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
| | - Qiang Zhang
- Institute of Agricultural Product Quality, Safety and Nutrition, Tianjin Academy of Agricultural Sciences, Tianjin, 300381, China.
| | - Qingjun Li
- Management Service Center of Shandong Binzhou National Agricultural Science and Technology Park, Binzhou, 256600, China.
| | - Bianqing Hao
- Shanxi Center for Testing of Functional Agro-Products, Shanxi Agricultural University, Taiyuan, 030031, China.
| | - Xubo Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Lu Liu
- Institute of Agricultural Product Quality, Safety and Nutrition, Tianjin Academy of Agricultural Sciences, Tianjin, 300381, China.
| | - Haoliang Wan
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
| | - Jiyun Nie
- College of Horticulture, Qingdao Agricultural University/Laboratory of Quality & Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products (Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety Engineering, Qingdao, 266109, China.
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