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Lin F, Mao Y, Zhao F, Idris AL, Liu Q, Zou S, Guan X, Huang T. Towards Sustainable Green Adjuvants for Microbial Pesticides: Recent Progress, Upcoming Challenges, and Future Perspectives. Microorganisms 2023; 11:microorganisms11020364. [PMID: 36838328 PMCID: PMC9965284 DOI: 10.3390/microorganisms11020364] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/28/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023] Open
Abstract
Microbial pesticides can be significantly improved by adjuvants. At present, microbial pesticide formulations are mainly wettable powders and suspension concentrations, which are usually produced with adjuvants such as surfactants, carriers, protective agents, and nutritional adjuvants. Surfactants can improve the tension between liquid pesticides and crop surfaces, resulting in stronger permeability and wettability of the formulations. Carriers are inert components of loaded or diluted pesticides, which can control the release of active components at appropriate times. Protective agents are able to help microorganisms to resist in adverse environments. Nutritional adjuvants are used to provide nutrients for microorganisms in microbial pesticides. Most of the adjuvants used in microbial pesticides still refer to those of chemical pesticides. However, some adjuvants may have harmful effects on non-target organisms and ecological environments. Herein, in order to promote research and improvement of microbial pesticides, the types of microbial pesticide formulations were briefly reviewed, and research progress of adjuvants and their applications in microbial pesticides were highlighted, the challenges and the future perspectives towards sustainable green adjuvants of microbial pesticides were also discussed in this review.
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Zeng LJ, Huang YH, Lü H, Geng J, Zhao HM, Xiang L, Li H, Li YW, Mo CH, Cai QY, Li QX. Uptake pathways of phthalates (PAEs) into Chinese flowering cabbage grown in plastic greenhouses and lowering PAE accumulation by spraying PAE-degrading bacterial strain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152854. [PMID: 34995579 DOI: 10.1016/j.scitotenv.2021.152854] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/09/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Uptake pathway and accumulation variation of soil and airborne phthalates (PAEs) in plastic greenhouses by vegetables remains unclear. Here, pot experiments of Chinese flowering cabbage were designed to distinguish root or leaf uptake pathways of PAEs, and investigate the mitigation of spraying PAE-degrading strain in PAE accumulation by vegetables. The results showed that leaves of Chinese flowering cabbage grown in plastic greenhouses absorbed more PAEs from air than those of outside greenhouses. Airborne PAEs were mainly stored in leaf surfaces of vegetables grown inside greenhouse, while PAEs absorbed by roots from soil were translocated and mainly stored in mesophyll, especially in cell walls and organelles. PAE concentrations in mesophyll elevated with increasing soil PAE levels, whereas those in leaf surfaces were not influenced by soil PAE levels. The values of bioconcentration factors for leaves inside greenhouses were significantly (1.39-3.47 fold) higher than those outside. PAE-degrading strain (Rhodococcus pyridinivorans XB) sprayed on leaf surfaces could grow well and Rhodococcus was the dominant genus as confirmed by Illumina high-throughput sequencing. PAE-degrading strain effectively reduced PAEs by 12.9%-34.9% in leaf surface, but not those in vegetables grown in high-PAE soil. This study demonstrated mitigation of spraying PAE-degrading strain in PAE accumulation by vegetable leaves from air of plastic greenhouse.
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Affiliation(s)
- Li-Juan Zeng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yu-Hong Huang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Huixiong Lü
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Jun Geng
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hai-Ming Zhao
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Lei Xiang
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Hui Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Yan-Wen Li
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Quan-Ying Cai
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI 96822, USA
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Zeng Y, Liu H, Zhu T, Han S, Li S. Preparation of Nanomaterial Wettable Powder Formulations of Antagonistic Bacteria from Phellodendron chinense and the Biological Control of Brown Leaf Spot Disease. THE PLANT PATHOLOGY JOURNAL 2021; 37:215-231. [PMID: 34111912 PMCID: PMC8200580 DOI: 10.5423/ppj.oa.02.2021.0020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/15/2021] [Accepted: 03/22/2021] [Indexed: 06/02/2023]
Abstract
Brown leaf spot disease caused by Nigrospora guilinensis on Phellodendron chinense occurs in a large area in Dayi County, Chengdu City, Sichuan Province, China each year. This outbreak has severely reduced the production of Chinese medicinal plants P. chinense and caused substantial economic losses. The bacterial isolate JKB05 was isolated from the healthy leaves of P. chinense, exhibited antagonistic effects against N. guilinensis and was identified as Bacillus megaterium. The following fermentation medium and conditions improved the inhibitory effect of B. megaterium JKB05 on N. guilinensis: 2% glucose, 0.1% soybean powder, 0.1% KCl, and 0.05% MgSO4; initial concentration 6 × 106 cfu/ml, and a 42-h optimal fermentation time. A composite of 0.1% nano-SiO2 JKB05 improved the thermal stability, acid-base stability and ultraviolet resistance by 16%, 12%, and 38.9%, respectively, and nano-SiO2 was added to the fermentation process. The best formula for the wettable powder was 35% kaolin, 4% polyethylene glycol, 8% Tween, and 2% humic acid. The following quality test results for the wettable powder were obtained: wetting time 87.0 s, suspension rate 80.33%, frequency of microbial contamination 0.08%, pH 7.2, fineness 95.8%, drying loss 1.47%, and storage stability ≥83.5%. A pot experiment revealed that the ability of JKB05 to prevent fungal infections on P. chinense increased considerably and achieved levels of control as high as 94%. The use of nanomaterials significantly improved the ability of biocontrol bacteria to control this disease.
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Affiliation(s)
- Yanling Zeng
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Han Liu
- Ganzi Institute of Forestry Research, Kangding 626001, China
| | - Tianhui Zhu
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Shan Han
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
| | - Shujiang Li
- College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
- Key Laboratory of National Forestry & Grassland Administration on Forest Resources Conservation and Ecological Safety in the Upper Reaches of the Yangtze River, College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
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Huang YH, Huang XJ, Chen XH, Cai QY, Chen S, Mo CH, Lü H, Wong MH. Biodegradation of di-butyl phthalate (DBP) by a novel endophytic bacterium Bacillus subtilis and its bioaugmentation for removing DBP from vegetation slurry. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 224:1-9. [PMID: 30025259 DOI: 10.1016/j.jenvman.2018.07.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/21/2018] [Accepted: 07/07/2018] [Indexed: 05/26/2023]
Abstract
Di-butyl phthalate (DBP) is a widely used plasticizer, recalcitrant and hazardous organic compound with high detection frequencies and concentrations in water and soil that pose a great threat to human health. A novel endphytic bacterium strain N-1 capable of efficiently degrading DBP and utilizing it as sole carbon source was isolated from Ageratum conyzoides. This bacterium was identified as Bacillus subtilis based on its morphological characteristics and 16S rDNA sequence analysis. Under the optimal culture conditions (pH 7.0, 30 °C), degradation percentage of DBP (12.5-100 mg/L) was up to 95% within five days, and its biodegradation half-life was less than 7.23 h. Degradation percentage of high DBP concentration (200 mg/L) was relatively lower (89%) with half-life of 56.8 h. DBP was degraded by Bacillus subtilis N-1 into mono-butyl phthalate and phthalic acid as evidenced by GC-MS analysis. Bioaugmentation of Youngia japonica plant slurry with strain N-1 greatly accelerated DBP dissipation with 97.5% removal percentage (higher by 47% than non-inoculation). The results highlighted that strain N-1 has great potential for bioremediation by plant-endophyte partnerships and for lowering PAE accumulation in crops.
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Affiliation(s)
- Yu-Hong Huang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Xue-Jing Huang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Xiao-Hong Chen
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Quan-Ying Cai
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Shaohua Chen
- Integrate Microbiology Research Center, South China Agriculture University, Guangzhou, 510642, China
| | - Ce-Hui Mo
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Huixiong Lü
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Integrate Microbiology Research Center, South China Agriculture University, Guangzhou, 510642, China.
| | - Ming-Hung Wong
- Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China; Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
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Liu J, Zhang X, Yang M, Hu M, Zhong G. Toxicity assessment of chlorpyrifos-degrading fungal bio-composites and their environmental risks. Sci Rep 2018; 8:2152. [PMID: 29391422 PMCID: PMC5794795 DOI: 10.1038/s41598-018-20265-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 01/16/2018] [Indexed: 11/09/2022] Open
Abstract
Bioremediation techniques coupling with functional microorganisms have emerged as the most promising approaches for in-situ elimination of pesticide residue. However, the environmental safety of bio-products based on microorganisms or engineered enzymes was rarely known. Here, we described the toxicity assessment of two previously fabricated fungal bio-composites which were used for the biodegradation of chlorpyrifos, to clarify their potential risks on the environment and non-target organisms. Firstly, the acute and chronic toxicity of prepared bio-composites were evaluated using mice and rabbits, indicating neither acute nor chronic effect was induced via short-term or continuous exposure. Then, the acute mortality on zebrafish was investigated, which implied the application of fungal bio-composites had no lethal risk on aquatic organisms. Meanwhile, the assessment on soil organic matters suggested that no threat was posed to soil quality. Finally, by monitoring, the germination of cabbage was not affected by the exposure to two bio-products. Therefore, the application of fungal bio-composites for chlorpyrifos elimination cannot induce toxic risk to the environment and non-target organisms, which insured the safety of these engineered bio-products for realistic management of pesticide residue, and provided new insights for further development of bioremediation techniques based on functional microorganisms.
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Affiliation(s)
- Jie Liu
- Key Laboratory of Integrated Pest Management of Crop in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Xiaoying Zhang
- Key Laboratory of Integrated Pest Management of Crop in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Mengran Yang
- Key Laboratory of Integrated Pest Management of Crop in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Meiying Hu
- Key Laboratory of Integrated Pest Management of Crop in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Guohua Zhong
- Key Laboratory of Integrated Pest Management of Crop in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, 510642, P.R. China.
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