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Liu J, Zhang S, Ma H, Huang J, Xiang M, Liu X. Inhibition and biocontrol potential of Ochrobactrum pseudogrignonense NC1 against four Phytophthora species. J GEN APPL MICROBIOL 2024; 69:327-334. [PMID: 37989280 DOI: 10.2323/jgam.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Phytophthora species are highly destructive soilborne oomycetes pathogens that spread through infested soil and water. Ochrobactrum pseudogrignonense NC1 has been shown to inhibit plant parasitic nematodes via volatile organic compounds (VOCs). In this study, we investigated the inhibitory effect of O. pseudogrignonense NC1 against four Phytophthora species on agar plates and in vivo bioassay. We found that NC1 significantly inhibited the mycelial growth and zoospore production of all four species of Phytophthora in a dose-dependent manner. The half maximal inhibitory concentration (IC50) values for inhibition of mycelial growth (or zoospore production) were 26% (14.8%), 18.9% (14.2%), 20.3% (8.3%) and 46.9% (4%) for Phytophthora capsici Leonian, Phytophthora infestans, Phytophthora parasitica var. nicotiana and Phytophthora sojae, respectively. The biocontrol efficiency of NC1 was 46.3% in pepper seedlings against P. capsici, almost 100% in potato tubers against P. infestans, 60% in tomato leave against P. parasitica and 100% in soybean leave against P. sojae, respectively. Our findings suggest that O. pseudogrignonense NC1 has great potential as a biocontrol agent for managing Phytophthora diseases.
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Affiliation(s)
- Jinming Liu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Mcrobiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University
| | - Shiyu Zhang
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Mcrobiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University
| | - Haikun Ma
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Mcrobiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University
| | - Jun Huang
- Shandong Yuanchen Biomedical Technology Group Co., Ltd
| | - Meichun Xiang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences
| | - Xingzhong Liu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Mcrobiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University
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Wang X, Chi Y, Song S. Important soil microbiota's effects on plants and soils: a comprehensive 30-year systematic literature review. Front Microbiol 2024; 15:1347745. [PMID: 38591030 PMCID: PMC10999704 DOI: 10.3389/fmicb.2024.1347745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/11/2024] [Indexed: 04/10/2024] Open
Abstract
Clarifying the relationship between soil microorganisms and the plant-soil system is crucial for encouraging the sustainable development of ecosystems, as soil microorganisms serve a variety of functional roles in the plant-soil system. In this work, the influence mechanisms of significant soil microbial groups on the plant-soil system and their applications in environmental remediation over the previous 30 years were reviewed using a systematic literature review (SLR) methodology. The findings demonstrated that: (1) There has been a general upward trend in the number of publications on significant microorganisms, including bacteria, fungi, and archaea. (2) Bacteria and fungi influence soil development and plant growth through organic matter decomposition, nitrogen, phosphorus, and potassium element dissolution, symbiotic relationships, plant growth hormone production, pathogen inhibition, and plant resistance induction. Archaea aid in the growth of plants by breaking down low-molecular-weight organic matter, participating in element cycles, producing plant growth hormones, and suppressing infections. (3) Microorganism principles are utilized in soil remediation, biofertilizer production, denitrification, and phosphorus removal, effectively reducing environmental pollution, preventing soil pathogen invasion, protecting vegetation health, and promoting plant growth. The three important microbial groups collectively regulate the plant-soil ecosystem and help maintain its relative stability. This work systematically summarizes the principles of important microbial groups influence plant-soil systems, providing a theoretical reference for how to control soil microbes in order to restore damaged ecosystems and enhance ecosystem resilience in the future.
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Affiliation(s)
| | - Yongkuan Chi
- School of Karst Science, State Engineering Technology Institute for Karst Desertification Control, Guizhou Normal University, Guiyang, China
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Zhang J, Huang X, Hou Y, Xia X, Zhu Z, Huang A, Feng S, Li P, Shi L, Dong P. Isolation and Screening of Antagonistic Endophytes against Phytophthora infestans and Preliminary Exploration on Anti-oomycete Mechanism of Bacillus velezensis 6-5. PLANTS (BASEL, SWITZERLAND) 2023; 12:909. [PMID: 36840257 PMCID: PMC9962363 DOI: 10.3390/plants12040909] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Phytophthora infestans, the notorious pathogen of potato late blight, leads to a severe decline in potato yields and even harvest failure. We isolated 201 endophytic isolates from healthy root tissues of potatoes, among which 41 showed strong antagonistic activity against P. infestans. Further, the tolerance to stress and the potential application against potato late blight of these antagonistic isolates were tested. Most of them were extremely tolerant to stresses such as acid-alkali, temperature, UV, salt, and heavy metal stress. However, some antagonistic isolates with excellent stress tolerance might be pathogenic to potatoes. Combining the screening results, a total of 14 endophytes had excellent comprehensive performance in all the tests. In this paper, the endophyte 6-5 was selected among them for the preliminary exploration of the anti-oomycete mechanism. Analysis of the 16S rDNA sequence revealed that 6-5 had a high homology to the corresponding sequence of Bacillus velezensis (99.72%) from the NCBI database. Endophyte 6-5 significantly inhibited the mycelial growth of P. infestans, with an inhibition rate of over 90% in vitro assays, and deformed the hyphal phenotype of P. infestans. In addition, endophyte 6-5 could secrete protease and cellulase, and produce antagonistic substances with high thermal stability, which might be helpful to its antagonistic activity against P. infestans. Furthermore, it was demonstrated that 6-5 had the ability to improve the resistance of potato tubers to late blight. In short, our study described the process of isolating and screening endophytes with antagonistic activity against P. infestans from potato roots, and further explored the potential of biocontrol candidate strain 6-5 in potato late blight control.
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Affiliation(s)
- Jiaomei Zhang
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, Chongqing 400716, China
| | - Xiaoqing Huang
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Yuqin Hou
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Xiangning Xia
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Zhiming Zhu
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Airong Huang
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, Chongqing 400716, China
| | - Shun Feng
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Peihua Li
- College of Agronomy, Xichang University, Xichang 615013, China
| | - Lei Shi
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Pan Dong
- School of Life Sciences, Chongqing University, Chongqing 401331, China
- Chongqing Key Laboratory of Biology and Genetic Breeding for Tuber and Root Crops, Chongqing 400716, China
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Protease Produced by Endophytic Fungi: A Systematic Review. Molecules 2021; 26:molecules26227062. [PMID: 34834154 PMCID: PMC8623497 DOI: 10.3390/molecules26227062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/29/2022] Open
Abstract
The purpose of this systematic review was to identify the available literature of production, purification, and characterization of proteases by endophytic fungi. There are few complete studies that entirely exhibit the production, characterization, and purification of proteases from endophytic fungi. This study followed the PRISMA, and the search was conducted on five databases: PubMed, PMC, Science Direct, Scopus Articles, and Web of Science up until 18 May 2021, with no time or language restrictions. The methodology of the selected studies was evaluated using GRADE. Protease production, optimization, purification, and characterization were the main evaluated outcomes. Of the 5540 initially gathered studies, 15 met the inclusion criteria after a two-step selection process. Only two studies optimized the protease production using statistical design and two reported enzyme purification and characterization. The genus Penicillium and Aspergillus were the most cited among the eleven different genera of endophytic fungi evaluated in the selected articles. Six studies proved the ability of some endophytic fungi to produce fibrinolytic proteases, demonstrating that endophytic fungi can be exploited for the further production of agents used in thrombolytic therapy. However, further characterization and physicochemical studies are required to evaluate the real potential of endophytic fungi as sources of industrial enzymes.
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