1
|
Wang Z, Yin J, Bai M, Yang J, Jiang C, Yi X, Liu Y, Gao C. New Polyene Macrolide Compounds from Mangrove-Derived Strain Streptomyces hiroshimensis GXIMD 06359: Isolation, Antifungal Activity, and Mechanism against Talaromyces marneffei. Mar Drugs 2024; 22:38. [PMID: 38248663 PMCID: PMC10819995 DOI: 10.3390/md22010038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/05/2024] [Accepted: 01/06/2024] [Indexed: 01/23/2024] Open
Abstract
Mangrove-derived actinomycetes represent a rich source of novel bioactive natural products in drug discovery. In this study, four new polyene macrolide antibiotics antifungalmycin B-E (1-4), along with seven known analogs (5-11), were isolated from the fermentation broth of the mangrove strain Streptomyces hiroshimensis GXIMD 06359. All compounds from this strain were purified using semi-preparative HPLC and Sephadex LH-20 gel filtration while following an antifungal activity-guided fractionation. Their structures were elucidated through spectroscopic techniques including UV, HR-ESI-MS, and NMR. These compounds exhibited broad-spectrum antifungal activity against Talaromyces marneffei with minimum inhibitory concentration (MIC) values being in the range of 2-128 μg/mL except compound 2. This is the first report of polyene derivatives produced by S. hiroshimensis as bioactive compounds against T. marneffei. In vitro studies showed that compound 1 exerted a significantly stronger antifungal activity against T. marneffei than other new compounds, and the antifungal mechanism of compound 1 may be related to the disrupted cell membrane, which causes mitochondrial dysfunction, resulting in leakage of intracellular biological components, and subsequently, cell death. Taken together, this study provides a basis for compound 1 preventing and controlling talaromycosis.
Collapse
Affiliation(s)
- Zhou Wang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Jianglin Yin
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
- Guangxi Scientific Research Center of Traditional Chinese Medicine, Nanning 530200, China
| | - Meng Bai
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Jie Yang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Cuiping Jiang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Xiangxi Yi
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Yonghong Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| | - Chenghai Gao
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Z.W.); (J.Y.); (M.B.); (J.Y.); (C.J.)
- Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China;
| |
Collapse
|
2
|
Li J, Liu X, Yao Q, Xu L, Li W, Tan W, Wang Q, Xing W, Liu D. Tolerance and adaptation characteristics of sugar beet ( Beta vulgaris L.) to low nitrogen supply. PLANT SIGNALING & BEHAVIOR 2023; 18:2159155. [PMID: 36567601 PMCID: PMC9794014 DOI: 10.1080/15592324.2022.2159155] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/01/2022] [Accepted: 12/03/2022] [Indexed: 05/24/2023]
Abstract
Nitrogen (N) is an essential element required for sugar beet growth. Sugar beets with low N (LN) tolerance and high N use efficiency are excellent materials for breeding. Here, we comprehensively evaluated the morphological and physiological responses of nine sugar beet genotypes to LN supply. It was found that 0.5 mmol·L-1 N (LN) significantly influenced the performance of leaves and the topology of roots by reducing the bioproduction of chlorophyll a (Chl a) and soluble protein (SP) and the accumulation of N in leaves and roots (LNA and RNA), thus differentially restricting the growth (hypocotyl diameter, HD; root length, RL) and biomass (leaf and root fresh weight; LFW and RFW; leaf dry weight, LDW) of these sugar beets. Principal component and cluster analyses showed that 780016B/12 superior (F) exhibited excellent tolerance to LN; it had higher SOD activity (62.70%) and APX activity (188.92%) and a higher proline content (131.82%) than 92011 (G, LN sensitive). These attributes helped 780016B/12 superior (F) to better endure LN stress, and the morphology and N distribution changed to adapt to N deficiency, such that the root length increased by 112.48%, leaf area increased by 101.23%, and leaf nitrogen accumulation reached a peak of 14.13 g/plant. It seems that LN-tolerant genotypes increased their root length and surface area by reducing the difference in biomass, thereby expanding the contact between roots and soil, which was conducive to the absorption of nutrients (N) by sugar beets and helped distribute more assimilation products to the roots.
Collapse
Affiliation(s)
- Jiajia Li
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Xinyu Liu
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Molecular Biology, School of Life Sciences, Heilongjiang University, Harbin150080, P. R. China
| | - Qi Yao
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Molecular Biology, School of Life Sciences, Heilongjiang University, Harbin150080, P. R. China
| | - Lingqing Xu
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Wangsheng Li
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Wenbo Tan
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Qiuhong Wang
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Wang Xing
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| | - Dali Liu
- National Beet Medium-Term Gene Bank, Heilongjiang University, Harbin150080, P. R. China
- Key Laboratory of Sugar Beet Genetics and Breeding, Heilongjiang Province Common College/College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin150080, P. R. China
| |
Collapse
|
3
|
Polyenic Antibiotics and Other Antifungal Compounds Produced by Hemolytic Streptomyces Species. Int J Mol Sci 2022; 23:ijms232315045. [PMID: 36499372 PMCID: PMC9740855 DOI: 10.3390/ijms232315045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/14/2022] [Accepted: 11/26/2022] [Indexed: 12/05/2022] Open
Abstract
Streptomyces are of great interest in the pharmaceutical industry as they produce a plethora of secondary metabolites that act as antibacterial and antifungal agents. They may thrive on their own in the soil, or associate with other organisms, such as plants or invertebrates. Some soil-derived strains exhibit hemolytic properties when cultivated on blood agar, raising the question of whether hemolysis could be a virulence factor of the bacteria. In this work we examined hemolytic compound production in 23 β-hemolytic Streptomyces isolates; of these 12 were soil-derived, 10 were arthropod-associated, and 1 was plant-associated. An additional human-associated S. sp. TR1341 served as a control. Mass spectrometry analysis suggested synthesis of polyene molecules responsible for the hemolysis: candicidins, filipins, strevertene A, tetrafungin, and tetrin A, as well as four novel polyene compounds (denoted here as polyene A, B, C, and D) in individual liquid cultures or paired co-cultures. The non-polyene antifungal compounds actiphenol and surugamide A were also identified. The findings indicate that the ability of Streptomyces to produce cytolytic compounds (here manifested by hemolysis on blood agar) is an intrinsic feature of the bacteria in the soil environment and could even serve as a virulence factor when colonizing available host organisms. Additionally, a literature review of polyenes and non-polyene hemolytic metabolites produced by Streptomyces is presented.
Collapse
|
4
|
Zhang QQ, Shi J, Shen PY, Xi F, Qian CY, Zhang GH, Zhu HJ, Xiao HM. Exploring the Efficacy of Biocontrol Microbes against the Fungal Pathogen Botryosphaeria dothidea JNHT01 Isolated from Fresh Walnut Fruit. Foods 2022; 11:foods11223651. [PMID: 36429242 PMCID: PMC9689359 DOI: 10.3390/foods11223651] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/03/2022] [Accepted: 11/11/2022] [Indexed: 11/18/2022] Open
Abstract
Biological control by antagonistic microorganisms are an effective and environmentally friendly approach in postharvest disease management. In order to develop a biocontrol agent for fresh walnut fruit preservation, the potential biocontrol effects of Bacillus amyloliquefaciens RD.006 and Hanseniaspora uvarum FA.006 against the main fungal pathogen of walnuts were evaluated. Botryosphaeria species showed the highest detection, and the JNHT01 strain showed the strongest pathogenicity. Bot. dothidea JNHT01 caused gray mold and brown rot on fresh walnuts, and its incidence rate reached 100% after an 8 days incubation. The growth of this fungal strain can be promoted by lighting, with a maximum growth rate achieved at a pH of 7 and at 28 °C. B. amyloliquefaciens RD.006 and H. uvarum FA.006 supernatants at a concentration of 1-15% v/v showed antifungal activity. The mycelial growth inhibition rates of Bot. dothidea JNHT01 were 23.67-82.61% for B. amyloliquefaciens RD.006 and 1.45-21.74% for H. uvarum FA.006. During Bot. dothidea JNHT01 growth, the biomass, nucleic acid leakage, and malondialdehyde content gradually increased, while the DPPH scavenging capacity and SOD activity decreased. The B. amyloliquefaciens RD.006 and H. uvarum FA.006 strains showed antifungal activity by damaging fungal cell membranes and reducing fungal antioxidant activity. Moreover, the antifungal effect of B. amyloliquefaciens RD.006 was higher than that of H. uvarum FA.006. Hence, the RD.006 strain of B. amyloliquefaciens can be considered a potential biocontrol agent for the management of postharvest walnut diseases caused by Bot. dothidea.
Collapse
Affiliation(s)
- Qiu Qin Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
| | - Jie Shi
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
| | - Pei Yao Shen
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
| | - Fei Xi
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
| | - Cheng Yu Qian
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
| | - Guo Hua Zhang
- Shandong Wukangxuan Modern Agriculture and Forestry Development Co., Ltd., Zoucheng 273519, China
| | - Hai Jun Zhu
- Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Hong Mei Xiao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China (H.M.X.)
- Correspondence: ; Tel./Fax: +86-02584395618
| |
Collapse
|
5
|
Lee H, Hwang JS, Lee DG. dinF Elicits Nitric Oxide Signaling Induced by Periplanetasin-4 from American Cockroach in Escherichia coli. Curr Microbiol 2021; 78:3550-3561. [PMID: 34313814 DOI: 10.1007/s00284-021-02615-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 07/16/2021] [Indexed: 01/07/2023]
Abstract
Modern antibiotics have been developed with the aim of destroying cellular function; however, the risk of antibiotic-resistance is increasing continuously. As a result, antimicrobial peptide (AMP) is considered a novel strategy to substitute traditional drugs. This study focused on revealing the antibacterial mechanism(s) of periplanetasn-4, an AMP identified from Cockroach. To elucidate whether periplanetasin-4 generates reactive oxygen species (ROS), a crucial stress factor for cell death, intracellular ROS was measured in Escherichia coli. The degree of membrane and DNA damage was determined using the properties that ROS causes oxidative stress to cell components. Unlike normal cell death, membrane depolarization was observed but DNA fragmentation did not occur. In addition, accumulation of nitric oxide (NO), a free radical with high toxicity, was measured and the byproduct of NO also induced severe intracellular damage. Periplanetasin-4-induced NO also impacted on cytosol calcium levels and triggered lipid peroxidation and DNA oxidation. These features were weakened when NO synthesis was interrupted, and this data suggested that perplanetasin-4-induced NO participates in E. coli cell damage. Moreover, this AMP-induced NO stimulates expression of SOS repair proteins and activation of RecA, a bacterial caspase-like protein. Features of nitrosative damage did not occur especially without dinF gene which is associated with oxidative stress. Therefore, it was indicated that when there is a NO signal, dinF promotes cell death. In conclusion, the combined investigations demonstrated that the antibacterial mechanism(s) of periplanetasin-4 was a NO-induced cell death, and dinF gene is closely related to cell death pathway.
Collapse
Affiliation(s)
- Heejeong Lee
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, 41566, Korea
| | - Jae Sam Hwang
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Wanju, Republic of Korea
| | - Dong Gun Lee
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, 41566, Korea.
| |
Collapse
|
6
|
Microorganisms Photocatalytic Inactivation on Ag3PO4 Sub-Microcrystals Under WLEDs Light Source. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-01930-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
7
|
Yang CJ, Huang TP, Huang JW. Field Sanitation and Foliar Application of Streptomyces padanus PMS-702 for the Control of Rice Sheath Blight. THE PLANT PATHOLOGY JOURNAL 2021; 37:57-71. [PMID: 33551697 PMCID: PMC7847755 DOI: 10.5423/ppj.oa.12.2020.0227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/06/2021] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Rice sheath blight (ShB), caused by Rhizoctonia solani Kühn AG1-IA, is one of the destructive rice diseases worldwide. The aims of this study were to develop biocontrol strategies focusing on field sanitation and foliar application with a biocontrol agent for ShB management. Streptomyces padanus PMS-702 showed a great antagonistic activity against R. solani. Fungichromin produced by S. padanus PMS-702, at 3.07 mg/l inhibited 50% mycelial growth, caused leakage of cytoplasm, and inhibited the formation of infection structures of R. solani. Fungichromin could reach to 802 mg/l when S. padanus PMS-702 was cultured in MACC broth for 6 days. Addition of 0.5% S. padanus PMS-702 broth into soil decreased the survival rate of the pathogen compared to the control. Soil amended with 0.5% S. padanus broth and 0.5% tea seed pomace resulted in the death of R. solani mycelia in the infested rice straws, and the germination of sclerotia was inhibited 21 days after treatment. Greenhouse trials revealed that S. padanus cultured in soybean meal-glucose (SMGC-2) medium after mixing with different surfactants could enhance its efficacy for inhibiting the pathogen. Of six surfactants tested, the addition of 2% tea saponin was the most effective in suppressing the pathogen. S. padanus broth after being fermented in SMGC-2, mixed with 2% tea saponin, diluted 100 fold, and sprayed onto rice plants significantly reduced ShB disease severity. Thus, S. padanus PMS-702 is an effective biocontrol agent. The efficacy of S. padanus PMS-702 for disease control could be improved through formulation.
Collapse
Affiliation(s)
- Chia-Jung Yang
- Department of Plant Pathology, National Chung Hsing University, Taichung 40227, Taiwan
| | - Tzu-Pi Huang
- Department of Plant Pathology, National Chung Hsing University, Taichung 40227, Taiwan
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 407, Taiwan
| | - Jenn-Wen Huang
- Department of Plant Pathology, National Chung Hsing University, Taichung 40227, Taiwan
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 407, Taiwan
| |
Collapse
|
8
|
Huang D, Wang S, Song D, Cao X, Huang W, Ke S. Discovery of γ-Lactam Alkaloid Derivatives as Potential Fungicidal Agents Targeting Steroid Biosynthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14438-14451. [PMID: 33225708 DOI: 10.1021/acs.jafc.0c05823] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Biological control of plant pathogens is considered as one of the green and effective technologies using beneficial microorganisms or microbial secondary metabolites against plant diseases, and so microbial natural products have played important roles in the research and development of new and green agrochemicals. To explore the potential applications for natural γ-lactam alkaloids and their derivatives, 26 γ-lactams that have flexible substituent patterns were synthesized and characterized, and their in vitro antifungal activities against eight kinds of plant pathogens belonging to oomycetes, basidiomycetes, and deuteromycetes were fully evaluated. In addition, the high potential compounds were further tested using an in vivo assay against Phytophthora blight of pepper to verify a practical application for controlling oomycete diseases. The potential modes of action for compound D1 against Phytophthora capsici were also investigated using microscopic technology (optical microscopy, scanning electron microscopy, and transmission electron microscopy) and label-free quantitative proteomics analysis. The results demonstrated that compound D1 may be a potential novel fungicidal agent against oomycete diseases (EC50 = 4.9748 μg·mL-1 for P. capsici and EC50 = 5.1602 μg·mL-1 for Pythium aphanidermatum) that can act on steroid biosynthesis, which can provide a certain theoretical basis for the development of natural lactam derivatives as potential antifungal agents.
Collapse
Affiliation(s)
- Daye Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
| | - Shuangshuang Wang
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Di Song
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiufang Cao
- Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenbo Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
| | - Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Science, Wuhan 430064, China
| |
Collapse
|
9
|
Ke S, Fang W, Huang W, Zhang Z, Shi L, Wan Z, Wang K, Cao C, Huang D. Sulfur-containing natural hinduchelins derivatives as potential antifungal agents against Rhizoctonia solani. Bioorg Med Chem Lett 2020; 30:127245. [PMID: 32389528 DOI: 10.1016/j.bmcl.2020.127245] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/28/2020] [Accepted: 05/02/2020] [Indexed: 01/06/2023]
Abstract
Aryl-oxazole alkaloids are an important class of heterocyclic natural products, and which has been demonstrated to exhibit broad biological functions. During the course of our research for highly active compounds from natural products, the natural hinduchelins A-D with typical aryl-oxazole unit have been synthesized and investigated. So, in order to develop highly potential functional molecules, a series of novel sulfur-containing aryl-oxazole compounds derived from natural hinduchelins was designed and synthesized, and their in vitro fungicidal activities against four common plant pathogenic fungi (oomycetes Phytophthora capsici, ascomycetes Sclerotinia sclerotiorum, deuteromycetes Botrytis cinerea and basidiomycetes Rhizoctonia solani) were evaluated, the results demonstrated that compounds 7b and 7c displayed good selectivity and specificity in vitro against basidiomycetes R. solani. In addition, the in vivo antifungal activities also indicated compounds 7b and 7c can protect the horsebean against infection by R. solani, and the possible mechanism of antifungal action for these compounds has also been investigated.
Collapse
Affiliation(s)
- Shaoyong Ke
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China.
| | - Wei Fang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Wenbo Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Zhigang Zhang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Liqiao Shi
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Zhongyi Wan
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Kaimei Wang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Chunxia Cao
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China
| | - Daye Huang
- National Biopesticide Engineering Research Centre, Hubei Biopesticide Engineering Research Centre, Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China.
| |
Collapse
|
10
|
Antifungal Action of Antifungalmycin N2 Against Rhizoctonia solani by Disrupting Cell Membrane and Inhibiting Succinate Dehydrogenase. Curr Microbiol 2019; 77:254-260. [PMID: 31828379 DOI: 10.1007/s00284-019-01837-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/02/2019] [Indexed: 10/25/2022]
Abstract
Antifungalmycin N2 (3-methyl-3,5-amino-4-vinyl-2-pyrone, C6H7O2N) was a novel structural antifungal metabolite produced by Streptomyces sp. strain N2. Our previous study reported that the antagonistic interaction between antifungalmycin N2 and Rhizoctonia solani was accompanied by an oxidative stress in R. solani cell, indicating a probable damage occurred in the cell membranes and mitochondria. To verify this, the present study focused on investigating the effects of antifungalmycin N2 on the structure and function of cell membranes and mitochondria of R. solani. Morphological observations in transmission electron microscopy and fluorescence microscope showed that cell membranes of R. solani were damaged, and its cytoplasmic organelles were disorganized when treated with antifungalmycin N2. Meanwhile, the kinetics of membrane-related physiological and biochemical parameters, such as the increased malondialdehyde level, dropped ergosterol formation, and enhanced electrical conductivity in R. solani mycelia, further confirmed that antifungalmycin N2 would disrupt the cell membrane structure and function. More significantly, antifungalmycin N2 had a significantly inhibitory effect on the succinate dehydrogenase (SDH) activity of R. solani, and indicated that the mode and site of action of antifungalmycin N2 against R. solani might be similar to the existing succinate dehydrogenase inhibitors fungicides by binding in the ubiquinone-binding site. In conclusion, the above results demonstrated that the mode and site of action of antifungalmycin N2 targeted to cell membrane and SDH of R. solani, thus exerting the antifungal activity by damaging cell membrane structure and function, together with inhibiting the SDH activity.
Collapse
|
11
|
Antagonistic activity and mechanism of an isolated Streptomyces corchorusii stain AUH-1 against phytopathogenic fungi. World J Microbiol Biotechnol 2019; 35:145. [DOI: 10.1007/s11274-019-2720-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 08/29/2019] [Indexed: 12/15/2022]
|
12
|
Lee H, Woo ER, Lee DG. Apigenin induces cell shrinkage in Candida albicans by membrane perturbation. FEMS Yeast Res 2018; 18:4810751. [DOI: 10.1093/femsyr/foy003] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 01/15/2018] [Indexed: 01/05/2023] Open
|
13
|
Milisavljevic M, Zivkovic S, Pekmezovic M, Stankovic N, Vojnovic S, Vasiljevic B, Senerovic L. Control of human and plant fungal pathogens using pentaene macrolide 32, 33-didehydroroflamycoin. J Appl Microbiol 2015; 118:1426-34. [PMID: 25810243 DOI: 10.1111/jam.12811] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 03/04/2015] [Accepted: 03/12/2015] [Indexed: 11/29/2022]
Abstract
AIMS The aim of this study was to address the toxicity of recently described polyene macrolide 32, 33-didehydroroflamycoin (DDHR) on a wide range of fungal pathogens and its potential to control plant fungal diseases. METHODS AND RESULTS The antifungal activity of DDHR in vitro was examined against common human and plant pathogenic fungi using a broth microdilution assay and a disk diffusion assay. Minimum inhibitory concentrations ranged from 12·5 to 35 μg ml(-1) . A radial growth inhibition assay showed that DDHR inhibited mycelia growth, inducing mycelial necrosis and affecting sporulation. During the in vivo assay on apple fruits administration of DDHR 1 h before fungal inoculation inhibited spreading of the infection. Importantly, DDHR exhibited no phytotoxic effects on the model plant, Capsicum annum, verified by the plant growth rate and chlorophyll content. CONCLUSIONS DDHR inhibits growth of various plant pathogens in vitro with the strongest activity against Alternaria alternata, Colletotrichum acutatum and Penicillium expansum, and protects apple fruits from decay. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report of the inhibitory effect of DDHR on important pathogenic fungal isolates. DDHR could be a good scaffold for developing new antifungal agents for fruit and vegetable protection.
Collapse
Affiliation(s)
- M Milisavljevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - S Zivkovic
- Institute for Plant Protection and the Environment, Belgrade, Serbia
| | - M Pekmezovic
- National Reference Medical Mycology Laboratory, Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - N Stankovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - S Vojnovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - B Vasiljevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - L Senerovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
14
|
Antifungal activity of Streptomyces albidoflavus L131 against the leaf mold pathogen Passalora fulva involves membrane leakage and oxidative damage. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s13765-015-0012-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|