1
|
de Freitas STF, Silva FG, Bessa LA, de Souza UJB, Augusto DSS, de Faria GS, Vitorino LC. Low microbial diversity, yeast prevalence, and nematode-trapping fungal presence in fungal colonization and leaf microbiome of Serjania erecta. Sci Rep 2024; 14:15456. [PMID: 38965317 PMCID: PMC11224404 DOI: 10.1038/s41598-024-66161-3] [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] [Received: 02/08/2024] [Accepted: 06/27/2024] [Indexed: 07/06/2024] Open
Abstract
Medicinal plant microbiomes undergo selection due to secondary metabolite presence. Resident endophytic/epiphytic microorganisms directly influence plant's bioactive compound synthesis. Hypothesizing low microbial diversity in Serjania erecta leaves, we assessed leaf colonization by epiphytic and endophytic fungi. Given its traditional medicinal importance, we estimated diversity in the endophytic fungal microbiome. Analyses included scanning electron microscopy (SEM), isolation of cultivable species, and metagenomics. Epiphytic fungi interacted with S. erecta leaf tissues, horizontally transmitted via stomata/trichome bases, expressing traits for nematode trapping. Cultivable endophytic fungi, known for phytopathogenic habits, didn't induce dysbiosis symptoms. This study confirms low leaf microbiome diversity in S. erecta, with a tendency towards more fungal species, likely due to antibacterial secondary metabolite selection. The classification of Halicephalobus sp. sequence corroborated the presence of nematode eggs on the epidermal surface of S. erecta by SEM. In addition, we confirmed the presence of methanogenic archaea and a considerable number of methanotrophs of the genus Methylobacterium. The metagenomic study of endophytic fungi highlighted plant growth-promoting yeasts, mainly Malassezia, Leucosporidium, Meyerozyma, and Hannaella. Studying endophytic fungi and S. erecta microbiomes can elucidate their impact on beneficial bioactive compound production, on the other hand, it is possible that the bioactive compounds produced by this plant can recruit specific microorganisms, impacting the biological system.
Collapse
Affiliation(s)
- Samylla Tássia Ferreira de Freitas
- Laboratory of Agricultural Microbiology, Instituto Federal Goiano - campus Rio Verde, Highway Sul Goiana, Km 01, Rio Verde, GO, 75901-970, Brazil
| | - Fabiano Guimarães Silva
- Laboratory of Plant Mineral Nutrition, Instituto Federal Goiano, campus Rio Verde, Rio Verde, Brazil
| | - Layara Alexandre Bessa
- Laboratory of Plant Mineral Nutrition, Instituto Federal Goiano, campus Rio Verde, Rio Verde, Brazil
| | - Ueric José Borges de Souza
- Bioinformatics and Biotechnology Laboratory, Federal University of Tocantins, Campus of Gurupi, Gurupi, TO, 77410-570, Brazil
| | - Damiana Souza Santos Augusto
- Laboratory of Agricultural Microbiology, Instituto Federal Goiano - campus Rio Verde, Highway Sul Goiana, Km 01, Rio Verde, GO, 75901-970, Brazil
| | - Giselle Santos de Faria
- Laboratory of Agricultural Microbiology, Instituto Federal Goiano - campus Rio Verde, Highway Sul Goiana, Km 01, Rio Verde, GO, 75901-970, Brazil
| | - Luciana Cristina Vitorino
- Laboratory of Agricultural Microbiology, Instituto Federal Goiano - campus Rio Verde, Highway Sul Goiana, Km 01, Rio Verde, GO, 75901-970, Brazil.
| |
Collapse
|
2
|
Damankeshan B, Shamshiri MH, Alaei H. Endophytic fungi are able to induce tolerance to salt stress in date palm seedlings (Phoenix dactylifera L.). Braz J Microbiol 2024; 55:759-775. [PMID: 38157149 PMCID: PMC10920517 DOI: 10.1007/s42770-023-01216-7] [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] [Received: 07/21/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024] Open
Abstract
Date palm, typically considered a salinity-resistant plant, grows in arid and semi-arid regions worldwide, and experiences decreased growth and yields under salt stress. This study investigates the efficacy of endophytic fungi (EF) in enhancing the salinity tolerance of date palm seedlings. In this experiment, EF were isolated from date tree roots and identified morphologically. Following molecular identification, superior strains were selected to inoculate date palm seedlings (Phoenix dactylifera L., cv. Mazafati). The seedlings were subjected to varying levels of salinity stress for 4 months, utilizing a completely randomized factorial design with two factors: fungal strain type (six levels) and salinity stress (0, 100, 200, and 300 mM sodium chloride). The diversity analysis of endophytic fungi in date palm trees revealed that the majority of isolates belonged to the Ascomycota family, with Fusarium and Alternaria being the most frequently isolated genera. In this research, the application of fungal endophytes resulted in increased dry weight of roots, shoots, root length, plant height, and leaf number. Additionally, EF symbiosis with date palm seedling roots led to a reduction in sodium concentration and an increase in potassium and phosphorus concentrations in aerial parts under salt-stress conditions. While salinity elevated lipid peroxidation, consequently increasing malondialdehyde (MDA) levels, EF mitigated damage from reactive oxygen species (ROS) by enhancing antioxidant enzyme activity, including superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX), while promoting proline and total soluble sugar (TSS) accumulation. The colonization percentage generally increased with salinity stress intensity in most strains. According to the results, the application of EF can alleviate the adverse effects of salinity stress and enhance the growth of date palm seedlings under saline conditions.
Collapse
Affiliation(s)
- Bahareh Damankeshan
- Department of Horticultural Science, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
| | - Mohammad Hosein Shamshiri
- Department of Horticultural Science, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
| | - Hosein Alaei
- Department of Plant Pathology, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
| |
Collapse
|
3
|
Peng F, Li X, Wei Z, Luo Y, Wang W, Han G. Structure and Ecological Function of Fungal Endophytes from Stems of Different Mulberry Cultivars. Curr Microbiol 2023; 80:401. [PMID: 37930516 PMCID: PMC10628033 DOI: 10.1007/s00284-023-03504-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 09/25/2023] [Indexed: 11/07/2023]
Abstract
To explore the microbial community structure and ecological function of mulberry and their potential relationship with the resistance of mulberry, the community structure and function of endophytic fungi in 18 mulberry cultivars were analyzed and predicted by using high-throughput sequencing technology and the FUNGuild database. A total of 352 operational taxonomic units of fungi were observed at a 97% similarity level, representing six phyla of fungi, Fungi_unclassified, Ascomycota, Basidiomycota, Zygomycota, Rozellomycota, and Chytridiomycota. Fungi_unclassified was dominant, and Ascomycota was relatively dominant in all cultivars. At the genus level, Ascomycota_unclassified was dominant, and Ampelomyces was relatively dominant, with a richness in TAIWANCHANGGUOSANG 16.47-8975.69 times that in the other cultivars. Classified Ascomycota_unclassified was 4.75-296.65 times more common in NANYUANSIJI than in the other cultivars. Based on the FUNGuild analysis method, we successfully annotated six nutrient types, namely, pathotroph, pathotroph-saprotroph, pathotroph-saprotroph-symbiotroph, saprotroph, saprotroph-symbiotroph, and symbiotroph, among which saprophytic-symbiotic accounted for the largest proportion and was absolutely dominant in TWC. This research suggests that community composition differs among cultivars and that the diversity and richness of endophytic fungi in resistant cultivars are higher than those in susceptible cultivars. The ecological functions of cultivars with different resistances are quite different.
Collapse
Affiliation(s)
- Fangfang Peng
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Xunlan Li
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Zhaoxin Wei
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Youjin Luo
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Wu Wang
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Guohui Han
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China.
| |
Collapse
|
4
|
Zhang R, Yu Z, Cui H, Ye C, Qiao M. Aspergillus niger produces lethal compounds against nematodes. PEST MANAGEMENT SCIENCE 2023; 79:4617-4625. [PMID: 37440680 DOI: 10.1002/ps.7662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/24/2023] [Accepted: 07/13/2023] [Indexed: 07/15/2023]
Abstract
BACKGROUND Aspergillus niger is generally considered safe and is widely used across a broad range of industries from food to pharmaceuticals. The metabolites of some Aspergillus species are effective in killing nematodes. The active ingredients that play a role are citric acid and oxalic acid. RESULTS The effective nematocidal metabolite in the fermentation broth of the A. niger Ym16 is a calcium oxalate coordination compound (C2 H2 O4 •2(C2 HO4 )•C2 O4 •4(H2 O)•2(Ca)). The mortality of fermentation broth and compound solution to second-stage juveniles (J2s) of Meloidogyne incognita were 94% (8 h) and 95% (2 h), respectively. The hatching inhibition rates of fermentation broth and compound solution to eggs of M. incognita were 86% (24 h) and 87% (12 h), respectively. Furthermore, the Ym16 strain promoted plant growth. CONCLUSION Strain Ym16 and its metabolites should be the first choice for nematode control because it is an effective agent against soil nematodes. © 2023 Society of Chemical Industry.
Collapse
Affiliation(s)
- Ruizhe Zhang
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, China
| | - Zefen Yu
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, China
| | - Hexin Cui
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, China
| | - Chuwen Ye
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, China
| | - Min Qiao
- Laboratory for Conservation and Utilization of Bio-Resources, Yunnan University, Kunming, China
| |
Collapse
|
5
|
Monkai J, Hongsanan S, Bhat DJ, Dawoud TM, Lumyong S. Integrative Taxonomy of Novel Diaporthe Species Associated with Medicinal Plants in Thailand. J Fungi (Basel) 2023; 9:603. [PMID: 37367539 DOI: 10.3390/jof9060603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/22/2023] [Accepted: 05/22/2023] [Indexed: 06/28/2023] Open
Abstract
During our investigations of the microfungi on medicinal plants in Thailand, five isolates of Diaporthe were obtained. These isolates were identified and described using a multiproxy approach, viz. morphology, cultural characteristics, host association, the multiloci phylogeny of ITS, tef1-α, tub2, cal, and his3, and DNA comparisons. Five new species, Diaporthe afzeliae, D. bombacis, D. careyae, D. globoostiolata, and D. samaneae, are introduced as saprobes from the plant hosts, viz. Afzelia xylocarpa, Bombax ceiba, Careya sphaerica, a member of Fagaceae, and Samanea saman. Interestingly, this is the first report of Diaporthe species on these plants, except on the Fagaceae member. The morphological comparison, updated molecular phylogeny, and pairwise homoplasy index (PHI) analysis strongly support the establishment of novel species. Our phylogeny also revealed the close relationship between D. zhaoqingensis and D. chiangmaiensis; however, the evidence from the PHI test and DNA comparison indicated that they are distinct species. These findings improve the existing knowledge of taxonomy and host diversity of Diaporthe species as well as highlight the untapped potential of these medicinal plants for searching for new fungi.
Collapse
Affiliation(s)
- Jutamart Monkai
- Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sinang Hongsanan
- Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Darbhe J Bhat
- Department of Botany & Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Vishnugupta Vishwavidyapeetam, Ashoke, Gokarna 581326, India
| | - Turki M Dawoud
- Department of Botany & Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Saisamorn Lumyong
- Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
| |
Collapse
|
6
|
Dos Reis JBA, Pappas Junior GJ, Lorenzi AS, Pinho DB, Costa AM, Bustamante MMDC, Vale HMMD. How Deep Can the Endophytic Mycobiome Go? A Case Study on Six Woody Species from the Brazilian Cerrado. J Fungi (Basel) 2023; 9:jof9050508. [PMID: 37233219 DOI: 10.3390/jof9050508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/27/2023] Open
Abstract
Elucidating the complex relationship between plants and endophytic fungi is very important in order to understand the maintenance of biodiversity, equity, stability, and ecosystem functioning. However, knowledge about the diversity of endophytic fungi from species of the native Brazilian Cerrado biome is poorly documented and remains largely unknown. These gaps led us to characterize the diversity of Cerrado endophytic foliar fungi associated with six woody species (Caryocar brasiliense, Dalbergia miscolobium, Leptolobium dasycarpum, Qualea parviflora, Ouratea hexasperma, and Styrax ferrugineus). Additionally, we investigated the influence of host plant identities on the structure of fungal communities. Culture-dependent methods coupled with DNA metabarcoding were employed. Irrespective of the approach, the phylum Ascomycota and the classes Dothideomycetes and Sordariomycetes were dominant. Using the cultivation-dependent method, 114 isolates were recovered from all the host species and classified into more than 20 genera and 50 species. Over 50 of the isolates belonged to the genus Diaporthe, and were distributed into more than 20 species. Metabarcoding revealed the phyla Chytridiomycota, Glomeromycota, Monoblepharomycota, Mortierellomycota, Olpidiomycota, Rozellomycota, and Zoopagomycota. These groups are reported for the first time as components of the endophytic mycobiome of Cerrado plant species. In total, 400 genera were found in all host species. A unique leaf endophytic mycobiome was identified in each host species, which differed not only by the distribution of fungal species, but also by the abundance of shared species. These findings highlight the importance of the Brazilian Cerrado as a reservoir of microbial species, and emphasize how endophytic fungal communities are diversified and adapted.
Collapse
Affiliation(s)
| | - Georgios Joannis Pappas Junior
- University of Brasília (UnB), Institute of Biological Sciences, Department of Cellular Biology, Brasília 70910-900, DF, Brazil
| | - Adriana Sturion Lorenzi
- University of Brasília (UnB), Institute of Biological Sciences, Department of Cellular Biology, Brasília 70910-900, DF, Brazil
| | - Danilo Batista Pinho
- University of Brasília (UnB), Institute of Biological Sciences, Department of Phytopathology, Brasília 70910-900, DF, Brazil
| | - Alexandra Martins Costa
- University of Brasília (UnB), Institute of Biological Sciences, Department of Ecology, Brasília 70910-900, DF, Brazil
| | | | - Helson Mario Martins do Vale
- University of Brasília (UnB), Institute of Biological Sciences, Department of Phytopathology, Brasília 70910-900, DF, Brazil
| |
Collapse
|
7
|
El-Zawawy NA, Ali SS, Nouh HS. Exploring the potential of Rhizopus oryzae AUMC14899 as a novel endophytic fungus for the production of L-tyrosine and its biomedical applications. Microb Cell Fact 2023; 22:31. [PMID: 36804031 PMCID: PMC9942418 DOI: 10.1186/s12934-023-02041-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 02/12/2023] [Indexed: 02/22/2023] Open
Abstract
BACKGROUND A significant threat to the public's health is the rise in antimicrobial resistance among numerous nosocomial bacterial infections. This may be a detriment to present initiatives to enhance the health of immune-compromised patients. Consequently, attention has been devoted to exploring new bioactive compounds in the field of drug discovery from endophytes. Therefore, this study is the first on the production of L-tyrosine (LT) as a promising bio-therapeutic agent from endophytic fungi. RESULTS A new endophytic fungal isolate has been identified for the first time as Rhizopus oryzae AUMC14899 from Opuntia ficus-indica (L.) and submitted to GenBank under the accession number MZ025968. Separation of amino acids in the crude extract of this fungal isolate was carried out, giving a higher content of LT, which is then characterized and purified. LT exhibited strong antibacterial and anti-biofilm activities against multidrug-resistant Gram-negative and Gram-positive bacteria. The recorded minimum inhibitory concentration (MIC) values ranged from 6 to 20 µg/ml. In addition, LT caused a strong reduction in biofilm formation and disrupted the preformed biofilm. Moreover, results indicated that LT supported cell viability, evidencing hemocompatibility and no cytotoxicity. CONCLUSION Our findings suggest that LT has potential as a therapeutic agent due to its potential antibacterial, anti-biofilm, hemocompatibility, and lack of cytotoxic activities, which may also increase the range of therapy options for skin burn infections, leading to the development of a novel fungal-based drug.
Collapse
Affiliation(s)
- Nessma A. El-Zawawy
- grid.412258.80000 0000 9477 7793Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| | - Sameh Samir Ali
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| | - Hoda S. Nouh
- grid.412258.80000 0000 9477 7793Botany Department, Faculty of Science, Tanta University, Tanta, 31527 Egypt
| |
Collapse
|
8
|
Mirsam H, Suriani, Aqil M, Azrai M, Efendi R, Muliadi A, Sembiring H, Azis AI. Molecular Characterization of Indigenous Microbes and Its Potential as a Biological Control Agent of Fusarium Stem Rot (Fusarium verticillioides) on Maize. Heliyon 2022; 8:e11960. [DOI: 10.1016/j.heliyon.2022.e11960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/14/2022] [Accepted: 11/19/2022] [Indexed: 12/02/2022] Open
|
9
|
Dos Reis JBA, do Vale HMM, Lorenzi AS. Insights into taxonomic diversity and bioprospecting potential of Cerrado endophytic fungi: a review exploring an unique Brazilian biome and methodological limitations. World J Microbiol Biotechnol 2022; 38:202. [PMID: 35999403 DOI: 10.1007/s11274-022-03386-2] [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] [Received: 06/13/2022] [Accepted: 08/10/2022] [Indexed: 11/26/2022]
Abstract
Cerrado is the second largest biome in Brazil, and it is known for harboring a wide variety of endemic plant and microbial species, among which are endophytic fungi. Endophytic fungi are microorganisms capable of colonizing the interior of plant tissues without causing disease in host plants. Especially in the Cerrado biome, this group of microorganisms is still poorly studied and information on species estimation, ecological and evolutionary importance is not accurate and remains unknown. Also, it is extremely important to emphasize that great part of studies available on Cerrado endophytic fungi are national literature, including master's dissertations, course conclusion works or unpublished doctoral theses. The majority of these studies has highlighted that the endemic plant species are an important habitat for fungal endophytes, and new species have increasingly been described. Due to the lack of international literature on Cerrado endophytic fungi, the present review brings a bibliographic survey on taxonomic diversity and bioprospecting potential of fungal endophytes from a unique environment. This review also emphasizes the importance of studying Brazilian endophytic fungi from Cerrado as a source of new technologies (biofertilizer and biocontroller), since they are secondary metabolite-producing organisms with different biological activities for biotechnological, agricultural and pharmaceutical applications.
Collapse
Affiliation(s)
| | - Helson Mário Martins do Vale
- Department of Phytopathology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - Adriana Sturion Lorenzi
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil.
| |
Collapse
|
10
|
Endophytic Diaporthe Associated with Morinda officinalis in China. J Fungi (Basel) 2022; 8:jof8080806. [PMID: 36012794 PMCID: PMC9410054 DOI: 10.3390/jof8080806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/23/2022] [Accepted: 07/26/2022] [Indexed: 12/10/2022] Open
Abstract
Diaporthe species are endophytes, pathogens, and saprobes with a wide host range worldwide. However, little is known about endophytic Diaporthe species associated with Morinda officinalis. In the present study, 48 endophytic Diaporthe isolates were obtained from cultivated M. officinalis in Deqing, Guangdong Province, China. The nuclear ribosomal internal transcribed spacer (ITS), partial sequences of translation elongation factor 1-α (tef1-α), partial calmodulin (cal), histone H3 (his), and Beta-tubulin (β-tubulin) gene regions were sequenced and employed to construct phylogenetic trees. Based on morphology and combined multigene phylogeny, 12 Diaporthe species were identified, including five new species of Diaporthe longiconidialis, D. megabiguttulata, D. morindendophytica, D. morindae, and D. zhaoqingensis. This is the first report of Diaporthe chongqingensis, D. guangxiensis, D. heliconiae, D. siamensis, D. unshiuensis, and D. xishuangbanica on M. officinalis. This study provides the first intensive study of endophytic Diaporthe species on M. officinalis in China. These results will improve the current knowledge of Diaporthe species associated with this traditional medicinal plant. Furthermore, results from this study will help to understand the potential pathogens and biocontrol agents from M. officinalis and to develop a disease management platform.
Collapse
|
11
|
Iantas J, Savi DC, Schibelbein RDS, Noriler SA, Assad BM, Dilarri G, Ferreira H, Rohr J, Thorson JS, Shaaban KA, Glienke C. Endophytes of Brazilian Medicinal Plants With Activity Against Phytopathogens. Front Microbiol 2021; 12:714750. [PMID: 34539608 PMCID: PMC8442585 DOI: 10.3389/fmicb.2021.714750] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/03/2021] [Indexed: 12/14/2022] Open
Abstract
Plant diseases caused by phytopathogens are responsible for significant crop losses worldwide. Resistance induction and biological control have been exploited in agriculture due to their enormous potential. In this study, we investigated the antimicrobial potential of endophytic fungi of leaves and petioles of medicinal plants Vochysia divergens and Stryphnodendron adstringens located in two regions of high diversity in Brazil, Pantanal, and Cerrado, respectively. We recovered 1,304 fungal isolates and based on the characteristics of the culture, were assigned to 159 phenotypes. One isolate was selected as representative of each phenotype and studied for antimicrobial activity against phytopathogens. Isolates with better biological activities were identified based on DNA sequences and phylogenetic analyzes. Among the 159 representative isolates, extracts from 12 endophytes that inhibited the mycelial growth (IG) of Colletotrichum abscissum (≥40%) were selected to expand the antimicrobial analysis. The minimum inhibitory concentrations (MIC) of the extracts were determined against citrus pathogens, C. abscissum, Phyllosticta citricarpa and Xanthomonas citri subsp. citri and the maize pathogen Fusarium graminearum. The highest activity against C. abscissum were from extracts of Pseudofusicoccum stromaticum CMRP4328 (IG: 83% and MIC: 40 μg/mL) and Diaporthe vochysiae CMRP4322 (IG: 75% and MIC: 1 μg/mL), both extracts also inhibited the development of post-bloom fruit drop symptoms in citrus flowers. The extracts were promising in inhibiting the mycelial growth of P. citricarpa and reducing the production of pycnidia in citrus leaves. Among the isolates that showed activity, the genus Diaporthe was the most common, including the new species D. cerradensis described in this study. In addition, high performance liquid chromatography, UV detection, and mass spectrometry and thin layer chromatography analyzes of extracts produced by endophytes that showed high activity, indicated D. vochysiae CMRP4322 and P. stromaticum CMRP4328 as promising strains that produce new bioactive natural products. We report here the capacity of endophytic fungi of medicinal plants to produce secondary metabolites with biological activities against phytopathogenic fungi and bacteria. The description of the new species D. cerradensis, reinforces the ability of medicinal plants found in Brazil to host a diverse group of fungi with biotechnological potential.
Collapse
Affiliation(s)
- Jucélia Iantas
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Daiani Cristina Savi
- Department of Biomedicine, Centro Universitário Católica de Santa Catarina, Joinville, Brazil
- Postgraduate Program of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Renata da Silva Schibelbein
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Sandriele Aparecida Noriler
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | | | - Guilherme Dilarri
- Department of General and Applied Biology, Biosciences Institute, State University of São Paulo, Rio Claro, Brazil
| | - Henrique Ferreira
- Department of General and Applied Biology, Biosciences Institute, State University of São Paulo, Rio Claro, Brazil
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Chirlei Glienke
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
- Postgraduate Program of Genetics, Federal University of Paraná, Curitiba, Brazil
| |
Collapse
|
12
|
dos Santos IR, Abdel-Azeem AM, Mohesien MT, Piekutowska M, Sheir DH, da Silva LL, da Silva Castro C, Carvalho DDC, Bezerra JDP, Saad HA, Borges LL, Xavier-Santos S. Insights into the Bioprospecting of the Endophytic Fungi of the Medicinal Plant Palicourea rigida Kunth (Rubiaceae): Detailed Biological Activities. J Fungi (Basel) 2021; 7:689. [PMID: 34575727 PMCID: PMC8468907 DOI: 10.3390/jof7090689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 01/19/2023] Open
Abstract
A multitude of plants from the Brazilian savanna are known for their medicinal properties. Many plants contain endophytic fungi, which lead to the production of bioactive compounds by both the fungi and their hosts. This study investigated the bioprospecting of endophytic fungi recovered from the leaves of Palicourea rigida, a native medicinal plant of the Brazilian savanna. Four fungal taxa (Colletotrichum sp. SXS649, Pestalotiopsis sp. SXS650, the order Botryosphaeriales SXS651, and Diaporthe sp. SXS652) were recovered. The phenolic, flavonoid, extracellular degrading enzymes (amylase, cellulase, protease, and tannase) and antioxidant activity of these taxa were determined. Evaluation of the antimicrobial activity showed that the Botryosphaeriales SXS651 extract displays a minimum inhibitory concentration (MIC) of 23.20 mg mL-1 against Staphylococcus epidermidis and Pseudomonas aeruginosa, and the Diaporthe sp. SXS652 extract exhibited an MIC of 27.00 mg mL-1 against Escherichia coli. The Colletotrichum sp. SXS649 isolate inhibited tumors in potato discs by 69% at a concentration of 9.70 mg mL-1. All isolates had potential bioremediation criteria against soil contaminated with soybean oil, as proved by a high percentage of germination of Lactuca sativa and a reduction in phytotoxicity. Furthermore, the taxa under investigation demonstrated antagonistic action to phytopathogenic fungi, namely, Aspergillus niger, Inonotus rickii, Pestalotiopsis mangiferae, and Coniophora puteana, with an inhibition range between 34.2% and 76.9%. The preliminary toxicity assessment showed that all isolates possessed an LC50 of less than 100 mg mL-1 to the microcrustacean Artemia salina. These results indicate that the endophytic fungi of the Brazilian savanna are promising candidates for biotechnological and industrial applications and, in agricultural applications, for the biological control of phytopathogenic fungi.
Collapse
Affiliation(s)
- Igor Romeiro dos Santos
- Basic, Applied and Scientific Divulgation Mycolgy Laboratory (FungiLab), Central Campus, State University of Goiás, Anápolis 75132-903, GO, Brazil; (I.R.d.S.); (L.L.d.S.); (C.d.S.C.); (L.L.B.)
| | - Ahmed M. Abdel-Azeem
- Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
| | - Marwa T. Mohesien
- Botany and Microbiology Department, Faculty of Science, Damietta University, New Damietta 34511, Egypt;
| | - Magdalena Piekutowska
- Department of Geoecology and Geoinformation, Institute of Biology and Earth Sciences, Pomeranian University in Słupsk, Partyzantów 27, 76-200 Słupsk, Poland;
| | - Donia H. Sheir
- National Research Centre, Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries Division, Giza 12622, Egypt;
| | - Lucas Leonardo da Silva
- Basic, Applied and Scientific Divulgation Mycolgy Laboratory (FungiLab), Central Campus, State University of Goiás, Anápolis 75132-903, GO, Brazil; (I.R.d.S.); (L.L.d.S.); (C.d.S.C.); (L.L.B.)
| | - Camila da Silva Castro
- Basic, Applied and Scientific Divulgation Mycolgy Laboratory (FungiLab), Central Campus, State University of Goiás, Anápolis 75132-903, GO, Brazil; (I.R.d.S.); (L.L.d.S.); (C.d.S.C.); (L.L.B.)
| | | | - Jadson Diogo Pereira Bezerra
- Mycology Sector, Department of Biosciences and Technology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia 74690-900, GO, Brazil;
| | - Hosam A. Saad
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Leonardo Luiz Borges
- Basic, Applied and Scientific Divulgation Mycolgy Laboratory (FungiLab), Central Campus, State University of Goiás, Anápolis 75132-903, GO, Brazil; (I.R.d.S.); (L.L.d.S.); (C.d.S.C.); (L.L.B.)
| | - Solange Xavier-Santos
- Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
| |
Collapse
|
13
|
Dos Santos GD, Gomes RR, Gonçalves R, Fornari G, Maia BHLNS, Schmidt-Dannert C, Gaascht F, Glienke C, Schneider GX, Colombo IR, Degenhardt-Goldbach J, Pietsch JLM, Costa-Ribeiro MCV, Vicente VA. Molecular Identification and Antimicrobial Activity of Foliar Endophytic Fungi on the Brazilian Pepper Tree (Schinus terebinthifolius) Reveal New Species of Diaporthe. Curr Microbiol 2021; 78:3218-3229. [PMID: 34213615 DOI: 10.1007/s00284-021-02582-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 06/15/2021] [Indexed: 11/26/2022]
Abstract
The presence of endophytes promotes the biosynthesis of secondary plant metabolites. In this study, endophytic fungi were isolated from Schinus terebinthifolius to investigate their diversity and antimicrobial activity. A total of 272 endophytic fungi was obtained. These belonged to nine different genera: Alternaria, Colletotrichum, Diaporthe, Epicoccum, Fusarium, Pestalotiopsis, Phyllosticta, Xylaria, and Cryptococcus. Notably, Diaporthe foliorum was introduced as a new species, with accompanying morphological descriptions, illustrations, and a multigene phylogenetic analysis (using ITS, TEF1, TUB, HIS, and CAL). Among the 26 fungal morphotypes evaluated for antimicrobial activity, five strains had inhibitory effects against pathogenic microorganisms. Xylaria allantoidea CMRP1424 extracts showed antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. Diaporthe terebinthifolii CMRP1430 and CMRP1436 showed antimicrobial activity against E. coli, P. aeruginosa, S. aureus, and C. albicans. Meanwhile, D. foliorum CMRP1321 and D. malorum CMRP1438 extracts inhibited C. albicans alone. Three classes of chemical compounds were identified in D. foliorum CMRP1438 extracts: ferric chloride, potassium hydroxide, and vanillin-sulfuric acid. In conclusion, the endophytic isolates were able to produce bioactive agents with pharmaceutical potential as antibacterial and antifungal agents. As such, they may provide fresh leads in the search for new, biological sources of drug therapies.
Collapse
Affiliation(s)
- Germana D Dos Santos
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Renata R Gomes
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil.
| | - Rosana Gonçalves
- Undergraduate Student in Biomedicine, Federal University of Paraná, Curitiba, PR, Brazil
| | - Gheniffer Fornari
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Beatriz H L N S Maia
- Department of Chemistry, Federal University of Paraná State, Curitiba, PR, Brazil
| | - Claudia Schmidt-Dannert
- Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Avenue, Saint Paul, MN, 55108, USA
| | - Francois Gaascht
- Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Avenue, Saint Paul, MN, 55108, USA
| | - Chirlei Glienke
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Gabriela X Schneider
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Israella R Colombo
- Undergraduate Student in Biomedicine, Federal University of Paraná, Curitiba, PR, Brazil
| | | | - João L M Pietsch
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Magda C V Costa-Ribeiro
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil
| | - Vania A Vicente
- Microbiology, Parasitology and Pathology Post-Graduation Program, Basic Pathology Department, Federal University of Paraná State, Curitiba, 81531-980, Brazil.
| |
Collapse
|
14
|
Plant-associated Fungi: Methods for Taxonomy, Diversity, and Bioactive Secondary Metabolite Bioprospecting. Methods Mol Biol 2021. [PMID: 33161542 DOI: 10.1007/978-1-0716-1040-4_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Plants harbor a large reservoir of fungal diversity, encompassing endophytic, epiphytic, phytopathogenic, and rhizosphere-associated fungi. Despite this diversity, relatively few fungal species have been characterized as sources of bioactive secondary metabolites. The role of secondary metabolites is still not fully understood; however, it is suggested that these metabolites play important roles in defense mechanisms and fungal interactions with other organisms. Hence, fungal secondary metabolites have potential biotechnological applications as prototype molecules for the development of therapeutic drugs. In this chapter, we describe the main methods used for routine fungi isolation, production of crude fungal extracts, and chemical characterization of bioactive compounds. In addition, explicative notes about the steps described are provided to explore the diversity of the endophytic, phytopathogenic, epiphytic, and rhizosphere fungi and to evaluate the biotechnological potential of each group.
Collapse
|
15
|
Dong Z, Manawasinghe IS, Huang Y, Shu Y, Phillips AJL, Dissanayake AJ, Hyde KD, Xiang M, Luo M. Endophytic Diaporthe Associated With Citrus grandis cv. Tomentosa in China. Front Microbiol 2021; 11:609387. [PMID: 33633693 PMCID: PMC7900006 DOI: 10.3389/fmicb.2020.609387] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 12/29/2020] [Indexed: 11/26/2022] Open
Abstract
Diaporthe species are associated with Citrus as endophytes, pathogens, and saprobes worldwide. However, little is known about Diaporthe as endophytes in Citrus grandis in China. In this study, 24 endophytic Diaporthe isolates were obtained from cultivated C. grandis cv. "Tomentosa" in Huazhou, Guangdong Province in 2019. The nuclear ribosomal internal transcribed spacer (ITS), partial sequences of translation elongation factor 1-α (tef1), β-tubulin (tub2), and partial calmodulin (cal) gene regions were sequenced and employed to construct phylogenetic trees. Based on morphology and combined multigene phylogeny, eleven Diaporthe species were identified including two new species, Diaporthe endocitricola and D. guangdongensis. These are the first report of D. apiculata, D. aquatica, D. arecae, D. biconispora, D. limonicola, D. masirevicii, D. passifloricola, D. perseae, and D. sennae on C. grandis. This study provides the first intensive study of endophytic Diaporthe species on C. grandis cv. tomentosa in China. These results will improve the current knowledge of Diaporthe species associated with C. grandis. The results obtained in this study will also help to understand the potential pathogens and biocontrol agents and to develop a platform in disease management.
Collapse
Affiliation(s)
- Zhangyong Dong
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Ishara S. Manawasinghe
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
- Center of Excellence in Fungal Research, Mae Fah Luang University, Mueang Chiang Rai, Thailand
| | - Yinghua Huang
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Yongxin Shu
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Alan J. L. Phillips
- Faculdade de Ciências, Biosystems and Integrative Sciences Institute (BioISI), Universidade de Lisboa, Lisbon, Portugal
| | - Asha J. Dissanayake
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Kevin D. Hyde
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
- Center of Excellence in Fungal Research, Mae Fah Luang University, Mueang Chiang Rai, Thailand
| | - Meimei Xiang
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Mei Luo
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| |
Collapse
|
16
|
Diversity, distribution, and xerophilic tolerance of cultivable fungi associated with the Antarctic angiosperms. Polar Biol 2021. [DOI: 10.1007/s00300-021-02799-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
17
|
Dantas SBS, Alves FAM, Chapla VM. Chemical, diversity and biotechnological potential of endophytic fungi isolated from Brazilian Cerrado plants. BIOTA NEOTROPICA 2021. [DOI: 10.1590/1676-0611-bn-2020-1069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: This is a systematic review of scientific articles reporting the biodiversity of endophytic fungi isolated from endemic Cerrado plants in Brazil and exposes the potential applications of these microorganisms in the production of known and new metabolites. The “Portal de Periódicos” (CAPES), Science Direct, PubMed, Scielo, and Biblioteca Virtual em Saúde (BVS) databases were used. A total of 418 articles were found using the following sets of keywords: Endophytic, fungi, and Cerrado; endophytic, fungi, rupestrian, and grass lands; endophytic, fungi, Brazilian, and savanna; among these, 14 articles were selected. The articles were grouped into studies on the biodiversity of Cerrado endophytic fungi, chemical studies, and other subjects. All the articles were found to be related to the diversity present in the Cerrado of the southeastern and midwestern regions, they show high fungal biodiversity with Diaporthe genus predominant in almost all plants studied. In all the studies on the chemical diversity of endophytic fungi, new compounds or new natural products were found associated with a range of bioactivity, especially antifungal. It shows the great potential of endophytes in the production of new and bioactive secondary metabolites, as well as the unexplored chemical diversity of endophytes isolated from endemic plant species. The review shows that rare studies performed in regions where the Cerrado biome are predominant, including the central, north, and northeast regions, representing an important niche that is still unexplored.
Collapse
|
18
|
Fan M, Chen X, Luo X, Zhang H, Liu Y, Zhang Y, Wu J, Zhao C, Zhao P. Diversity of endophytic fungi from the leaves of Vaccinium dunalianum. Lett Appl Microbiol 2020; 71:479-489. [PMID: 32619301 DOI: 10.1111/lam.13345] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/22/2020] [Accepted: 06/22/2020] [Indexed: 10/23/2022]
Abstract
This study was focus on investigating the community composition of endophytic fungi in the leaves of Vaccinium dunalianum Wight. Based on a combination of morphological features and molecular evidence, 239 endophytic fungal isolates belonging to 33 genera including 62 species were obtained and identified. By comparing the relative abundance (RA) values, the most frequent species belonged to Phyllosticta and Guignardia with RA of 26·78 and 14·22% respectively. Of which, the strains P. capitalensis and G. mangiferae with potential antimicrobial activity were the dominant endophytes to the sampling of leaves. A high diversity of endophytic fungi from V. dunalianum leaves was observed with high species richness S (62), Margalef index D' (11·1386), Shannon-Wiener index H' (3·2588), Simpson's diversity index Ds (0·9179), probability of interspecific encounter index (0·9218), and evenness Pielou index J (0·7896) but a low dominant index λ (0·0821). SIGNIFICANCE AND IMPACT OF THE STUDY: The isolated 239 endophytic fungal strains belong to 33 genera, 62 species, in which a high diversity of endophytic fungi was observed in Vaccinium dunalianum leaves. In this study, two taxa Phyllosticta capitalensis and Guignardia mangiferae with potential antimicrobial activity were the dominant endophytes. This is a promising source of natural bioactive compounds for future agro-industry application.
Collapse
Affiliation(s)
- M Fan
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming, People's Republic of China
| | - X Chen
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming, People's Republic of China
| | - X Luo
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming, People's Republic of China
| | - H Zhang
- Collaborative Innovation Center of Forest Resources Breeding and Utilization in Yunnan, Kunming, People's Republic of China
| | - Y Liu
- Collaborative Innovation Center of Forest Resources Breeding and Utilization in Yunnan, Kunming, People's Republic of China
| | - Y Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, People's Republic of China
| | - J Wu
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming, People's Republic of China
| | - C Zhao
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming, People's Republic of China
| | - P Zhao
- Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming, People's Republic of China.,Collaborative Innovation Center of Forest Resources Breeding and Utilization in Yunnan, Kunming, People's Republic of China
| |
Collapse
|
19
|
Ogaki MB, Vieira R, Muniz MC, Zani CL, Alves TMA, Junior PAS, Murta SMF, Barbosa EC, Oliveira JG, Ceravolo IP, Pereira PO, Rosa CA, Rosa LH. Diversity, ecology, and bioprospecting of culturable fungi in lakes impacted by anthropogenic activities in Maritime Antarctica. Extremophiles 2020; 24:637-655. [PMID: 32533308 DOI: 10.1007/s00792-020-01183-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/02/2020] [Indexed: 12/20/2022]
Abstract
In this study, we accessed culturable fungal assemblages present in the sediments of three lakes potentially impacted anthropogenically in the Fildes Peninsula, King George Island, Antarctica and identified 63 taxa. Cladosporium sp. 2, Pseudeurotium hygrophilum, and Pseudogymnoascus verrucosus were recovered from the sampled sediments of all lakes. High concentrations of metals and the lowest fungal diversity indices were detected in the sediments of the Central Lake, which can be influenced by human activities due to their proximity to research stations to those of the other two lakes, which were far from the Antarctic stations. At least one type of biological activity was demonstrated by 40 fungal extracts. Among these, P. hygrophilum, P. verrucosus, Penicillium glabrum, and Penicillium solitum demonstrated strong trypanocidal, herbicidal, and antifungal activities. Our results suggest that an increase of the anthropogenic activities in the region might have affected the microbial diversity and composition. In addition, the fungal diversity in these lakes may be a useful model to study the effect of anthropogenic activities in Antarctica. We isolated a diverse group of fungal taxa from Antarctic lake sediments, which have the potential to produce novel compounds for the both the medical and agriculture sectors.
Collapse
Affiliation(s)
- Mayara B Ogaki
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - Rosemary Vieira
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brasil
| | - Marcelo C Muniz
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brasil
| | - Carlos L Zani
- Instituto René Rachou, FIOCRUZ-Minas, Belo Horizonte, MG, Brasil
| | - Tânia M A Alves
- Instituto René Rachou, FIOCRUZ-Minas, Belo Horizonte, MG, Brasil
| | | | | | | | | | | | | | - Carlos A Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - Luiz H Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
| |
Collapse
|
20
|
Golias HC, Polonio JC, Dos Santos Ribeiro MA, Polli AD, da Silva AA, Bulla AM, Volpato H, Nakamura CV, Meurer EC, Azevedo JL, Pamphile JA. Tibouchina granulosa (Vell.) Cogn (Melastomataceae) as source of endophytic fungi: isolation, identification, and antiprotozoal activity of metabolites from Phyllosticta capitalensis. Braz J Microbiol 2020; 51:557-569. [PMID: 31872390 PMCID: PMC7203321 DOI: 10.1007/s42770-019-00221-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 12/19/2019] [Indexed: 01/10/2023] Open
Abstract
Endophytes are microorganisms that form symbiotic relationships with their own host. Included in this group are the species Phyllosticta capitalensis, a group of fungi that include saprobes that produce bioactive metabolites. The present study aimed to identify the cultivable endophytic fungal microbiota present in healthy leaves of Tibouchina granulosa (Desr.) Cogn. (Melastomataceae) and investigate secondary metabolites produced by a strain of P. capitalensis and their effects against both Leishmania species and Trypanossoma cruzi. Identification of the strains was accomplished through multilocus sequencing analysis (MLSA), followed by phylogenetic analysis. The frequency of colonization was 73.66% and identified fungi belonged to the genus Diaporthe, Colletotrichum, Phyllosticta, Xylaria, Hypoxylon, Fusarium, Nigrospora, and Cercospora. A total of 18 compounds were identified by high-resolution mass spectrum analysis (UHPLC-HRMS), including fatty acids based on linoleic acid and derivatives, from P. capitalensis. Crude extracts had activity against Leishmania amazonensis, L. infantum, and Trypanosoma cruzi, with inhibitory concentration (IC50) values of 17.2 μg/mL, 82.0 μg/mL, and 50.13 μg/mL, respectively. This is the first report of the production of these compounds by the endophytic P. capitalensis isolated from T. granulosa.
Collapse
Affiliation(s)
- Halison Correa Golias
- Laboratório de Biologia, Universidade Tecnológica Federal do Paraná, Apucarana, Paraná, CEP 86812-460, Brazil
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | - Julio Cesar Polonio
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | | | - Andressa Domingos Polli
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | - Angela Aparecida da Silva
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | - Aline Maria Bulla
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | - Hélito Volpato
- Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | - Celso Vataru Nakamura
- Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil
| | | | - João Lúcio Azevedo
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz - ESALQ/USP, Piracicaba, São Paulo, CEP: 13418-260, Brazil
| | - João Alencar Pamphile
- Departamento de Biotecnologia, Genética e Biologia Celular, Universidade Estadual de Maringá, Maringá, Paraná, CEP: 87020-900, Brazil.
| |
Collapse
|
21
|
Cultivable fungi associated with bryosphere of bipolar mosses Polytrichastrum alpinum and Polytrichum juniperinum in King George Island, South Shetland Islands, Maritime Antarctica. Polar Biol 2020. [DOI: 10.1007/s00300-020-02658-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
22
|
da Rosa BV, Kuhn KR, Ugalde GA, Zabot GL, Kuhn RC. Antioxidant compounds extracted from Diaporthe schini using supercritical CO 2 plus cosolvent. Bioprocess Biosyst Eng 2019; 43:133-141. [PMID: 31542822 DOI: 10.1007/s00449-019-02211-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 09/06/2019] [Accepted: 09/08/2019] [Indexed: 11/26/2022]
Abstract
Endophytic fungi have been highlight in the production of secondary metabolites with different bioactive properties, such as in the production of the antioxidant compounds. Therefore, the objective of this work was the extraction of the antioxidant compounds from the biomass of Diaporthe schini using supercritical carbon dioxide (CO2) without and with ethanol as cosolvent. The biomass was produced by submerged fermentation and the parameters evaluated in the extraction process were: pressure (150-250 bar), temperature (40-60 ºC) and cosolvent [biomass: cosolvent ratio, 1:0, 1:0.75 and 1:1.5 (w/v)]. Extraction yield, antioxidant activity and chemical composition of the extracts were determined. The highest extraction yield (3.24 wt.%) and the best antioxidant activity against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical (96.62%) were obtained at 40 ºC, 250 bar and biomass:cosolvent ratio of 1:1.5 (w/v). The chemical compounds 1,4-diaza-2,5-dioxo-3-isobutyl bicyclo[4.3.0]nonane and benzeneethanol identified in GC/MS could be responsible for the antioxidant activity found in this study.
Collapse
Affiliation(s)
- Barbara Vargas da Rosa
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima avenue, Santa Maria, 97105-900, Brazil
| | - Kátia Regina Kuhn
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima avenue, Santa Maria, 97105-900, Brazil
| | - Gustavo Andrade Ugalde
- Department of Agricultural Engineering, Federal University of Santa Maria, 1000, Roraima avenue, Santa Maria, 97105-900, Brazil
| | - Giovani Leone Zabot
- Laboratory of Agroindustrial Processes Engineering (LAPE), Federal University of Santa Maria, 1040, Sete de Setembro St., Centre DC, Cachoeira Do Sul, RS, 96508-010, Brazil
| | - Raquel Cristine Kuhn
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima avenue, Santa Maria, 97105-900, Brazil.
| |
Collapse
|
23
|
Endophytic Fungi: Biodiversity, Ecological Significance, and Potential Industrial Applications. RECENT ADVANCEMENT IN WHITE BIOTECHNOLOGY THROUGH FUNGI 2019. [DOI: 10.1007/978-3-030-10480-1_1] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
24
|
Venkateswarulu N, Shameer S, Bramhachari PV, Basha SKT, Nagaraju C, Vijaya T. Isolation and characterization of plumbagin (5- hydroxyl- 2- methylnaptalene-1,4-dione) producing endophytic fungi Cladosporium delicatulum from endemic medicinal plants: Isolation and characterization of plumbagin producing endophytic fungi from endemic medicinal plants. ACTA ACUST UNITED AC 2018; 20:e00282. [PMID: 30294561 PMCID: PMC6171049 DOI: 10.1016/j.btre.2018.e00282] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 09/18/2018] [Accepted: 09/24/2018] [Indexed: 01/08/2023]
Abstract
Diversity of endophytic fungi from endemic medicinal plants in Eastern Ghats. Molecular identification and anti-microbial activity of isolated endophytic cultures. GCMS analysis and compound identification of potential crud extract. Characterization of purified fraction using FTIR spectroscopy, MS and NMR. Potentially inhibition of tested pathogens by identified compound 5-hydroxy-2-methylnaphthalene-1, 4-Dione.
The rationale of the present study was to isolate and identify endophytic fungi from endemic medicinal plants in Eastern Ghats and screened for antimicrobial potential of isolated fungal crude extracts. A total of 329 endophytic strains were isolated from 600 infected leaves and stem cuttings of endemic plants. The diversity and species richness was analyzed statistically and found to be higher in leaf segments than in stem segments. From isolated fungal strains, Cladosporium delicatulum was identified using molecular identification methods and selected as the most potent plumbagin-producing endophytic strain. Further the isolation and structural characterization of endophytic fungal plumbagin (5-hydroxyl-2-methylnaptalene-1,4-dione) was purified and confirmed through spectroscopy analysis. The molecular weight was determined as m/z 188 in positive mode by ESI-MS, which confirmed to be plumbagin which potentially inhibited all tested pathogens, therefore the endophytic fungal plumbagin from the current study possesses important biological activities against pathogens.
Collapse
Affiliation(s)
- N Venkateswarulu
- Department of Botany, Sri Venkateswara University, Tirupati, 517502, A.P, India
| | - S Shameer
- Nanotechnology Laboratory, IFT, RARS, ANGRAU, Tirupati, 517502, A.P, India
| | - P V Bramhachari
- Department of Biotechnology, Krishna University, Machilipatnam, 521001, A.P, India
| | - S K Thaslim Basha
- Department of Chemistry, Sri Venkateswara University, Tirupati, 517502, A.P, India
| | - C Nagaraju
- Department of Chemistry, Sri Venkateswara University, Tirupati, 517502, A.P, India
| | - T Vijaya
- Department of Botany, Sri Venkateswara University, Tirupati, 517502, A.P, India
| |
Collapse
|
25
|
Noriler SA, Savi DC, Aluizio R, Palácio-Cortes AM, Possiede YM, Glienke C. Bioprospecting and Structure of Fungal Endophyte Communities Found in the Brazilian Biomes, Pantanal, and Cerrado. Front Microbiol 2018; 9:1526. [PMID: 30087658 PMCID: PMC6066559 DOI: 10.3389/fmicb.2018.01526] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/19/2018] [Indexed: 01/08/2023] Open
Abstract
Medicinal plants have been recognized as hosts of high diverse endophytic microorganisms, including fungi that produce secondary metabolites with biological activity. Two biomes in Brazil, Pantanal (wetland), and Cerrado (savannah), are known as biodiversity hotspots, and despite their importance as a reservoir for several species, knowledge about the fungal biodiversity in these biomes is very limited. Fungal endophytic communities associated with leaves and petioles of the medicinal plants Vochysia divergens (from Pantanal) and Stryphnodendron adstringens (from Cerrado) were analyzed and studied for their antimicrobial activity against human and plant pathogens. A total of 1,146 isolates of endophytic fungi were obtained from plants collected in January and June of 2016 and grouped into 124 morphotypes. One isolate of each morphotype was identified by sequencing of internal transcribed spacer (ITS) region of the rDNA gene, which revealed the presence of 24 genera, including 3 possible new genera, and 48 taxa. Differences in the endophytic community according to the biomes were observed concerning the analyzed morphotypes. However, when we analyzed the diversity of genera and richness, they were similar for both plants, with Diaporthe, Phyllosticta, and Neofusicoccum as dominant genera. In addition, the community composition of V. divergens differs according to the analyzed plant tissues (petiole and leaf). These data suggested that both, the plant species and plant tissues play a role in the composition of endophytic community. As regards the biotechnological potential, 5 isolates showed activity against the phytopathogens Phyllosticta citricarpa, Colletotrichum abscissum, and Fusarium verticilioides, and 8 isolates showed high activity against clinical pathogens and were selected for the production of crude extract in different culture media. Extract from cultivation of Diaporthe sp. LGMF1548 and LGMF1583 and Neofusicoccum brasiliense LGMF1535 showed activity against methicillin-resistant Staphylococcus aureus, Klebssiella pneumonia, and Candida albicans. In addition, extracts of Diaporthe cf. heveae LGMF1631 inhibited 90% of the mycelial growth of the P. citricarpa and 70% of C. abscissum and may represent an alternative to be used in the biological control of these phytopathogens. Future research will focus on the chemical characterization and structural elucidation of these bioactive compounds.
Collapse
Affiliation(s)
| | - Daiani C. Savi
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Rodrigo Aluizio
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| | | | - Yvelise M. Possiede
- Department of Biology, Federal University of Mato Grosso do Sul, Campo Grande, Brazil
| | - Chirlei Glienke
- Department of Genetics, Federal University of Paraná, Curitiba, Brazil
| |
Collapse
|
26
|
Carvalho CRD, Ferreira-D'Silva A, Wedge DE, Cantrell CL, Rosa LH. Antifungal activities of cytochalasins produced by Diaporthe miriciae, an endophytic fungus associated with tropical medicinal plants. Can J Microbiol 2018; 64:835-843. [PMID: 29874477 DOI: 10.1139/cjm-2018-0131] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, we evaluated the antifungal potential of cytochalasins produced by Diaporthe taxa against phytopathogenic fungi. Using molecular methods, seven endophytic fungal strains from the medicinal plants Copaifera pubiflora and Melocactus ernestii were identified as Diaporthe miriciae, while two isolates were identified to the genus level (Diaporthe sp.). All crude extracts of Diaporthe species produced via solid-state fermentation were evaluated by 1H NMR analyses. Crude extracts of the isolates D. miriciae UFMGCB 6350, 7719, 7646, 7653, 7701, 7772, and 7770 and Diaporthe sp. UFMGCB 7696 and 7720 were demonstrated to produce highly functionalized compounds. The extracts of D. miriciae UFMGCB 7719 and 6350 were selected as representative Diaporthe samples and subjected to bioassay-directed fractionation to isolate cytochalasins H and J. Cytochalasins H and J were evaluated for activities against the fungal plant pathogens Colletotrichum fragariae, Colletotrichum gloeosporioides, Colletotrichum acutatum, Botrytis cinerea, Fusarium oxysporum, Phomopsis obscurans, and Phomopsis viticola using microdilution broth assays. Cytochalasins H and J exhibited the most potent activities against the Phomopsis species tested. Our results showed that Diaporthe species were potential producers of different cytochalasins, which exhibit potential for controlling fungal diseases in planta and (or) maintaining antagonism.
Collapse
Affiliation(s)
- C R de Carvalho
- a Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, MG, P.O. Box 486, CEP 31270-901, Brazil
| | - A Ferreira-D'Silva
- a Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, MG, P.O. Box 486, CEP 31270-901, Brazil
| | - D E Wedge
- b Natural Products Utilization Research Unit, United States Department of Agriculture, Agricultural Research Service, University, MS 38677, USA
| | - C L Cantrell
- b Natural Products Utilization Research Unit, United States Department of Agriculture, Agricultural Research Service, University, MS 38677, USA
| | - L H Rosa
- a Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, MG, P.O. Box 486, CEP 31270-901, Brazil
| |
Collapse
|
27
|
Soares DA, de Oliveira DP, Dos Santos TT, Marson PG, Pimenta RS. Multiloci identification of Diaporthe fungi isolated from the medicinal plant Costus spiralis (Jacq.) Roscoe (Costaceae). J Appl Microbiol 2018; 125:172-180. [PMID: 29603526 DOI: 10.1111/jam.13769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 03/08/2018] [Accepted: 03/23/2018] [Indexed: 11/28/2022]
Abstract
AIMS The purpose of this study is to identify species from genus Diaporthe associated with a medicinal plant Costus spiralis by ITS, EF 1-α, TUB and CAL gens. METHODS AND RESULTS The 30 isolates from the genus Diaporthe associated with the medicinal plant Costus spiralis were characterized based on morphological characters and the microculture technique and grouped by DNA fingerprinting with the ISSP gene. Afterwards, a total of 12 isolates were selected for the identification of the species based on the comparative research on the blast through the sequences of the ITS gene. Phylogenetic Tree of Maximum Likelihood were generated with the ITS gene individually and with the genes ITS, TUB, CAL and EF1-α combined with the Diaporthe species recognized and with the additional sequences obtained from GenBank for these species. CONCLUSIONS It was not possible to characterize the 30 isolates microscopically and macromorphologically through the microculture technique and the macromorphological characteristics. The 12 isolates selected based on the DNA fingerprinting profile identified phylogenetically, revealed five distinct species of Diaporthe which are present in C. spiralis. SIGNIFICANCE AND IMPACT OF THE STUDY The molecular analyses used in this study are excellent alternatives for species-level identification of Diaporthe associated with medicinal plants.
Collapse
Affiliation(s)
- D A Soares
- Universidade Federal do Tocantins (UFT), Palmas, Brazil
| | | | | | - P G Marson
- Universidade Federal do Tocantins (UFT), Palmas, Brazil
| | - R S Pimenta
- Universidade Federal do Tocantins (UFT), Palmas, Brazil
| |
Collapse
|
28
|
Yu J, Wu Y, He Z, Li M, Zhu K, Gao B. Diversity and Antifungal Activity of Endophytic Fungi Associated with Camellia oleifera. MYCOBIOLOGY 2018; 46:85-91. [PMID: 29963309 PMCID: PMC6023251 DOI: 10.1080/12298093.2018.1454008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 12/26/2017] [Accepted: 01/02/2018] [Indexed: 05/20/2023]
Abstract
Endophytic fungi strains (n = 81) were isolated from the leaves, barks, and fruits of Camellia oleifera from Hunan province (China) to delineate their species composition and potential as biological control agents of C. oleifera anthracnose. The fungi were identified by morphological and phylogenetic analyses. Fungal colonization rates of the leaves, barks, and fruits were 58.02, 27.16, and 14.81%, respectively. The isolates were identified as 14 genera, belonging to two subdivisions, Deuteromycotina and Ascomycotina; 87.65% of all isolates belonged to Deuteromycotina. The dominant species, occurring with a high relative frequency, were Pestalotiopsis sp. (14.81%), Penicillium sp. (14.81%), and Fusarium sp. (12.35%). The Simpson's and Shannon's diversity indices revealed the highest species diversity in the leaves, followed by the barks and fruits. The similarity index for the leaves versus barks comparison was the highest, indicating that the number of endophytic fungal species shared by the leaves and barks was higher than barks and fruits or leaves and fruits. Based on the results of dual culture experiments, only five strains exhibited antifungal activity against C. oleifera anthracnose pathogen, with isolate ty-64 (Oidium sp.) generating the broadest inhibition zones. Our results indicate that the endophytes associated with C. oleifera could be employed as natural agents controlling C. oleifera anthracnose.
Collapse
Affiliation(s)
- Jinxiu Yu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
- Hunan Academy of Forestry, Changsha, Hunan, China
- Camellia oleifera Research and Development Center of State Forestry Administration, Changsha, Hunan, China
| | - Ying Wu
- Hunan Academy of Forestry, Changsha, Hunan, China
- Camellia oleifera Research and Development Center of State Forestry Administration, Changsha, Hunan, China
| | - Zhen He
- Hunan Academy of Forestry, Changsha, Hunan, China
- Camellia oleifera Research and Development Center of State Forestry Administration, Changsha, Hunan, China
| | - Mi Li
- Hunan Academy of Forestry, Changsha, Hunan, China
- Camellia oleifera Research and Development Center of State Forestry Administration, Changsha, Hunan, China
| | - Kaiming Zhu
- Hunan Academy of Forestry, Changsha, Hunan, China
- Camellia oleifera Research and Development Center of State Forestry Administration, Changsha, Hunan, China
| | - Bida Gao
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, Hunan, China
- CONTACT Bida Gao
| |
Collapse
|
29
|
Ferreira MC, Cantrell CL, Wedge DE, Gonçalves VN, Jacob MR, Khan S, Rosa CA, Rosa LH. Antimycobacterial and antimalarial activities of endophytic fungi associated with the ancient and narrowly endemic neotropical plant Vellozia gigantea from Brazil. Mem Inst Oswaldo Cruz 2017; 112:692-697. [PMID: 28953997 PMCID: PMC5607518 DOI: 10.1590/0074-02760170144] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/11/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Endophytic fungi, present mainly in the Ascomycota and Basidiomycota phyla, are associated with different plants and represent important producers of bioactive natural products. Brazil has a rich biodiversity of plant species, including those reported as being endemic. Among the endemic Brazilian plant species, Vellozia gigantea (Velloziaceae) is threatened by extinction and is a promising target to recover endophytic fungi. OBJECTIVE The present study focused on bioprospecting of bioactive compounds of the endophytic fungi associated with V. gigantea, an endemic, ancient, and endangered plant species that occurs only in the rupestrian grasslands of Brazil. METHODS The capability of 285 fungal isolates to produce antimicrobial and antimalarial activities was examined. Fungi were grown at solid-state fermentation to recover their crude extracts in dichloromethane. Bioactive extracts were analysed by chromatographic fractionation and NMR and displayed compounds with antimicrobial, antimycobacterial, and antimalarial activities. FINDINGS Five fungi produced antimicrobial and antimalarial compounds. Extracts of Diaporthe miriciae showed antifungal, antibacterial, and antimalarial activities; Trichoderma effusum displayed selective antibacterial activity against methicillin-resistant Staphylococcus aureus and Mycobacterium intracellulare; and three Penicillium species showed antibacterial activity. D. miriciae extract contained highly functionalised secondary metabolites, yielding the compound epoxycytochalasin H with high antimalarial activity against the chloroquine-resistant strain of Plasmodium falciparum, with an IC50 approximately 3.5-fold lower than that with chloroquine. MAIN CONCLUSION Our results indicate that V. gigantea may represent a microhabitat repository hotspot of potential fungi producers of bioactive compounds and suggest that endophytic fungal communities might be an important biological component contributing to the fitness of the plants living in the rupestrian grassland.
Collapse
Affiliation(s)
- Mariana C Ferreira
- Universidade Federal de Minas Gerais, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Charles L Cantrell
- United States Department of Agriculture, Natural Products Utilization Research Unit, Mississippi, USA
| | - David E Wedge
- United States Department of Agriculture, Natural Products Utilization Research Unit, Mississippi, USA
| | - Vívian N Gonçalves
- Universidade Federal de Minas Gerais, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Melissa R Jacob
- University of Mississippi, National Center for Natural Products Research, Mississippi, USA
| | - Shabana Khan
- University of Mississippi, National Center for Natural Products Research, Mississippi, USA
| | - Carlos A Rosa
- Universidade Federal de Minas Gerais, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Luiz H Rosa
- Universidade Federal de Minas Gerais, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| |
Collapse
|
30
|
Barbosa PDPM, Speranza P, Ohara A, da Silva ÉB, de Angelis DA, Macedo GA. Fungi from Brazilian Savannah and Atlantic rainforest show high antibacterial and antifungal activity. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.01.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
31
|
Ferreira MC, Cantrell CL, Wedge DE, Gonçalves VN, Jacob MR, Khan S, Rosa CA, Rosa LH. Diversity of the endophytic fungi associated with the ancient and narrowly endemic neotropical plant Vellozia gigantea from the endangered Brazilian rupestrian grasslands. BIOCHEM SYST ECOL 2017. [DOI: 10.1016/j.bse.2017.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Katoch M, Phull S, Vaid S, Singh S. Diversity, Phylogeny, anticancer and antimicrobial potential of fungal endophytes associated with Monarda citriodora L. BMC Microbiol 2017; 17:44. [PMID: 28264654 PMCID: PMC5339955 DOI: 10.1186/s12866-017-0961-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 02/21/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Present study focuses on diversity and distribution analysis of endophytic fungi associated with different tissues of the Monarda citriodora Cerv. ex Lag. (Lamiaceae/Labiatae). Anticancer and antimicrobial potential of isolated endophytes have also been investigated. RESULTS A total of twenty eight fungal endophytes belonging to 11 different genera were isolated from this plant. All the endophytic fungi belonged to the Ascomycota phylum. The leaves were immensely rich in fungal species, while roots showed the highest tissue specific fungal dominance. Out of 28 fungal species, 72% endophytic extracts were found cytotoxic against one or more human cancer cell lines. The most prominent anticancer activity (IC50 value <10 μg/mL) was shown by MC-14 L (Fusarium oxysporum), MC-14 F (F. oxysporum), MC-18 L (Aspergillus fumigatus), MC-24 L (Cladosporium tenuissimum), MC-25 L (Fusarium sp.), MC-26 F (F. oxysporum) extracts. 75% of the extracts showed antimicrobial activities in agar disc-diffusion assay and 27% in the tube dilution method (MIC <100 μg/mL) respectively against the tested pathogens. Extracts of MC-14 L (F. oxysporum) and MC-18 L (A. fumigatus) displayed broad spectrum antimicrobial activity. CONCLUSIONS These results indicated that M. citriodora harbors a rich fungal endophytic community with anticancer and antimicrobial activities. The isolated endophyte MC-24 L (C. tenuissimum) has the potential to be a source of novel cytotoxic/antimicrobial compounds. This is the first report of diversity of fungal endophytes isolated from M. citriodora.
Collapse
Affiliation(s)
- Meenu Katoch
- Microbial Biotechnology Division, Indian Institute of Integrative Medicine, Jammu, India.
| | - Shipra Phull
- Microbial Biotechnology Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Shagun Vaid
- Cancer Pharmacology Divison, Indian Institute of Integrative Medicine, Jammu, India
| | - Shashank Singh
- Cancer Pharmacology Divison, Indian Institute of Integrative Medicine, Jammu, India
| |
Collapse
|
33
|
Isolation and characterization of trichalasin-producing endophytic fungus from Taxus baccata. ANN MICROBIOL 2017. [DOI: 10.1007/s13213-017-1256-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
|
34
|
Pereira CB, Pereira de Sá N, Borelli BM, Rosa CA, Barbeira PJS, Cota BB, Johann S. Antifungal activity of eicosanoic acids isolated from the endophytic fungus Mycosphaerella sp. against Cryptococcus neoformans and C. gattii. Microb Pathog 2016; 100:205-212. [PMID: 27693577 DOI: 10.1016/j.micpath.2016.09.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 09/16/2016] [Accepted: 09/26/2016] [Indexed: 11/25/2022]
Abstract
The antifungal effects of two eicosanoic acids, 2-amino-3,4-dihydroxy-2-25-(hydroxymethyl)-14-oxo-6,12-eicosenoic acid (compound 1) and myriocin (compound 2), isolated from Mycosphaerella sp. were evaluated against Cryptococcus neoformans and C. gattii. The compounds displayed antifungal activities against several isolates of C. neoformans and C. gattii, with minimal inhibitory concentration (MIC) values ranging from 0.49 to 7.82 μM for compound 1 and 0.48-1.95 μM for compound 2. In the checkerboard microtiter test, both compounds exhibited synergistic activity with amphotericin B against C. gattii. Ultrastructural analysis revealed several signs of damage in C. gattii and C. neoformans cells treated with compounds 1 and 2, including deformities in cell shape, depressions on the surface, and withered cells. The cells of C. gattii treated with compounds 1 and 2 showed less loss of cellular material in comparison to those treated with amphotericin B. The difference in cellular material loss increased in a test compound concentration-dependent manner. Consistent with this observation, compounds 1 and 2 were able to internalize propidium iodide (PI) in C. gattii cells. In addition, compound 2 induced the formation of several pseudohyphae, suggesting that it could reduce virulence in C. gattii cells. The study results show that these natural products led to membrane damage; however, this may not be the main target of action. These compounds have potential antifungal activity and could be useful in further studies for developing more effective combination therapies with amphotericin B and reducing side effects in patients.
Collapse
Affiliation(s)
- Cristiane Bigatti Pereira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Laboratório de Química de Produtos Naturais Bioativos, Centro de Pesquisa René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | - Nívea Pereira de Sá
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Beatriz Martins Borelli
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carlos Augusto Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Paulo Jorge Sanches Barbeira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Betania Barros Cota
- Laboratório de Química de Produtos Naturais Bioativos, Centro de Pesquisa René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | - Susana Johann
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| |
Collapse
|
35
|
Christian N, Sullivan C, Visser ND, Clay K. Plant Host and Geographic Location Drive Endophyte Community Composition in the Face of Perturbation. MICROBIAL ECOLOGY 2016; 72:621-632. [PMID: 27341838 DOI: 10.1007/s00248-016-0804-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
All plants form symbioses with endophytic fungi, which affect host plant health and function. Most endophytic fungi are horizontally transmitted, and consequently, local environment and geographic location greatly influence endophyte community composition. Growing evidence also suggests that identity of the plant host (e.g., species, genotype) can be important in shaping endophyte communities. However, little is known about how disturbances to plants affect their fungal symbiont communities. The goal of this study was to test if disturbances, from both natural and anthropogenic sources, can alter endophyte communities independent of geographic location or plant host identity. Using the plant species white snakeroot (Ageratina altissima; Asteraceae), we conducted two experiments that tested the effect of perturbation on endophyte communities. First, we examined endophyte response to leaf mining insect activity, a natural perturbation, in three replicate populations. Second, for one population, we applied fungicide to plant leaves to test endophyte community response to an anthropogenic perturbation. Using culture-based methods and Sanger sequencing of fungal isolates, we then examined abundance, diversity, and community structure of endophytic fungi in leaves subjected to perturbations by leaf mining and fungicide application. Our results show that plant host individual and geographic location are the major determinants of endophyte community composition even in the face of perturbations. Unexpectedly, we found that leaf mining did not impact endophyte communities in white snakeroot, but fungicide treatment resulted in small but significant changes in endophyte community structure. Together, our results suggest that endophyte communities are highly resistant to biotic and anthropogenic disturbances.
Collapse
Affiliation(s)
- Natalie Christian
- Evolution, Ecology and Behavior Program, Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA.
| | - Courtney Sullivan
- Medical Sciences Program, Indiana University School of Medicine, 1001 E. 3rd St., Bloomington, IN, 47405, USA
| | - Noelle D Visser
- Evolution, Ecology and Behavior Program, Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA
| | - Keith Clay
- Evolution, Ecology and Behavior Program, Department of Biology, Indiana University, 1001 E. 3rd St., Bloomington, IN, 47405, USA
| |
Collapse
|
36
|
Carvalho CR, Wedge DE, Cantrell CL, Silva‐Hughes AF, Pan Z, Moraes RM, Madoxx VL, Rosa LH. Molecular Phylogeny, Diversity, and Bioprospecting of Endophytic Fungi Associated with wild Ethnomedicinal North American Plant
Echinacea purpurea
(Asteraceae). Chem Biodivers 2016; 13:918-30. [DOI: 10.1002/cbdv.201500299] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 02/04/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Camila R. Carvalho
- Department of Microbiology Institute of Biological Science Federal University of Minas Gerais P.O. Box 486 Belo Horizonte MG CEP 31270‐901 Brazil
| | - David E. Wedge
- Natural Products Utilization Research Unit United States Department of Agriculture, Agricultural Research Service University Oxford MS 38677 USA
| | - Charles L. Cantrell
- Natural Products Utilization Research Unit United States Department of Agriculture, Agricultural Research Service University Oxford MS 38677 USA
| | - Alice F. Silva‐Hughes
- Department of Microbiology Institute of Biological Science Federal University of Minas Gerais P.O. Box 486 Belo Horizonte MG CEP 31270‐901 Brazil
| | - Zhiqiang Pan
- Natural Products Utilization Research Unit United States Department of Agriculture, Agricultural Research Service University Oxford MS 38677 USA
| | - Rita M. Moraes
- National Center for Natural Products Research School of Pharmacy The University of Mississippi University Oxford MS 38677 USA
- Center for Water and Wetland Resources The University of Mississippi Abbeville MS 38601 USA
| | - Victor L. Madoxx
- Geosystems Research Institute Mississippi State University Starkville MS 39762 USA
| | - Luiz H. Rosa
- Department of Microbiology Institute of Biological Science Federal University of Minas Gerais P.O. Box 486 Belo Horizonte MG CEP 31270‐901 Brazil
| |
Collapse
|
37
|
Conti R, Chagas FO, Caraballo-Rodriguez AM, Melo WGDP, do Nascimento AM, Cavalcanti BC, de Moraes MO, Pessoa C, Costa-Lotufo LV, Krogh R, Andricopulo AD, Lopes NP, Pupo MT. Endophytic Actinobacteria from the Brazilian Medicinal Plant Lychnophora ericoides Mart. and the Biological Potential of Their Secondary Metabolites. Chem Biodivers 2016; 13:727-36. [PMID: 27128202 DOI: 10.1002/cbdv.201500225] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 01/14/2016] [Indexed: 12/25/2022]
Abstract
Endophytic actinobacteria from the Brazilian medicinal plant Lychnophora ericoides were isolated for the first time, and the biological potential of their secondary metabolites was evaluated. A phylogenic analysis of isolated actinobacteria was accomplished with 16S rRNA gene sequencing, and the predominance of the genus Streptomyces was observed. All strains were cultured on solid rice medium, and ethanol extracts were evaluated with antimicrobial and cytotoxic assays against cancer cell lines. As a result, 92% of the extracts showed a high or moderate activity against at least one pathogenic microbial strain or cancer cell line. Based on the biological and chemical analyses of crude extracts, three endophytic strains were selected for further investigation of their chemical profiles. Sixteen compounds were isolated, and 3-hydroxy-4-methoxybenzamide (9) and 2,3-dihydro-2,2-dimethyl-4(1H)-quinazolinone (15) are reported as natural products for the first time in this study. The biological activity of the pure compounds was also assessed. Compound 15 displayed potent cytotoxic activity against all four tested cancer cell lines. Nocardamine (2) was only moderately active against two cancer cell lines but showed strong activity against Trypanosoma cruzi. Our results show that endophytic actinobacteria from L. ericoides are a promising source of bioactive compounds.
Collapse
Affiliation(s)
- Raphael Conti
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil.,CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil
| | - Fernanda Oliveira Chagas
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil.,CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil
| | - Andrés Mauricio Caraballo-Rodriguez
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil.,CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil
| | - Weilan Gomes da Paixão Melo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil.,CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil
| | | | | | | | - Cláudia Pessoa
- Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brazil.,Fundação Oswaldo Cruz (Fiocruz), Fortaleza, CE, Brazil
| | | | - Renata Krogh
- CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil.,Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Adriano Defini Andricopulo
- CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil.,Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Norberto Peporine Lopes
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Mônica Tallarico Pupo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil. .,CEPID-CIBFar - Centro de Pesquisa e Inovação em Biodiversidade e Fármacos, FAPESP, São Paulo, SP, Brazil.
| |
Collapse
|
38
|
Yang HR, Hu XP, Jiang CJ, Qi J, Wu YC, Li W, Zeng YJ, Li CF, Liu SX. Diversity and antimicrobial activity of endophytic fungi isolated from Cephalotaxus hainanensis Li, a well-known medicinal plant in China. Lett Appl Microbiol 2015; 61:484-90. [PMID: 26280451 DOI: 10.1111/lam.12483] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 07/22/2015] [Accepted: 08/06/2015] [Indexed: 11/29/2022]
Abstract
UNLABELLED About 1051 endophytic fungi were isolated from leaves, branches, barks and stems of Cephalotaxus hainanensis Li from four sites in Hainan, China. The fungi were identified as 21 genera by morphology and ITS sequences. One dominant species was Phomopsis quercella in Hainan Tropical Botanical Garden and Bawangling Nature Reserve, with relative frequency of 42·06 and 34·88% respectively. Another dominant species was Colletotrichum boninense in Wuzhishan and Jianfengling Nature Reserves, with relative frequency of 36·84 and 46·97% respectively. Among the selected 21 endophytic fungi, 17 strains (80·95%) had activity against at least one pathogenic bacteria, and 14 strains (66·67%) exhibited activity against at least one fungal pathogens. Neonectria macroconidialis showed strong inhibition against Staphylococcus aureus (inhibition zone being 20 mm), Bacillus subtilis (14 mm) and Streptococcus agalactiae (28 mm). Xylaria sp. showed strong inhibition against Escherichia coli (20 mm), Rhizoctonia solani (20 mm) and Sclerotinia sclerotiorum (17 mm). Verticillium bulbillosum showed great activity against Strep. agalactiae (32 mm) and Fusarium oxysporum (22 mm). These endophytic fungi showed potentials in medicine development. SIGNIFICANCE AND IMPACT OF THE STUDY Endophytic fungi from medicinal plants are an important source of novel and viable drugs. Cephalotaxus hainanensis Li is well known for leukaemia treatment and its endophytic fungi were isolated to investigate the diversity and antimicrobial activity. It was found that Ce. hainanensis Li had rich endophytic fungi, and some fungi showed strong antimicrobial activity against certain pathogens. These fungi can be used in medicine development.
Collapse
Affiliation(s)
- H R Yang
- College of Food Science and Technology, Hainan University, Haikou, China
| | - X P Hu
- College of Food Science and Technology, Hainan University, Haikou, China
| | - C J Jiang
- College of Food Science and Technology, Hainan University, Haikou, China
| | - J Qi
- College of Food Science and Technology, Hainan University, Haikou, China
| | - Y C Wu
- College of Food Science and Technology, Hainan University, Haikou, China
| | - W Li
- College of Food Science and Technology, Hainan University, Haikou, China
| | - Y J Zeng
- College of Food Science and Technology, Hainan University, Haikou, China
| | - C F Li
- College of Food Science and Technology, Hainan University, Haikou, China
| | - S X Liu
- College of Food Science and Technology, Hainan University, Haikou, China
| |
Collapse
|
39
|
Gonçalves VN, Cantrell CL, Wedge DE, Ferreira MC, Soares MA, Jacob MR, Oliveira FS, Galante D, Rodrigues F, Alves TMA, Zani CL, Junior PAS, Murta S, Romanha AJ, Barbosa EC, Kroon EG, Oliveira JG, Gomez-Silva B, Galetovic A, Rosa CA, Rosa LH. Fungi associated with rocks of the Atacama Desert: taxonomy, distribution, diversity, ecology and bioprospection for bioactive compounds. Environ Microbiol 2015; 18:232-45. [PMID: 26235221 DOI: 10.1111/1462-2920.13005] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 07/21/2015] [Accepted: 07/23/2015] [Indexed: 12/01/2022]
Abstract
This study assessed the diversity of cultivable rock-associated fungi from Atacama Desert. A total of 81 fungal isolates obtained were identified as 29 Ascomycota taxa by sequencing different regions of DNA. Cladosporium halotolerans, Penicillium chrysogenum and Penicillium cf. citrinum were the most frequent species, which occur at least in four different altitudes. The diversity and similarity indices ranged in the fungal communities across the latitudinal gradient. The Fisher-α index displayed the higher values for the fungal communities obtained from the siltstone and fine matrix of pyroclastic rocks with finer grain size, which are more degraded. A total of 23 fungal extracts displayed activity against the different targets screened. The extract of P. chrysogenum afforded the compounds α-linolenic acid and ergosterol endoperoxide, which were active against Cryptococcus neoformans and methicillin-resistance Staphylococcus aureus respectively. Our study represents the first report of a new habitat of fungi associated with rocks of the Atacama Desert and indicated the presence of interesting fungal community, including species related with saprobes, parasite/pathogen and mycotoxigenic taxa. The geological characteristics of the rocks, associated with the presence of rich resident/resilient fungal communities suggests that the rocks may provide a favourable microenvironment fungal colonization, survival and dispersal in extreme conditions.
Collapse
Affiliation(s)
- Vívian N Gonçalves
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Charles L Cantrell
- United States Department of Agriculture, Natural Products Utilization Research Unit, USDA-ARS, Oxford, MS, USA
| | - David E Wedge
- United States Department of Agriculture, Natural Products Utilization Research Unit, USDA-ARS, Oxford, MS, USA
| | - Mariana C Ferreira
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marco Aurélio Soares
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Melissa R Jacob
- National Center for Natural Products Research, The University of Mississippi, Oxford, MS, USA
| | - Fabio S Oliveira
- Departamento de Geografia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Douglas Galante
- Laboratório Nacional de Luz Síncrotron (LNLS), Centro Nacional de Pesquisa em Energia e Materiais, Campinas, SP, Brazil
| | - Fabio Rodrigues
- Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Tânia M A Alves
- Centro de Pesquisas René Rachou, FIOCRUZ-MG, Belo Horizonte, MG, Brazil
| | - Carlos L Zani
- Centro de Pesquisas René Rachou, FIOCRUZ-MG, Belo Horizonte, MG, Brazil
| | | | - Silvane Murta
- Centro de Pesquisas René Rachou, FIOCRUZ-MG, Belo Horizonte, MG, Brazil
| | - Alvaro J Romanha
- Centro de Pesquisas René Rachou, FIOCRUZ-MG, Belo Horizonte, MG, Brazil.,Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Emerson C Barbosa
- Centro de Pesquisas René Rachou, FIOCRUZ-MG, Belo Horizonte, MG, Brazil
| | - Erna G Kroon
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Benito Gomez-Silva
- Biomedical Department and Centre for Biotechnology and Bioengineering (CeBiB), Universidad de Antofagasta, Antofagasta, Chile
| | - Alexandra Galetovic
- Biomedical Department and Centre for Biotechnology and Bioengineering (CeBiB), Universidad de Antofagasta, Antofagasta, Chile
| | - Carlos A Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luiz H Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| |
Collapse
|
40
|
|
41
|
Godinho VM, Gonçalves VN, Santiago IF, Figueredo HM, Vitoreli GA, Schaefer CEGR, Barbosa EC, Oliveira JG, Alves TMA, Zani CL, Junior PAS, Murta SMF, Romanha AJ, Kroon EG, Cantrell CL, Wedge DE, Duke SO, Ali A, Rosa CA, Rosa LH. Diversity and bioprospection of fungal community present in oligotrophic soil of continental Antarctica. Extremophiles 2015; 19:585-96. [PMID: 25809294 DOI: 10.1007/s00792-015-0741-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 02/16/2015] [Indexed: 11/24/2022]
Abstract
We surveyed the diversity and capability of producing bioactive compounds from a cultivable fungal community isolated from oligotrophic soil of continental Antarctica. A total of 115 fungal isolates were obtained and identified in 11 taxa of Aspergillus, Debaryomyces, Cladosporium, Pseudogymnoascus, Penicillium and Hypocreales. The fungal community showed low diversity and richness, and high dominance indices. The extracts of Aspergillus sydowii, Penicillium allii-sativi, Penicillium brevicompactum, Penicillium chrysogenum and Penicillium rubens possess antiviral, antibacterial, antifungal, antitumoral, herbicidal and antiprotozoal activities. Bioactive extracts were examined using (1)H NMR spectroscopy and detected the presence of secondary metabolites with chemical shifts. Our results show that the fungi present in cold-oligotrophic soil from Antarctica included few dominant species, which may have important implications for understanding eukaryotic survival in cold-arid oligotrophic soils. We hypothesize that detailed further investigations may provide a greater understanding of the evolution of Antarctic fungi and their relationships with other organisms described in that region. Additionally, different wild pristine bioactive fungal isolates found in continental Antarctic soil may represent a unique source to discover prototype molecules for use in drug and biopesticide discovery studies.
Collapse
Affiliation(s)
- Valéria M Godinho
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, CEP 31270-901, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Ferreira MC, Vieira MDLA, Zani CL, Alves TMDA, Junior PAS, Murta SM, Romanha AJ, Gil LHVG, Carvalho AGDO, Zilli JE, Vital MJS, Rosa CA, Rosa LH. Molecular phylogeny, diversity, symbiosis and discover of bioactive compounds of endophytic fungi associated with the medicinal Amazonian plant Carapa guianensis Aublet ( Meliaceae ). BIOCHEM SYST ECOL 2015. [DOI: 10.1016/j.bse.2014.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
43
|
Rodrigues de Carvalho C, Vieira MDLA, Cantrell CL, Wedge DE, Alves TM, Zani CL, Pimenta RS, Sales Junior PA, Murta SM, Romanha AJ, Rosa CA, Rosa LH. Biological activities of ophiobolin K and 6-epi-ophiobolin K produced by the endophytic fungusAspergillus calidoustus. Nat Prod Res 2015; 30:478-81. [DOI: 10.1080/14786419.2015.1022777] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
44
|
Silva-Hughes AF, Wedge DE, Cantrell CL, Carvalho CR, Pan Z, Moraes RM, Madoxx VL, Rosa LH. Diversity and antifungal activity of the endophytic fungi associated with the native medicinal cactus Opuntia humifusa (Cactaceae) from the United States. Microbiol Res 2015; 175:67-77. [PMID: 25851725 DOI: 10.1016/j.micres.2015.03.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 03/08/2015] [Accepted: 03/11/2015] [Indexed: 11/24/2022]
Abstract
The endophytic fungal community associated with the native cactus Opuntia humifusa in the United States was investigated and its potential for providing antifungal compounds. A hundred-eight endophytic fungal isolates were obtained and identified by molecular methods into 17 different taxa of the genera Alternaria, Aureobasidium, Biscogniauxia, Cladosporium, Cryptococcus, Curvularia, Diaporthe, Epicoccum, Paraconiothyrium, Pestalotiopsis and Phoma. The most frequent species associated with O. humifusa were Alternaria sp. 3, Aureobasidium pullulans and Diaporthe sp. The fungal community of O. humifusa had a high richness and diversity; additionally, the species richness obtained indicates that the sample effort was enough to recover the diversity pattern obtained. Six extracts of endophytes showed antifungal properties and (1)H NMR analyses of the extracts of Alternaria sp. 5 Ohu 8B2, Alternaria sp. 3 Ohu 30A, Cladosporium funiculosum Ohu 17C1 and Paraconiothyrium sp. Ohu 17A indicated the presence of functional groups associated with unsaturated fatty-acid olefinic protons and fatty acid methylene and methyl protons. GC-FID analysis of these extracts confirmed the presence of a mixture of different fatty acids. The (1)H NMR analyses of Biscogniauxia mediterranea Ohu 19B extracts showed the presence of aromatic compounds. From the extract of B. mediterranea we isolated the compound 5-methylmellein that displayed moderate antifungal activity against the phytopathogenic fungi Phomopsis obscurans. Our results suggest that native medicinal cacti of the United States can live symbiotically with rich and diverse endophytic communities and may be a source of bioactive molecules, including those able to inhibit or control plant disease pathogens.
Collapse
Affiliation(s)
- Alice F Silva-Hughes
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - David E Wedge
- Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, MS, USA.
| | - Charles L Cantrell
- Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, MS, USA
| | - Camila R Carvalho
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Zhiqiang Pan
- Natural Products Utilization Research Unit, Agricultural Research Service, United States Department of Agriculture, University, MS, USA
| | - Rita M Moraes
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA; Center for Water and Wetland Resources, University of Mississippi, Abbeville, MS, USA
| | - Victor L Madoxx
- Geosystems Research Institute, Mississippi State University, MS, USA
| | - Luiz H Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| |
Collapse
|
45
|
Antibacterial, antifungal and antiprotozoal activities of fungal communities present in different substrates from Antarctica. Polar Biol 2015. [DOI: 10.1007/s00300-015-1672-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
46
|
Pereira CB, de Oliveira DM, Hughes AF, Kohlhoff M, LA Vieira M, Martins Vaz AB, Ferreira MC, Carvalho CR, Rosa LH, Rosa CA, Alves TM, Zani CL, Johann S, Cota BB. Endophytic fungal compounds active against Cryptococcus neoformans and C. gattii. J Antibiot (Tokyo) 2015; 68:436-44. [PMID: 25712396 DOI: 10.1038/ja.2015.11] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 12/16/2014] [Accepted: 01/19/2015] [Indexed: 12/17/2022]
Abstract
Infections with Cryptococcus are invasive mycoses associated with significant morbidity and mortality, mainly in immunosuppressed patients. Several drugs have been introduced to combat these opportunistic infections. However, resistance of this organism to antifungal drugs has increased, causing difficulties in the treatment. The goal of this work was to evaluate the antifungal activity of ethanol extracts from endophytic fungi isolated from plants collected from different Brazilian ecosystems and to perform the fractionation of the most promising extract. Four-hundred fungal extracts were investigated by microdilution broth assays against Cryptococcus neoformans and Cryptococcus gattii at a concentration of 500 μg ml(-1). Among them, the extract of Mycosphaerella sp. UFMGCB 2032, an endophytic fungus isolated from the plant Eugenia bimarginata DC. (Myrtaceae) exhibited outstanding antifungal activity against C. neoformans and C. gattii, with MIC values of 31.2 μg ml(-1) and 7.8 μg ml(-1), respectively. The fractionation of this extract using liquid-liquid partitioning and semi-preparative HPLC afforded two eicosanoic acids with antifungal activity, compound 1, (2S,3R,4R)-(E)-2-amino-3,4-dihydroxy-2-(hydroxymethyl)-14-oxoeicos-6,12-dienoic acid with MIC values ranging from 1.3-2.50 μg ml(-1), and compound 2, known as myriocin, with MIC values of 0.5 μg ml(-1) against C. neoformans and C. gattii. These compounds are reported for the first time in the Mycosphaerella genus.
Collapse
Affiliation(s)
- Cristiane B Pereira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Djalma M de Oliveira
- Departamento de Química e Exatas, Universidade Estadual do Sudoeste da Bahia, Campus Universitário de Jequié, Jequié, Bahia, Brazil
| | - Alice Fs Hughes
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Markus Kohlhoff
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | - Mariana LA Vieira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Aline B Martins Vaz
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Mariana C Ferreira
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Camila R Carvalho
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luiz H Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carlos A Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Tânia Ma Alves
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | - Carlos L Zani
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| | - Susana Johann
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Betania B Cota
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brazil
| |
Collapse
|
47
|
Vieira MLA, Johann S, Hughes FM, Rosa CA, Rosa LH. The diversity and antimicrobial activity of endophytic fungi associated with medicinal plant Baccharis trimera (Asteraceae) from the Brazilian savannah. Can J Microbiol 2015; 60:847-56. [PMID: 25403761 DOI: 10.1139/cjm-2014-0449] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The fungal endophyte community associated with Baccharis trimera, a Brazilian medicinal plant, was characterized and screened for its ability to present antimicrobial activity. By using molecular methods, we identified and classified the endophytic fungi obtained into 25 different taxa from the phyla Ascomycota and Basidiomycota. The most abundant species were closely related to Diaporthe phaseolorum, Pestalotiopsis sp. 1, and Preussia pseudominima. The differences observed in endophytic assemblages from different B. trimera specimens might be associated with their crude extract activities. Plants that had higher α-biodiversity were also those that contributed more to the regional (γ) diversity. All fungal isolates were cultured and their crude extracts screened to examine the antimicrobial activities. Twenty-three extracts (12.8%) displayed antimicrobial activities against at least one target microorganism. Among these extracts, those obtained from Epicoccum sp., Pestalotiopsis sp. 1, Cochliobolus lunatus, and Nigrospora sp. presented the best minimum inhibitory concentration values. Our results show that the endophytic fungal community associated with the medicinal plant B. trimera included few dominant bioactive taxa, which may represent sources of compounds with antifungal activity. Additionally, the discovery of these bioactive fungi in association with B. trimera suggests that Brazilian plants used as folk medicine may shelter a rich fungal diversity as well as taxa able to produce bioactive metabolites with antimicrobial activities.
Collapse
Affiliation(s)
- Mariana L A Vieira
- a Department of Microbiology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, MG, P.O. Box 486, CEP 31270-901, Brazil
| | | | | | | | | |
Collapse
|
48
|
Raja HA, Kaur A, El-Elimat T, Figueroa M, Kumar R, Deep G, Agarwal R, Faeth SH, Cech NB, Oberlies NH. Phylogenetic and chemical diversity of fungal endophytes isolated from Silybum marianum (L) Gaertn. (milk thistle). Mycology 2015; 6:8-27. [PMID: 26000195 PMCID: PMC4409047 DOI: 10.1080/21501203.2015.1009186] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 01/13/2015] [Indexed: 01/30/2023] Open
Abstract
Use of the herb milk thistle (Silybum marianum) is widespread, and its chemistry has been studied for over 50 years. However, milk thistle endophytes have not been studied previously for their fungal and chemical diversity. We examined the fungal endophytes inhabiting this medicinal herb to determine: (1) species composition and phylogenetic diversity of fungal endophytes; (2) chemical diversity of secondary metabolites produced by these organisms; and (3) cytotoxicity of the pure compounds against the human prostate carcinoma (PC-3) cell line. Forty-one fungal isolates were identified from milk thistle comprising 25 operational taxonomic units based on BLAST search via GenBank using published authentic sequences from nuclear ribosomal internal transcribed spacer sequence data. Maximum likelihood analyses of partial 28S rRNA gene showed that these endophytes had phylogenetic affinities to four major classes of Ascomycota, the Dothideomycetes, Sordariomycetes, Eurotiomycetes, and Leotiomycetes. Chemical studies of solid-substrate fermentation cultures led to the isolation of four new natural products. In addition, 58 known secondary metabolites, representing diverse biosynthetic classes, were isolated and characterized using a suite of nuclear magnetic resonance and mass spectrometry techniques. Selected pure compounds were tested against the PC-3 cell line, where six compounds displayed cytotoxicity.
Collapse
Affiliation(s)
- Huzefa A. Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| | - Amninder Kaur
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| | - Tamam El-Elimat
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| | - Mario Figueroa
- Facultad de Química, Universidad Nacional Autónoma de México, Mexico, DF04510, Mexico
| | - Rahul Kumar
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO80045, USA
| | - Gagan Deep
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO80045, USA
| | - Rajesh Agarwal
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver, Aurora, CO80045, USA
| | - Stanley H. Faeth
- Department of Biology, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| | - Nadja B. Cech
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC27402, USA
| |
Collapse
|
49
|
Oliveira GTD, Ferreira JMS, Rosa LH, Siqueira EPD, Johann S, Lima LARDS. In vitro antifungal activities of leaf extracts of Lippia alba (Verbenaceae) against clinically important yeast species. Rev Soc Bras Med Trop 2014; 47:247-50. [PMID: 24861304 DOI: 10.1590/0037-8682-0008-2013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 08/12/2013] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION There are few studies reporting the antifungal activities of Lippia alba extracts. METHODS A broth microdilution assay was used to evaluate the antifungal effects of Lippia alba extracts against seven yeast species of Candida and Cryptococcus. The butanol fraction was investigated by gas chromatography-mass spectrometry. RESULTS The butanol fraction showed the highest activity against Candida glabrata. The fraction also acted synergistically with itraconazole and fluconazole against C. glabrata. The dominant compounds in the butanol fraction were 2,2,5-trimethyl-3,4-hexanedione, 3,5-dimethyl-4-octanone and hexadecane. CONCLUSIONS The butanol fraction may be a good candidate in the search for new drugs from natural products with antifungal activity.
Collapse
Affiliation(s)
| | | | - Luiz Henrique Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BRAZIL
| | - Ezequias Pessoa de Siqueira
- Laboratório de Química de Produtos Naturais, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, BRAZIL
| | - Susana Johann
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BRAZIL
| | | |
Collapse
|
50
|
Furbino LE, Godinho VM, Santiago IF, Pellizari FM, Alves TMA, Zani CL, Junior PAS, Romanha AJ, Carvalho AGO, Gil LHVG, Rosa CA, Minnis AM, Rosa LH. Diversity patterns, ecology and biological activities of fungal communities associated with the endemic macroalgae across the Antarctic peninsula. MICROBIAL ECOLOGY 2014; 67:775-87. [PMID: 24509705 DOI: 10.1007/s00248-014-0374-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 01/20/2014] [Indexed: 05/22/2023]
Abstract
We surveyed diversity patterns and engaged in bioprospecting for bioactive compounds of fungi associated with the endemic macroalgae, Monostroma hariotii and Pyropia endiviifolia, in Antarctica. A total of 239 fungal isolates were obtained, which were identified to represent 48 taxa and 18 genera using molecular methods. The fungal communities consisted of endemic, indigenous and cold-adapted cosmopolitan taxa, which displayed high diversity and richness, but low dominance indices. The extracts of endemic and cold-adapted fungi displayed biological activities and may represent sources of promising prototype molecules to develop drugs. Our results suggest that macroalgae along the marine Antarctic Peninsula provide additional niches where fungal taxa can survive and coexist with their host in the extreme conditions. We hypothesise that the dynamics of richness and dominance among endemic, indigenous and cold-adapted cosmopolitan fungal taxa might be used to understand and model the influence of climate change on the maritime Antarctic mycota.
Collapse
Affiliation(s)
- Laura E Furbino
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, P. O. Box 486, CEP 31270-901, Belo Horizonte, MG, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|