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Bashiri S, Abdollahzadeh J. Taxonomy and pathogenicity of fungi associated with oak decline in northern and central Zagros forests of Iran with emphasis on coelomycetous species. FRONTIERS IN PLANT SCIENCE 2024; 15:1377441. [PMID: 38708399 PMCID: PMC11067508 DOI: 10.3389/fpls.2024.1377441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 03/18/2024] [Indexed: 05/07/2024]
Abstract
Oak decline is a complex disorder that seriously threatens the survival of Zagros forests. In an extensive study on taxonomy and pathology of fungi associated with oak decline in the central and northern part of Zagros forests, 462 fungal isolates were obtained from oak trees showing canker, gummosis, dieback, defoliation, and partial or total death symptoms. Based on inter-simple sequence repeat (ISSR) fingerprinting patterns, morphological characteristics, and sequences of ribosomal DNA (28S rDNA and ITS) and protein coding loci (acl1, act1, caM, tef-1α, rpb1, rpb2, and tub2), 24 fungal species corresponding to 19 genera were characterized. Forty percent of the isolates were placed in eight coelomycetous species from seven genera, namely, Alloeutypa, Botryosphaeria, Cytospora, Didymella, Gnomoniopsis, Kalmusia, and Neoscytalidium. Of these, four species are new to science, which are introduced here as taxonomic novelties: Alloeutypa iranensis sp. nov., Cytospora hedjaroudei sp. nov., Cytospora zagrosensis sp. nov., and Gnomoniopsis quercicola sp. nov. According to pathogenicity trials on leaves and stems of 2-year-old Persian oak (Quercus brantii) seedlings, Alternaria spp. (A. alternata, A. atra, and A. contlous), Chaetomium globosum, and Parachaetomium perlucidum were recognized as nonpathogenic. All coelomycetous species were determined as pathogenic in both pathogenicity trials on leaves and seedling stems, of which Gnomoniopsis quercicola sp. nov., Botryosphaeria dothidea, and Neoscytalidium dimidiatum were recognized as the most virulent species followed by Biscogniauxia rosacearum.
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Affiliation(s)
| | - Jafar Abdollahzadeh
- Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
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Zhao C, Onyino J, Gao X. Current Advances in the Functional Diversity and Mechanisms Underlying Endophyte-Plant Interactions. Microorganisms 2024; 12:779. [PMID: 38674723 PMCID: PMC11052469 DOI: 10.3390/microorganisms12040779] [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: 03/02/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Plant phenotype is a complex entity largely controlled by the genotype and various environmental factors. Importantly, co-evolution has allowed plants to coexist with the biotic factors in their surroundings. Recently, plant endophytes as an external plant phenotype, forming part of the complex plethora of the plant microbial assemblage, have gained immense attention from plant scientists. Functionally, endophytes impact the plant in many ways, including increasing nutrient availability, enhancing the ability of plants to cope with both abiotic and biotic stress, and enhancing the accumulation of important plant secondary metabolites. The current state of research has been devoted to evaluating the phenotypic impacts of endophytes on host plants, including their direct influence on plant metabolite accumulation and stress response. However, there is a knowledge gap in how genetic factors influence the interaction of endophytes with host plants, pathogens, and other plant microbial communities, eventually controlling the extended microbial plant phenotype. This review will summarize how host genetic factors can impact the abundance and functional diversity of the endophytic microbial community, how endophytes influence host gene expression, and the host-endophyte-pathogen disease triangle. This information will provide novel insights into how breeders could specifically target the plant-endophyte extended phenotype for crop improvement.
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Affiliation(s)
- Caihong Zhao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China; (C.Z.); (J.O.)
- Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry, Nanjing 210095, China
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Johnmark Onyino
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China; (C.Z.); (J.O.)
- Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry, Nanjing 210095, China
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiquan Gao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China; (C.Z.); (J.O.)
- Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry, Nanjing 210095, China
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
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Marčiulynas A, Menkis A. Long-term Dynamics of Fungal Communities Inhabiting Decaying Stumps of Quercus robur. MICROBIAL ECOLOGY 2024; 87:27. [PMID: 38175304 DOI: 10.1007/s00248-023-02334-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
We studied the diversity, composition, and long-term dynamics of wood-inhabiting fungi in Quercus robur stumps left after commercial tree harvesting in Lithuania. Sampling of wood was carried out at three sites and from stumps, which were 10-, 20-, 30-, 40-, and 50-year-old. DNA was isolated from wood samples and fungal communities analyzed using high-throughput sequencing. Results showed that stump age had a limited effect on fungal diversity. The development of fungal communities in oak stums was found to be a slow process as fungal communities remained similar for decades, while larger changes were only detected in older stumps. The most common fungi were Eupezizella sp. (18.4%), Hyphodontia pallidula (12.9%), Mycena galericulata (8.3%), and Lenzites betulinus (7.1%). Fistulina hepatica, which is a red-listed wood-decay oak fungus, was also detected at a low relative abundance in stump wood. In the shortage of suitable substrate, oak stumps may provide habitats for long-term survival of different fungal species, including red-listed and oak-related fungi.
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Affiliation(s)
- Adas Marčiulynas
- Institute of Forestry, Lithuanian Research Centre for Agriculture and Forestry, Liepų Str. 1, Girionys, 53101, Kaunas District, Lithuania.
| | - Audrius Menkis
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7026, SE-75007, Uppsala, Sweden
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Bilous S, Likhanov A, Boroday V, Marchuk Y, Zelena L, Subin O, Bilous A. Antifungal Activity and Effect of Plant-Associated Bacteria on Phenolic Synthesis of Quercus robur L. PLANTS (BASEL, SWITZERLAND) 2023; 12:1352. [PMID: 36987039 PMCID: PMC10059881 DOI: 10.3390/plants12061352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/09/2023] [Accepted: 03/10/2023] [Indexed: 06/19/2023]
Abstract
Europe's forests, particularly in Ukraine, are highly vulnerable to climate change. The maintenance and improvement of forest health are high-priority issues, and various stakeholders have shown an interest in understanding and utilizing ecological interactions between trees and their associated microorganisms. Endophyte microbes can influence the health of trees either by directly interacting with the damaging agents or modulating host responses to infection. In the framework of this work, ten morphotypes of endophytic bacteria from the tissues of unripe acorns of Quercus robur L. were isolated. Based on the results of the sequenced 16S rRNA genes, four species of endophytic bacteria were identified: Bacillus amyloliquefaciens, Bacillus subtilis, Delftia acidovorans, and Lelliottia amnigena. Determining the activity of pectolytic enzymes showed that the isolates B. subtilis and B. amyloliquefaciens could not cause maceration of plant tissues. Screening for these isolates revealed their fungistatic effect against phytopathogenic micromycetes, namely Fusarium tricinctum, Botrytis cinerea, and Sclerotinia sclerotiorum. Inoculation of B. subtilis, B. amyloliquefaciens, and their complex in oak leaves, in contrast to phytopathogenic bacteria, contributed to the complete restoration of the epidermis at the sites of damage. The phytopathogenic bacteria Pectobacterium and Pseudomonas caused a 2.0 and 2.2 times increase in polyphenol concentration in the plants, respectively, while the ratio of antioxidant activity to total phenolic content decreased. Inoculation of Bacillus amyloliquefaciens and Bacillus subtilis isolates into oak leaf tissue were accompanied by a decrease in the total pool of phenolic compounds. The ratio of antioxidant activity to total phenolic content increased. This indicates a qualitative improvement in the overall balance of the oak leaf antioxidant system induced by potential PGPB. Thus, endophytic bacteria of the genus Bacillus isolated from the internal tissues of unripe oak acorns have the ability of growth biocontrol and spread of phytopathogens, indicating their promise for use as biopesticides.
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Affiliation(s)
- Svitlana Bilous
- Education and Research Institute of Forestry and Landscape-Park Management, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine (Y.M.)
- Institute for Evolutionary Ecology NAS of Ukraine, 37 Lebedeva Str., 03143 Kiev, Ukraine
- Forestry Department, Weihenstephan-Triesdorf University of Applied Sciences, Germany, Hans-Carl-von-Carlowitz-Platz 3, 85354 Freising, Germany
| | - Artur Likhanov
- Education and Research Institute of Forestry and Landscape-Park Management, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine (Y.M.)
- Institute for Evolutionary Ecology NAS of Ukraine, 37 Lebedeva Str., 03143 Kiev, Ukraine
| | - Vira Boroday
- Education and Research Institute of Forestry and Landscape-Park Management, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine (Y.M.)
| | - Yurii Marchuk
- Education and Research Institute of Forestry and Landscape-Park Management, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine (Y.M.)
| | - Liubov Zelena
- Danylo Zabolotny Institute of Microbiology and Virology National Academy of Sciences of Ukraine, 154 Zabolotnogo Str., 03143 Kyiv, Ukraine
| | - Oleksandr Subin
- State Enterprise “State Centre of Agricultural Products Certification and Examination”, Janusha Korchaka Str. 9/12, 03143 Kyiv, Ukraine
| | - Andrii Bilous
- Education and Research Institute of Forestry and Landscape-Park Management, National University of Life and Environmental Sciences of Ukraine, 03041 Kyiv, Ukraine (Y.M.)
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Bhunjun CS, Phukhamsakda C, Hyde KD, McKenzie EHC, Saxena RK, Li Q. Do all fungi have ancestors with endophytic lifestyles? FUNGAL DIVERS 2023. [DOI: 10.1007/s13225-023-00516-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Bracalini M, Benigno A, Aglietti C, Panzavolta T, Moricca S. Thousand Cankers Disease in Walnut Trees in Europe: Current Status and Management. Pathogens 2023; 12:pathogens12020164. [PMID: 36839436 PMCID: PMC9959596 DOI: 10.3390/pathogens12020164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/28/2022] [Accepted: 01/17/2023] [Indexed: 01/22/2023] Open
Abstract
Thousand cankers disease (TCD) is a new deadly disease in walnut trees (Juglans spp.), which is plaguing commercial plantations, natural groves, and ornamental black walnut trees (Juglans nigra) in their native and invasion areas in the US and, more recently, in artificial plantations and amenity trees in the newly-invaded areas in Europe (Italy). This insect/fungus complex arises from the intense trophic activity of the bark beetle vector Pityophthorus juglandis in the phloem of Juglans spp. and the subsequent development of multiple Geosmithia morbida cankers around beetles' entry/exit holes. After an analysis of the main biological and ecological traits of both members of this insect/fungus complex, this review explores the options available for TCD prevention and management. Special focus is given to those diagnostic tools developed for disease detection, surveillance, and monitoring, as well as to existing phytosanitary regulations, protocols, and measures that comply with TCD eradication and containment. Only integrated disease management can effectively curtail the pervasive spread of TCD, thus limiting the damage to natural ecosystems, plantations, and ornamental walnuts.
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Hagh-Doust N, Färkkilä SM, Hosseyni Moghaddam MS, Tedersoo L. Symbiotic fungi as biotechnological tools: Methodological challenges and relative benefits in agriculture and forestry. FUNGAL BIOL REV 2022. [DOI: 10.1016/j.fbr.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Protective Effects of Filtrates and Extracts from Fungal Endophytes on Phytophthora cinnamomi in Lupinus luteus. PLANTS 2022; 11:plants11111455. [PMID: 35684227 PMCID: PMC9182999 DOI: 10.3390/plants11111455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/24/2022] [Accepted: 05/26/2022] [Indexed: 11/17/2022]
Abstract
Fungal endophytes have been found to protect their hosts against multiple fungal pathogens. Frequently, the secondary metabolites produced by the endophyte are responsible for antifungal activity. To develop new bio-products that are more environmentally friendly than synthetic pesticides against Phytophthora cinnamomi, a serious pathogen of many plant species, the antifungal activity of filtrates or extracts from four endophytes was evaluated in different in vitro tests and in plants of Lupinus luteus. In the dual culture assays, the filtrate of one of the endophytes (Drechslera biseptata) completely inhibited the mycelial growth of the pathogen. Moreover, it showed a very low minimal inhibitory concentration (MIC). Epicoccum nigrum, an endophyte that also showed high inhibitory activity and a low MIC against P. cinnamomi in those two experiments, provided a clear growth promotion effect when the extracts were applied to L. luteus seedlings. The extract of Fusarium avenaceum also manifested such a promotion effect and was the most effective in reducing the disease severity caused by the pathogen in lupine plants (73% reduction). Results demonstrated the inhibitory activity of the filtrates or extracts of these endophytes against P. cinnamomi. A better insight into the mechanisms involved may be gained by isolating and identifying the metabolites conferring this inhibitory effect against this oomycete pathogen.
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Verma A, Gupta P, Rai N, Tiwari RK, Kumar A, Salvi P, Kamble SC, Singh SK, Gautam V. Assessment of Biological Activities of Fungal Endophytes Derived Bioactive Compounds Isolated from Amoora rohituka. J Fungi (Basel) 2022; 8:jof8030285. [PMID: 35330287 PMCID: PMC8952687 DOI: 10.3390/jof8030285] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 12/11/2022] Open
Abstract
Fungal endophytes have remarkable potential to produce bioactive compounds with numerous pharmacological significance that are used in various disease management and human welfare. In the current study, a total of eight fungal endophytes were isolated from the leaf tissue of Amoora rohituka, and out of which ethyl acetate (EA) extract of Penicillium oxalicum was found to exhibit potential antioxidant activity against DPPH, nitric oxide, superoxide anion and hydroxyl free radicals with EC50 values of 178.30 ± 1.446, 75.79 ± 0.692, 169.28 ± 0.402 and 126.12 ± 0.636 µg/mL, respectively. The significant antioxidant activity of EA extract of P. oxalicum is validated through highest phenolic and flavonoid content, and the presence of unique bioactive components observed through high-performance thin layer chromatography (HPTLC) fingerprinting. Moreover, EA extract of P. oxalicum also displayed substantial anti-proliferative activity with IC50 values of 56.81 ± 0.617, 37.24 ± 1.26 and 260.627 ± 5.415 µg/mL against three cancer cells HuT-78, MDA-MB-231 and MCF-7, respectively. Furthermore, comparative HPTLC fingerprint analysis and antioxidant activity of P. oxalicum revealed that fungal endophyte P. oxalicum produces bioactive compounds in a host-dependent manner. Therefore, the present study signifies that fungal endophyte P. oxalicum associated with the leaf of A. rohituka could be a potential source of bioactive compounds with antioxidant and anticancer activity.
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Affiliation(s)
- Ashish Verma
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India; (A.V.); (P.G.); (N.R.); (S.K.S.)
| | - Priyamvada Gupta
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India; (A.V.); (P.G.); (N.R.); (S.K.S.)
| | - Nilesh Rai
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India; (A.V.); (P.G.); (N.R.); (S.K.S.)
| | - Rajan Kumar Tiwari
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; (R.K.T.); (A.K.)
| | - Ajay Kumar
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi 221005, India; (R.K.T.); (A.K.)
| | - Prafull Salvi
- Department of Agriculture Biotechnology, National Agri-Food Biotechnology Institute, Sahibzada Ajit Singh Nagar 140306, India;
| | - Swapnil C. Kamble
- Department of Technology, Savitribai Phule Pune University, Pune 411007, India;
| | - Santosh Kumar Singh
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India; (A.V.); (P.G.); (N.R.); (S.K.S.)
| | - Vibhav Gautam
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India; (A.V.); (P.G.); (N.R.); (S.K.S.)
- Correspondence: ; Tel.: +91-88-6018-2113
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Rodrigo S, García-Latorre C, Santamaria O. Metabolites Produced by Fungi against Fungal Phytopathogens: Review, Implementation and Perspectives. PLANTS (BASEL, SWITZERLAND) 2021; 11:81. [PMID: 35009084 PMCID: PMC8747711 DOI: 10.3390/plants11010081] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 01/06/2023]
Abstract
Many fungi, especially endophytes, have been found to produce multiple benefits in their plant hosts, with many of these benefits associated with the protection of plants against fungal diseases. This fact could be used in the development of new bio-products that could gradually reduce the need for chemical fungicides, which have been associated with multiple health and environmental problems. However, the utilization of the living organism may present several issues, such as an inconsistency in the results obtained and more complicated management and application, as fungal species are highly influenced by environmental conditions, the type of relationship with the plant host and interaction with other microorganisms. These issues could be addressed by using the bioactive compounds produced by the fungus, in cases where they were responsible for positive effects, instead of the living organism. Multiple bioactive compounds produced by fungal species, especially endophytes, with antifungal properties have been previously reported in the literature. However, despite the large amount of these metabolites and their potential, extensive in-field application on a large scale has not yet been implemented. In the present review, the main aspects explaining this limited implementation are analyzed, and the present and future perspectives for its development are discussed.
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Affiliation(s)
- Sara Rodrigo
- Department of Agronomy and Forest Environment Engineering, University of Extremadura, Avda, Adolfo Suárez s/n, 06007 Badajoz, Spain; (S.R.); (C.G.-L.)
| | - Carlos García-Latorre
- Department of Agronomy and Forest Environment Engineering, University of Extremadura, Avda, Adolfo Suárez s/n, 06007 Badajoz, Spain; (S.R.); (C.G.-L.)
| | - Oscar Santamaria
- Department of Construction and Agronomy, University of Salamanca, Avda, Cardenal Cisneros 34, 49029 Zamora, Spain
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Olivieri L, Saville RJ, Gange AC, Xu X. Apple endophyte community in relation to location, scion and rootstock genotypes and susceptibility to European canker. FEMS Microbiol Ecol 2021; 97:fiab131. [PMID: 34601593 PMCID: PMC8497447 DOI: 10.1093/femsec/fiab131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 09/24/2021] [Indexed: 12/30/2022] Open
Abstract
European apple canker, caused by Neonectria ditissima, is a severe disease of apple. Achieving effective control is difficult with the currently available pesticides. Specific apple endophytes associated with cultivars may partially contribute to the cultivar response to the pathogen and thus could be used for disease management. We sought to determine whether the overall endophyte community differed among cultivars differing in their susceptibility to N. ditissima and to identify specific microbial groups associated with the susceptibility. Using Illumina MiSeq meta-barcoding, we profiled apple tree endophytes in 16 scion-rootstock combinations at two locations and quantified the relative contribution of scion, rootstock and location to the observed variability in the endophyte communities. Endophyte diversity was primarily affected by the orchard location (accounting for 29.4% and 85.9% of the total variation in the PC1 for bacteria and fungi, respectively), followed by the scion genotype (24.3% and 19.5% of PC2), whereas rootstock effects were small (<3% of PC1 and PC2). There were significant differences in the endophyte community between canker-resistant and -susceptible cultivars. Several bacterial and fungal endophyte groups had different relative abundance between susceptible and resistant cultivars. These endophyte groups included putative pathogen antagonists as well as plant pathogens. Their possible ecological roles in the N. ditissima pathosystem are discussed.
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Affiliation(s)
- Leone Olivieri
- NIAB EMR, New Road, East Malling, Kent ME19 6BJ, UK
- Department of Biological Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK
| | - Robert J Saville
- NIAB EMR, New Road, East Malling, Kent ME19 6BJ, UK
- Agriculture & Horticulture Development Board, Stoneleigh Park, Kenilworth, Warwickshire CV8 2TL, UK
| | - Alan C Gange
- Department of Biological Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK
| | - Xiangming Xu
- NIAB EMR, New Road, East Malling, Kent ME19 6BJ, UK
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Huang X, Ren J, Li P, Feng S, Dong P, Ren M. Potential of microbial endophytes to enhance the resistance to postharvest diseases of fruit and vegetables. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:1744-1757. [PMID: 32974893 DOI: 10.1002/jsfa.10829] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/17/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Food loss of fruit and vegetables caused by postharvest diseases is a major issue worldwide. The method used to prevent and control postharvest diseases is usually to use chemical fungicides, but long-term and large-scale use will make the pathogens resistant and potentially have a negative impact on human health and the ecological environment. Therefore, finding a safe and effective biological control method instead of chemical control is a hot research topic in recent years. Endophytes, colonizing plants asymptomatically, can promote the growth of the hosts and enhance their resistance. The use of endophytes as biological control agents for postharvest diseases of fruit and vegetables has attracted increasing attention in the last 20 years. Compared with chemical control, endophytes have the advantages of being more environmentally friendly, sustainable, and safer. However, there are relatively few relevant studies, so herein we summarize the available literature. This review focuses mainly on the recent progress of using endophytes to enhance the resistance of postharvest fruit and vegetables to diseases, with the emphasis on the possible mechanisms and the potential applications. Furthermore, this article suggests future areas for study using antagonistic endophytes to prevent and control fruit and vegetable postharvest diseases: (i) screening more potential broad-spectrum anti-pathogen endophytes and their metabolic active substances by the method of macrogenomics; (ii) elucidating the underlining molecular mechanism among endophytes, harvested vegetables and fruit, pathogens, and microbial communities; (iii) needing more application research to overcome the difficulties of commercialization practice. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Xiaoqing Huang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Jie Ren
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Peihua Li
- College of Agronomy, Xichang University, Xichang, China
| | - Shun Feng
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Pan Dong
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Maozhi Ren
- School of Life Sciences, Chongqing University, Chongqing, China
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
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Dang H, Zhang T, Wang Z, Li G, Zhao W, Lv X, Zhuang L. Differences in the endophytic fungal community and effective ingredients in root of three Glycyrrhiza species in Xinjiang, China. PeerJ 2021; 9:e11047. [PMID: 33854843 PMCID: PMC7953873 DOI: 10.7717/peerj.11047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/10/2021] [Indexed: 12/15/2022] Open
Abstract
Background Endophytic fungi influence the quality and quantity of the medicinal plant’s bioactive compounds through specific fungus-host interactions. Nevertheless, due to the paucity of information, the composition of endophytic fungal communities and the mechanism by which effective ingredients regulate endophytic fungal communities in roots remains unclear. Methods In this study, we collected root and soil samples (depth range: 0–20, 20–40, and 40–60 cm) of three Glycyrrhiza species (Glycyrrhiza uralensis, Glycyrrhiza inflata, and Glycyrrhiza glabra). Glycyrrhizic acid and liquiritin content were determined using high-performance liquid chromatography (HPLC), and total flavonoid content was determined using ultraviolet spectrophotometry. High-throughput sequencing technology was employed to explore the composition and diversity of the endophytic fungal community in different root segments of three Glycyrrhiza species. Furthermore, soil samples were subjected to physicochemical analyses. Results We observed that the liquiritin content was not affected by the root depth (0–20 cm, 20–40 cm, and 40–60 cm). Still, it was significantly affected by the Glycyrrhiza species (Glycyrrhiza uralensis, Glycyrrhiza inflata, Glycyrrhiza glabra) (P < 0.05). In Glycyrrhiza root, a total of eight phyla and 140 genera were annotated so far, out of which Ascomycota and Basidiomycota phyla, and the Fusarium, Paraphoma, and Helminthosporium genera were found to be significantly dominant. Spearman correlation analysis revealed that liquiritin content was accountable for the differences in the diversity of the endophytic fungal community. Furthermore, distance-based redundancy analysis (db-RDA) showed that physicochemical properties of the soil (available potassium and ammonium nitrogen) and the root factors (liquiritin and water content) were the main contributing factors for the variations in the overall structure of the endophytic fungal community. Our results showed that the effective ingredients of Glycyrrhiza root and physicochemical properties of the soil regulated the endophytic fungal community composition and medicinal licorice diversity.
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Affiliation(s)
- Hanli Dang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Tao Zhang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Zhongke Wang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Guifang Li
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Wenqin Zhao
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Xinhua Lv
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Li Zhuang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
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Cui L, Noushahi HA, Zhang Y, Liu J, Cosoveanu A, Liu Y, Yan L, Zhang J, Shu S. Endophytic Fungal Community of Huperzia serrata: Diversity and Relevance to the Production of Huperzine A by the Plant Host. Molecules 2021; 26:892. [PMID: 33567664 PMCID: PMC7914787 DOI: 10.3390/molecules26040892] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 11/16/2022] Open
Abstract
As the population ages globally, there seem to be more people with Alzheimer's disease. Unfortunately, there is currently no specific treatment for the disease. At present, Huperzine A (HupA) is one of the best drugs used for the treatment of Alzheimer's disease and has been used in clinical trials for several years in China. HupA was first separated from Huperzia serrata, a traditional medicinal herb that is used to cure fever, contusions, strains, hematuria, schizophrenia, and snakebite for several hundreds of years in China, and has been confirmed to have acetylcholinesterase inhibitory activity. With the very slow growth of H. serrata, resources are becoming too scarce to meet the need for clinical treatment. Some endophytic fungal strains that produce HupA were isolated from H. serrate in previous studies. In this article, the diversity of the endophytic fungal community within H. serrata was observed and the relevance to the production of HupA by the host plant was further analyzed. A total of 1167 strains were obtained from the leaves of H. serrata followed by the stems (1045) and roots (824). The richness as well as diversity of endophytic fungi within the leaf and stem were higher than in the root. The endophytic fungal community was similar within stems as well as in leaves at all taxonomic levels. The 11 genera (Derxomyces, Lophiostoma, Cyphellophora, Devriesia, Serendipita, Kurtzmanomyces, Mycosphaerella, Conoideocrella, Brevicellicium, Piskurozyma, and Trichomerium) were positively correlated with HupA content. The correlation index of Derxomyces with HupA contents displayed the highest value (CI = 0.92), whereas Trichomerium showed the lowest value (CI = 0.02). Through electrospray ionization mass spectrometry (ESI-MS), it was confirmed that the HS7-1 strain could produce HupA and the total alkaloid concentration was 3.7 ug/g. This study will enable us to screen and isolate the strain that can produce HupA and to figure out the correlation between endophytic fungal diversity with HupA content in different plant organs. This can provide new insights into the screening of strains that can produce HupA more effectively.
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Affiliation(s)
- Lingli Cui
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Hamza Armghan Noushahi
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Yipeng Zhang
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Jinxin Liu
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Andreea Cosoveanu
- Laboratory of Useful Organisms, Research—Development Institute for Plant Protection, Ion Ionescu de la Brad no. 8 Blvd., 013813 Bucharest, Romania;
| | - Ying Liu
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Ling Yan
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Jing Zhang
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
| | - Shaohua Shu
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (L.C.); (H.A.N.); (Y.Z.); (J.L.); (Y.L.); (L.Y.); (J.Z.)
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Vidal A, Parada R, Mendoza L, Cotoras M. Endophytic Fungi Isolated from Plants Growing in Central Andean Precordillera of Chile with Antifungal Activity against Botrytis cinerea. J Fungi (Basel) 2020; 6:jof6030149. [PMID: 32858807 PMCID: PMC7560031 DOI: 10.3390/jof6030149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 08/07/2020] [Accepted: 08/12/2020] [Indexed: 12/26/2022] Open
Abstract
Botrytis cinerea is an important phytopathogenic fungus affecting the fruit production around the world. This fungus is controlled mainly by using synthetic fungicides, but many resistant isolates have been selected by the indiscriminate use of fungicides. Endophytic fungi or secondary metabolites obtained from them become an alternative method of control for this fungus. The aim of this work was to identify endophytic fungi with antifungal activity against the plant pathogenic fungus B. cinerea isolated from plants from Central Andean Precordillera of Chile. Three endophytic fungi (Ac1, Lc1 and Ec1) with antifungal activity against B. cinerea were isolated from native and endemic plants growing in Central Andean Precordillera of Chile. The isolates Lc1 (isolated from Lithraea caustica) and Ac1 (isolated from Acacia caven) were identified as Alternaria spp. and the isolate Ec1 (isolated from Echinopsis chiloensis) was identified as Aureobasidium spp. The isolated endophytic fungi would inhibit B. cinerea through the secretion of diffusible and volatile compounds affecting the mycelial growth, conidia germination and interestingly, it was also shown that the volatile compounds produced by the three isolated endophytic fungi suppressed the sporulation of B. cinerea.
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Affiliation(s)
| | | | - Leonora Mendoza
- Correspondence: (L.M.); (M.C.); Tel.: +56-2718-1062 (L.M.); +56-2718-1094 (M.C.)
| | - Milena Cotoras
- Correspondence: (L.M.); (M.C.); Tel.: +56-2718-1062 (L.M.); +56-2718-1094 (M.C.)
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18
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Wu LS, Dong WG, Si JP, Liu JJ, Zhu YQ. Endophytic fungi, host genotype, and their interaction influence the growth and production of key chemical components of Dendrobium catenatum. Fungal Biol 2020; 124:864-876. [PMID: 32948274 DOI: 10.1016/j.funbio.2020.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 04/22/2020] [Accepted: 07/05/2020] [Indexed: 12/22/2022]
Abstract
To examine how host plant genotype, endophytic fungal species, and their interaction may affect growth and key chemical content and composition in an important orchid species, we assessed four Dendrobium catenatum cultivars co-cultured with three fungi previously isolated from D. catenatum. Fungal endophytes (Tulasnella sp., Leptosphaeria microscopica, and Guignardia sp.) specifically affected the growth and chemical composition of the four cultivars. Fungal infection significantly increased certain growth traits, especially mid-stem thickness, stem biomass, stem polysaccharide and ethanol-soluble extractive content, and leaf flavonoid and phenol content. Presence or abundance of some key chemical components was also altered by fungal treatment. These increases and alterations were highly dependent on the host genotype. The findings of this study contribute to our understanding of Dendrobium and endophytic fungi interactions, and provide vital information for improving the development and use of endophytic fungi in D. catenatum breeding.
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Affiliation(s)
- Ling-Shang Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, 311300, PR China
| | - Wei-Guo Dong
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, 311300, PR China
| | - Jin-Ping Si
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, 311300, PR China.
| | - Jing-Jing Liu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, 311300, PR China
| | - Yu-Qiu Zhu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, Hangzhou, 311300, PR China
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Chitnis VR, Suryanarayanan TS, Nataraja KN, Prasad SR, Oelmüller R, Shaanker RU. Fungal Endophyte-Mediated Crop Improvement: The Way Ahead. FRONTIERS IN PLANT SCIENCE 2020; 11:561007. [PMID: 33193487 PMCID: PMC7652991 DOI: 10.3389/fpls.2020.561007] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/28/2020] [Indexed: 05/05/2023]
Abstract
Endophytes are non-disease causing microbes (bacteria and fungi) surviving in living tissues of plants. Their intimate association and possible coevolution with their plant partners have resulted in them contributing to an array of plant growth benefits ranging from enhanced growth and biomass accumulation, tolerance to abiotic and biotic stresses and in nutrient acquisition. The last couple of decades have witnessed a burgeoning literature on the role of endophytes (Class 3 type) in regulating plant growth and development and their adaptation to abiotic and biotic stresses. Though the underlying mechanisms of plant-endophyte interactions are far from clear, several studies have raised the hope of their potential application in agriculture, especially in mitigating abiotic and biotic stresses. The use of endophytes is envisaged as a route to reduce the production cost and burden on the environment by lessening the dependence on breeding for crop improvement and agrochemicals. Unfortunately, save a few well documented examples of their use, a little of these insights has been translated into actual agricultural applications. Here, we reflect on this paucity and elaborate on some of the important bottlenecks that might stand in way of fully realizing the potential that endophytes hold for crop improvement. We stress the need to study various facets of the endophyte-plant association for their gainful application in agriculture.
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Affiliation(s)
- Vijaya R. Chitnis
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, India
- *Correspondence: Vijaya R. Chitnis,
| | - Trichur S. Suryanarayanan
- Vivekananda Institute of Tropical Mycology (VINSTROM), Ramakrishna Mission Vidyapith, Chennai, India
| | - Karaba N. Nataraja
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, India
| | - S. Rajendra Prasad
- Department of Seed Science and Technology, University of Agricultural Sciences, GKVK, Bangalore, India
| | - Ralf Oelmüller
- Plant Physiology, Matthias-Schleiden Institute, Friedrich-Schiller – University, Jena, Germany
| | - R. Uma Shaanker
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK, Bangalore, India
- Vivekananda Institute of Tropical Mycology (VINSTROM), Ramakrishna Mission Vidyapith, Chennai, India
- R. Uma Shaanker,
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Esposito-Polesi NP. Contaminação versus manifestação endofítica: implicações no cultivo in vitro de plantas. RODRIGUÉSIA 2020. [DOI: 10.1590/2175-7860202071072] [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
Resumo A cultura de tecidos vegetais é imprescindível à propagação e multiplicação uniforme de plantas, à conservação de germoplasma, a programas de melhoramento e à transformação genética. Essa técnica tem exigido, cada vez mais, estudos que colaborem com o entendimento dos mecanismos envolvidos no crescimento dos microrganismos nos meios de cultivo, bem como as relações que eles estabelecem com a planta hospedeira. Dessa maneira, a presente revisão pretende esclarecer esses questionamentos e promover a distinção entre contaminação e manifestação endofítica que ocorrem no cultivo in vitro por diferentes causas. Tal distinção permite diminuir o pânico que se instala quando do seu aparecimento, além de auxiliar na adoção de medidas de prevenção e/ou controle desses eventos sem que haja descartes desnecessários de material de alto valor comercial e genético.
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Duan X, Xu F, Qin D, Gao T, Shen W, Zuo S, Yu B, Xu J, Peng Y, Dong J. Diversity and bioactivities of fungal endophytes from Distylium chinense, a rare waterlogging tolerant plant endemic to the Three Gorges Reservoir. BMC Microbiol 2019; 19:278. [PMID: 31822262 PMCID: PMC6902458 DOI: 10.1186/s12866-019-1634-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 11/06/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The present study involves diversity and biological activities of the endophytic fungal community from Distylium chinense, a rare waterlogging tolerant plant endemic to the Three Gorges Reservoir. This study has been conducted hypothesizing that the microbial communities in the TGR area would contribute to the host plant tolerating a range of abiotic stress such as summer flooding, infertility, drought, salinity and soil erosion etc., and they may produce new metabolites, which may possess plentiful bioactive property, especially antioxidant activity. Therefore in the current study, the antioxidant, antimicrobial and anticancer activities of 154 endophytes recovered from D. chinense have been investigated. Furthermore, the active metabolites of the most broad-spectrum bioactive strain have also been studied. RESULTS A total of 154 fungal endophytes were isolated from roots and stems. They were categorized into 30 morphotypes based on cultural characteristics and were affiliated with 27 different taxa. Among these, the most abundant fungal orders included Diaporthales (34.4%) and Botryosphaeriales (30.5%), which were predominantly represented by the species Phomopsis sp. (24.7%) and Neofusicoccum parvum (23.4%). Fermentation extracts were evaluated, screening for antioxidant, antimicrobial and anticancer activities. Among the 154 isolates tested, 99 (64.3%) displayed significant antioxidant activity, 153 (99.4%) exhibited inclusive antimicrobial activity against at least one tested microorganism and 27 (17.5%) showed exclusive anticancer activity against one or more cancer cell lines. Specifically, the crude extract of Irpex lacteus DR10-1 exhibited note-worthy bioactivities. Further chemical investigation on DR10-1 strain resulted in the isolation and identification of two known bioactive metabolites, indole-3-carboxylic acid (1) and indole-3-carboxaldehyde (2), indicating their potential roles in plant growth promotion and human medicinal value. CONCLUSION These results indicated that diverse endophytic fungal population inhabits D. chinense. One of the fungal isolate DR10-1 (Irpex lacteus) exhibited significant antioxidant, antimicrobial and anticancer potential. Further, its active secondary metabolites 1 and 2 also showed antioxidant, antimicrobial and anticancer potential.
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Affiliation(s)
- Xiaoxiang Duan
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
- Laboratory Animal Research Institute of Chongqing Academy of Chinese Materia Medica, Chongqing, 400065 People’s Republic of China
| | - Fangfang Xu
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Dan Qin
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Tiancong Gao
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Weiyun Shen
- First Affiliated Hospital, Huzhou Teachers College, The First People’s Hospital of Huzhou, 158 Guangchanghou Road, Huzhou, 313000 People’s Republic of China
| | - Shihao Zuo
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Baohong Yu
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Jieru Xu
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Yajun Peng
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
| | - Jinyan Dong
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, School of Life Sciences, Southwest University, Chongqing, 400715 People’s Republic of China
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Liu Y, He F. Incorporating the disease triangle framework for testing the effect of soil‐borne pathogens on tree species diversity. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13345] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yu Liu
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences East China Normal University Shanghai China
- Shanghai Institute of Pollution Control and Ecological Security Shanghai China
| | - Fangliang He
- ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences East China Normal University Shanghai China
- Department of Renewable Resources University of Alberta Edmonton Alberta Canada
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23
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Gehman AM, Harley CDG. Symbiotic endolithic microbes alter host morphology and reduce host vulnerability to high environmental temperatures. Ecosphere 2019. [DOI: 10.1002/ecs2.2683] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Affiliation(s)
- Alyssa‐Lois M. Gehman
- Department of Zoology University of British Columbia Vancouver British Columbia Canada
- Hakai Institute, End of Kwakshua Channel Calvert Island British Columbia Canada
| | - Christopher D. G. Harley
- Department of Zoology University of British Columbia Vancouver British Columbia Canada
- Institute for the Oceans and Fisheries University of British Columbia Vancouver British Columbia Canada
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Endophytic Fungi: Promising Source of Novel Bioactive Compounds. ADVANCES IN ENDOPHYTIC FUNGAL RESEARCH 2019. [DOI: 10.1007/978-3-030-03589-1_12] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Rather RA, Srinivasan V, Anwar M. Seasonal deviation effects foliar endophyte assemblage and diversity in Asparagus racemosus and Hemidesmus indicus. BMC Ecol 2018; 18:52. [PMID: 30514254 PMCID: PMC6278056 DOI: 10.1186/s12898-018-0211-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 11/27/2018] [Indexed: 11/29/2022] Open
Abstract
Background Fungal endophytes are the living symbionts which cause no apparent damage to the host tissue. The distribution pattern of these endophytes within a host plant is mediated by environmental factors. This study was carried out to explore the fungal endophyte community and their distribution pattern in Asparagus racemosus and Hemidesmus indicus growing in the study area. Results Foliar endophytes were isolated for 2 years from A. racemosus and H. indicus at four different seasons (June–August, September–November, December–February, March–May). A total of 5400 (675/season/year) leaf segments harbored 38 fungal species belonging to 17 genera, 12 miscellaneous mycelia sterile from 968 isolates and 13 had yeast like growth. In A. racemosus, Acremonium strictum and Phomopsis sp.1, were dominant with overall relative colonization densities (RCD) of 7.11% and 5.44% respectively, followed by Colletotrichum sp.3 and Colletotrichum sp.1 of 4.89% and 4.83% respectively. In H. indicus the dominant species was A. strictum having higher overall RCD of 5.06%, followed by Fusarium moniliforme and Colletotrichum sp.2 with RCD of 3.83% and 3%, respectively. Further the overall colonization and isolation rates were higher during the wet periods (September–November) in both A. racemosus (92.22% and 95.11%) and H. indicus (82% and 77.11%). Conclusion Study samples treated with 0.2% HgCl2 and 75% EtOH for 30 s and 1 min, respectively, confirmed most favorable method of isolation of the endophytes. Owing to high mean isolation and colonization rates, September–November season proved to be the optimal season for endophyte isolation in both the study plants. Assessing the bioactive potential of these endophytes, may lead to the isolation of novel natural products and metabolites.
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Affiliation(s)
- Riyaz Ahmad Rather
- Department of Biotechnology, School of Natural and Computational Science, Wachemo University, Hossana, Ethiopia. .,Department of Biotechnology, VELS University, Chennai, India.
| | | | - Mumtaz Anwar
- Department of Pharmacology, College of Medicine, University of Illinois, Chicago, USA
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Materatski P, Varanda C, Carvalho T, Dias AB, Campos MD, Rei F, Félix MDR. Spatial and temporal variation of fungal endophytic richness and diversity associated to the phyllosphere of olive cultivars. Fungal Biol 2018; 123:66-76. [PMID: 30654959 DOI: 10.1016/j.funbio.2018.11.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 11/08/2018] [Indexed: 11/15/2022]
Abstract
Fungal endophytes are micro-organisms that colonize healthy plant tissues without causing disease symptoms. They are described as plant growth and disease resistance promoters and have shown antimicrobial activity. The spatial-temporal distribution of endophytic communities in olive cultivars has been poorly explored. This study aims to investigate the richness and diversity of endophytic fungi in different seasons and sites, within the Alentejo region, Portugal. Additionally, and because the impact of some pathogenic fungi (e.g. Colletotrichum spp.) varies according to olive cultivars; three cultivars, Galega vulgar, Cobrançosa and Azeiteira, were sampled. 1868 fungal isolates were identified as belonging to 26 OTUs; 13 OTUs were identified to the genera level and 13 to species level. Cultivar Galega vulgar and season autumn showed significant higher values in terms of endophytic richness and diversity. At site level, Elvas showed the lowest fungal richness and diversity of fungal endophytes. This study reinforces the importance of exploring the combined spatio-temporal distribution of the endophytic biodiversity in different olive cultivars. Knowledge about endophytic communities may help to better understand their functions in plants hosts, such as their ecological dynamics with pathogenic fungi, which can be explored for their use as biocontrol agents.
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Affiliation(s)
- Patrick Materatski
- ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Instituto de Investigação e Formação Avançada, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal.
| | - Carla Varanda
- ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Instituto de Investigação e Formação Avançada, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Teresa Carvalho
- INIAV - Instituto Nacional de Investigação Agrária e Veterinária, I. P. Estrada de Gil Vaz, Apartado 6, 7351-901 Elvas, Portugal
| | - António Bento Dias
- Departamento de Engenharia Rural, ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Escola de Ciências e Tecnologia, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - M Doroteia Campos
- ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Instituto de Investigação e Formação Avançada, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Fernando Rei
- Departamento de Fitotecnia, ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Escola de Ciências e Tecnologia, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Maria do Rosário Félix
- Departamento de Fitotecnia, ICAAM - Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Escola de Ciências e Tecnologia, Universidade de Évora, Polo da Mitra, Ap. 94, 7006-554 Évora, Portugal
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Gomes T, Pereira JA, Benhadi J, Lino-Neto T, Baptista P. Endophytic and Epiphytic Phyllosphere Fungal Communities Are Shaped by Different Environmental Factors in a Mediterranean Ecosystem. MICROBIAL ECOLOGY 2018; 76:668-679. [PMID: 29500493 DOI: 10.1007/s00248-018-1161-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 02/13/2018] [Indexed: 06/08/2023]
Abstract
The diversity and factors influencing fungal assemblages in phyllosphere of Mediterranean tree species have been barely studied, especially when endophytic and epiphytic communities are simultaneously considered. In this work, the endophytic and epiphytic fungal communities from olive tree phyllosphere were studied. This tree species is natural from the Mediterranean region and adapted to grow under adverse climatic conditions. The main objectives were to determine whether there are differences between both fungal communities and to examine whether different abiotic (climate-related) and biotic (plant organs) factors play a pivotal role in structuring these communities. Both communities differed in size and composition, with epiphytic community being richer and more abundant, displaying also a dominance of melanized fungi. Season was the major driver of community composition, especially of epiphytes. Other drivers shaping epiphytes were wind speed and temperature, while plant organ, rainfall, and temperature were the major drivers for endophytic composition. In contrast, canopy orientation caused slight variations in community composition of fungi, but with distinct effects in spring and autumn seasons. In conclusion, epiphytic and endophytic communities are not driven by the same factors. Several sources of variation undergo complex interactions to form and maintain phyllosphere fungal community in Mediterranean climates. Climatic parameters have influence on these fungal communities, suggesting that they are likely to be affected by climate changes in a near future.
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Affiliation(s)
- Teresa Gomes
- School of Agriculture-Polytechnic Institute of Bragança, CIMO, Campus Sta Apolónia, 5300-253, Bragança, Portugal
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center (CBFP), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - José Alberto Pereira
- School of Agriculture-Polytechnic Institute of Bragança, CIMO, Campus Sta Apolónia, 5300-253, Bragança, Portugal
| | - Jacinto Benhadi
- School of Agriculture-Polytechnic Institute of Bragança, CIMO, Campus Sta Apolónia, 5300-253, Bragança, Portugal
| | - Teresa Lino-Neto
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center (CBFP), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Paula Baptista
- School of Agriculture-Polytechnic Institute of Bragança, CIMO, Campus Sta Apolónia, 5300-253, Bragança, Portugal.
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Tree pathogens and their insect-mediated transport: Implications for oak tree die-off in a natural park area. Glob Ecol Conserv 2018. [DOI: 10.1016/j.gecco.2018.e00437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Uzma F, Mohan CD, Hashem A, Konappa NM, Rangappa S, Kamath PV, Singh BP, Mudili V, Gupta VK, Siddaiah CN, Chowdappa S, Alqarawi AA, Abd Allah EF. Endophytic Fungi-Alternative Sources of Cytotoxic Compounds: A Review. Front Pharmacol 2018; 9:309. [PMID: 29755344 PMCID: PMC5932204 DOI: 10.3389/fphar.2018.00309] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 03/16/2018] [Indexed: 12/29/2022] Open
Abstract
Cancer is a major cause of death worldwide, with an increasing number of cases being reported annually. The elevated rate of mortality necessitates a global challenge to explore newer sources of anticancer drugs. Recent advancements in cancer treatment involve the discovery and development of new and improved chemotherapeutics derived from natural or synthetic sources. Natural sources offer the potential of finding new structural classes with unique bioactivities for cancer therapy. Endophytic fungi represent a rich source of bioactive metabolites that can be manipulated to produce desirable novel analogs for chemotherapy. This review offers a current and integrative account of clinically used anticancer drugs such as taxol, podophyllotoxin, camptothecin, and vinca alkaloids in terms of their mechanism of action, isolation from endophytic fungi and their characterization, yield obtained, and fungal strain improvement strategies. It also covers recent literature on endophytic fungal metabolites from terrestrial, mangrove, and marine sources as potential anticancer agents and emphasizes the findings for cytotoxic bioactive compounds tested against specific cancer cell lines.
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Affiliation(s)
- Fazilath Uzma
- Microbial Metabolite Research Laboratory, Department of Microbiology and Biotechnology, Bangalore University, Bangalore, India
| | - Chakrabhavi D Mohan
- Department of Studies in Molecular Biology, University of Mysore, Mysore, India
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | - Shobith Rangappa
- Adichunchanagiri Institute for Molecular Medicine, BG Nagara, Mandya, India
| | - Praveen V Kamath
- Microbial Metabolite Research Laboratory, Department of Microbiology and Biotechnology, Bangalore University, Bangalore, India
| | - Bhim P Singh
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University, Aizawl, India
| | - Venkataramana Mudili
- Microbiology Division, DRDO-BU-Centre for Life sciences, Bharathiar University, Coimbatore, India
| | - Vijai K Gupta
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, School of Science, Tallinn University of Technology, Tallinn, Estonia
| | - Chandra N Siddaiah
- Department of Studies in Biotechnology, University of Mysore, Mysore, India
| | - Srinivas Chowdappa
- Microbial Metabolite Research Laboratory, Department of Microbiology and Biotechnology, Bangalore University, Bangalore, India
| | - Abdulaziz A Alqarawi
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Elsayed F Abd Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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Quorum sensing inhibitors: can endophytes be prospective sources? Arch Microbiol 2017; 200:355-369. [PMID: 29026943 DOI: 10.1007/s00203-017-1437-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 09/02/2017] [Accepted: 10/05/2017] [Indexed: 01/16/2023]
Abstract
Endophytes are microbes which reside inside the plant tissues asymptomatically or causing pathogenicity to the host plant for a brief period. Owing to their presence in a specialized niche, endophytes are capable of synthesizing diverse types of bioactive molecules. Continuous development of resistance mechanism by pathogens to the currently available health treatments and pharmaceuticals has led researchers to explore new therapeutic agents. Quorum sensing has a role in the development of microbial pathogenic traits including biofilm formation. Utilization of quorum sensing (QS) inhibitors in antivirulence approach against pathogenesis is one of the innovative strategies. Endophytic microbes provide a plethora of such required bioactive molecules. This review summarizes the bioprospecting of endophytic microbes for production of novel QS inhibitors. At the outset, an overview is presented about the QS and QS inhibition followed by a summary on the endophytes as a treasure trove of bioactive metabolites, particularly the QS inhibitors. Next, we have outlined screening, purification, production, and application of QS inhibitors starting from the isolation of endophytic microbes. There is huge prospect for endophytes in the domain of human healthcare and food industry, provided that we develop a comprehensive understanding of the biology of endophyte and its ecosystem.
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Ibrahim M, Sieber TN, Schlegel M. Communities of fungal endophytes in leaves of Fraxinus ornus are highly diverse. FUNGAL ECOL 2017. [DOI: 10.1016/j.funeco.2017.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Traditional and Novel Indicators of Climate Change Impacts on European Forest Trees. FORESTS 2017. [DOI: 10.3390/f8040137] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Moricca S, Linaldeddu BT, Ginetti B, Scanu B, Franceschini A, Ragazzi A. Endemic and Emerging Pathogens Threatening Cork Oak Trees: Management Options for Conserving a Unique Forest Ecosystem. PLANT DISEASE 2016; 100:2184-2193. [PMID: 30682920 DOI: 10.1094/pdis-03-16-0408-fe] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cork oak (Quercus suber) forests are economically and culturally intertwined with the inhabitants of the Mediterranean basin and characterize its rural landscape. These forests cover over two million hectares in the western Mediterranean basin and sustain a rich biodiversity of endemisms as well as representing an important source of income derived from cork production. Currently cork oak forests are threatened by several factors including human-mediated disturbances such as poor or inappropriate management practices, adverse environmental conditions (irregular water regime with prolonged drought periods), and attacks of pathogens and pests. All these adverse factors can interact, causing a complex disease commonly known as "oak decline." Despite the numerous investigations carried out so far, decline continues to be the main pathological problem of cork oak forests because of its complex etiology and the resulting difficulties in defining suitable control strategies. An overview of the literature indicates that several pathogenic fungi and oomycota can play a primary role in the etiology of this syndrome. Therefore, the aim of this review is to analyze the recent advances achieved regarding the bio-ecology of the endemic and emerging pathogens that threaten cork oak trees with particular emphasis on the species more directly involved in oak decline. Moreover, the effect of climate change on the host-pathogen interactions, a task fundamental for making useful decisions and managing cork oak forests properly, is considered.
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Affiliation(s)
- Salvatore Moricca
- Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente (DISPAA), Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Firenze, 50144 Firenze, Italy
| | - Benedetto T Linaldeddu
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari, 07100, Sassari, Italy
| | - Beatrice Ginetti
- Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente (DISPAA), Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Firenze, 50144 Firenze, Italy
| | - Bruno Scanu
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari, 07100, Sassari, Italy
| | - Antonio Franceschini
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari, 07100, Sassari, Italy
| | - Alessandro Ragazzi
- Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente (DISPAA), Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Firenze, 50144 Firenze, Italy
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Paolinelli-Alfonso M, Villalobos-Escobedo JM, Rolshausen P, Herrera-Estrella A, Galindo-Sánchez C, López-Hernández JF, Hernandez-Martinez R. Global transcriptional analysis suggests Lasiodiplodia theobromae pathogenicity factors involved in modulation of grapevine defensive response. BMC Genomics 2016; 17:615. [PMID: 27514986 PMCID: PMC4981995 DOI: 10.1186/s12864-016-2952-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 07/19/2016] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Lasiodiplodia theobromae is a fungus of the Botryosphaeriaceae that causes grapevine vascular disease, especially in regions with hot climates. Fungi in this group often remain latent within their host and become virulent under abiotic stress. Transcriptional regulation analysis of L. theobromae exposed to heat stress (HS) was first carried out in vitro in the presence of grapevine wood (GW) to identify potential pathogenicity genes that were later evaluated for in planta expression. RESULTS A total of 19,860 de novo assembled transcripts were obtained, forty-nine per cent of which showed homology to the Botryosphaeriaceae fungi, Neofusicoccum parvum or Macrophomina phaseolina. Three hundred ninety-nine have homology with genes involved in pathogenic processes and several belonged to expanded gene families in others fungal grapevine vascular pathogens. Gene expression analysis showed changes in fungal metabolism of phenolic compounds; where genes encoding for enzymes, with the ability to degrade salicylic acid (SA) and plant phenylpropanoid precursors, were up-regulated during in vitro HS response, in the presence of GW. These results suggest that the fungal L-tyrosine catabolism pathway could help the fungus to remove phenylpropanoid precursors thereby evading the host defense response. The in planta up-regulation of salicylate hydroxylase, intradiol ring cleavage dioxygenase and fumarylacetoacetase encoding genes, further supported this hypothesis. Those genes were even more up-regulated in HS-stressed plants, suggesting that fungus takes advantage of the increased phenylpropanoid precursors produced under stress. Pectate lyase was up-regulated while a putative amylase was down-regulated in planta, this could be associated with an intercellular growth strategy during the first stages of colonization. CONCLUSIONS L. theobromae transcriptome was established and validated. Its usefulness was demonstrated through the identification of genes expressed during the infection process. Our results support the hypothesis that heat stress facilitates fungal colonization, because of the fungus ability to use the phenylpropanoid precursors and SA, both compounds known to control host defense.
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Affiliation(s)
- Marcos Paolinelli-Alfonso
- Departamento de Microbiología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, BC 22860 Mexico
| | - José Manuel Villalobos-Escobedo
- Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Centro de Investigación y de Estudios Avanzados del I. P. N., Irapuato, Gto 36821 Mexico
| | - Philippe Rolshausen
- Department of Botany and Plant Sciences,University of California Riverside, Riverside, 92521 CA USA
| | - Alfredo Herrera-Estrella
- Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Centro de Investigación y de Estudios Avanzados del I. P. N., Irapuato, Gto 36821 Mexico
| | - Clara Galindo-Sánchez
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, BC 22860 Mexico
| | - José Fabricio López-Hernández
- Laboratorio Nacional de Genómica para la Biodiversidad (LANGEBIO), Centro de Investigación y de Estudios Avanzados del I. P. N., Irapuato, Gto 36821 Mexico
| | - Rufina Hernandez-Martinez
- Departamento de Microbiología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, BC 22860 Mexico
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Jia M, Chen L, Xin HL, Zheng CJ, Rahman K, Han T, Qin LP. A Friendly Relationship between Endophytic Fungi and Medicinal Plants: A Systematic Review. Front Microbiol 2016; 7:906. [PMID: 27375610 PMCID: PMC4899461 DOI: 10.3389/fmicb.2016.00906] [Citation(s) in RCA: 267] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 05/26/2016] [Indexed: 11/13/2022] Open
Abstract
Endophytic fungi or endophytes exist widely inside the healthy tissues of living plants, and are important components of plant micro-ecosystems. Over the long period of evolution, some co-existing endophytes and their host plants have established a special relationship with one and another, which can significantly influence the formation of metabolic products in plants, then affect quality and quantity of crude drugs derived from medicinal plants. This paper will focus on the increasing knowledge of relationships between endophytic fungi and medicinal plants through reviewing of published research data obtained from the last 30 years. The analytical results indicate that the distribution and population structure of endophytes can be considerably affected by factors, such as the genetic background, age, and environmental conditions of their hosts. On the other hand, the endophytic fungi can also confer profound impacts on their host plants by enhancing their growth, increasing their fitness, strengthening their tolerances to abiotic and biotic stresses, and promoting their accumulation of secondary metabolites. All the changes are very important for the production of bioactive components in their hosts. Hence, it is essential to understand such relationships between endophytic fungi and their host medicinal plants. Such knowledge can be well exploited and applied for the production of better and more drugs from medicinal plants.
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Affiliation(s)
- Min Jia
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Ling Chen
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Hai-Liang Xin
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Cheng-Jian Zheng
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Khalid Rahman
- Department of Physiological Biochemistry, School of Pharmacy and Biomolecular Sciences, Liverpool John Moores UniversityLiverpool, UK
| | - Ting Han
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
| | - Lu-Ping Qin
- Department of Pharmacognosy, School of Pharmacy, Second Military Medical UniversityShanghai, China
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Ducasse H, Arnal A, Vittecoq M, Daoust SP, Ujvari B, Jacqueline C, Tissot T, Ewald P, Gatenby RA, King KC, Bonhomme F, Brodeur J, Renaud F, Solary E, Roche B, Thomas F. Cancer: an emergent property of disturbed resource-rich environments? Ecology meets personalized medicine. Evol Appl 2015; 8:527-40. [PMID: 26136819 PMCID: PMC4479509 DOI: 10.1111/eva.12232] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 10/17/2015] [Indexed: 12/13/2022] Open
Abstract
For an increasing number of biologists, cancer is viewed as a dynamic system governed by evolutionary and ecological principles. Throughout most of human history, cancer was an uncommon cause of death and it is generally accepted that common components of modern culture, including increased physiological stresses and caloric intake, favor cancer development. However, the precise mechanisms for this linkage are not well understood. Here, we examine the roles of ecological and physiological disturbances and resource availability on the emergence of cancer in multicellular organisms. We argue that proliferation of 'profiteering phenotypes' is often an emergent property of disturbed, resource-rich environments at all scales of biological organization. We review the evidence for this phenomenon, explore it within the context of malignancy, and discuss how this ecological framework may offer a theoretical background for novel strategies of cancer prevention. This work provides a compelling argument that the traditional separation between medicine and evolutionary ecology remains a fundamental limitation that needs to be overcome if complex processes, such as oncogenesis, are to be completely understood.
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Affiliation(s)
- Hugo Ducasse
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
| | - Audrey Arnal
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
| | - Marion Vittecoq
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
- Centre de Recherche de la Tour du ValatArles, France
| | - Simon P Daoust
- Department of Biology, John Abbott CollegeSainte-Anne-de-Bellevue, QC, Canada
| | - Beata Ujvari
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin UniversityWaurn Ponds, Vic., Australia
| | - Camille Jacqueline
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
| | - Tazzio Tissot
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
| | - Paul Ewald
- Department of Biology and the Program on Disease Evolution, University of LouisvilleLouisville, KY, USA
| | - Robert A Gatenby
- Department of Radiology, H. Lee Moffitt Cancer Center & Research InstituteTampa, FL, USA
| | - Kayla C King
- Department of Zoology, University of OxfordOxford, UK
| | - François Bonhomme
- ISEM Institut des sciences de l'évolution, Université Montpellier 2, CNRS/IRD/UM2 UMR 5554Montpellier Cedex, France
| | - Jacques Brodeur
- Institut de Recherche en Biologie Végétale, Université de MontréalMontréal, QC, Canada
| | - François Renaud
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
| | - Eric Solary
- INSERM U1009, Université Paris-Sud, Gustave RoussyVillejuif, France
| | - Benjamin Roche
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
- Unité mixte internationale de Modélisation Mathématique et Informatique des Systèmes Complexes (UMI IRD/UPMC UMMISCO)BondyCedex, France
| | - Frédéric Thomas
- MIVEGEC, UMR IRD/CNRS/UM 5290Montpellier Cedex 5, France
- CREEC, Université Montpellier 2Montpellier Cedex 5, France
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Chadha N, Mishra M, Rajpal K, Bajaj R, Choudhary DK, Varma A. An ecological role of fungal endophytes to ameliorate plants under biotic stress. Arch Microbiol 2015; 197:869-81. [PMID: 26123239 DOI: 10.1007/s00203-015-1130-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 06/19/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
Abstract
It is our consensus that plants survive and flourish in stressed ecosystems because of endosymbiotic organisms that have co-evolved and were essential for their adaptation to changing environments. Some of these microbial components are noncultivable and vertically transmitted from generation to generation. They represent a vast reservoir of heritable DNA that can enhance plant performance in changing environments and add genetic flexibility to adaptation of long-lived plants. If such endophytes can be identified that not only persist in progeny of novel hosts, but can confer benefits in mechanized, agricultural systems, they would be increasingly important in agricultural production and lead to a rapid and economical method of providing novel germplasms of native and crop plants. In the present review, authors advocate the deployment of fungal diversity and its role to overcome the biotic stress in plants. Endophytic fungal association with plants helps it to protect from various pathogen and pests and adapt to survive in harsh biotic and abiotic stress condition.
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Affiliation(s)
- Neha Chadha
- Amity Institute of Microbial Technology (AIMT), Block 'E-3', 4th Floor, Amity University Campus, Sector-125, Noida, Gautam Buddha Nagar, 201313, UP, India
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Wani ZA, Ashraf N, Mohiuddin T, Riyaz-Ul-Hassan S. Plant-endophyte symbiosis, an ecological perspective. Appl Microbiol Biotechnol 2015; 99:2955-65. [PMID: 25750045 DOI: 10.1007/s00253-015-6487-3] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/13/2015] [Accepted: 02/15/2015] [Indexed: 12/25/2022]
Abstract
Endophytism is the phenomenon of mutualistic association of a plant with a microorganism wherein the microbe lives within the tissues of the plant without causing any symptoms of disease. In addition to being a treasured biological resource, endophytes play diverse indispensable functions in nature for plant growth, development, stress tolerance, and adaptation. Our understanding of endophytism and its ecological aspects are overtly limited, and we have only recently started to appreciate its essence. Endophytes may impact plant biology through the production of diverse chemical entities including, but not limited to, plant growth hormones and by modulating the gene expression of defense and other secondary metabolic pathways of the host. Studies have shown differential recruitment of endophytes in endophytic populations of plants growing in the same locations, indicating host specificity and that endophytes evolve in a coordinated fashion with the host plants. Endophytic technology can be employed for the efficient production of agricultural and economically important plants and plant products. The rational application of endophytes to manipulate the microbiota, intimately associated with plants, can help in enhancement of production of agricultural produce, increased production of key metabolites in medicinal and aromatic plants, as well as adaption to new bio-geographic regions through tolerance to various biotic and abiotic conditions. However, the potential of endophytic biology can be judiciously harnessed only when we obtain insight into the molecular mechanism of this unique mutualistic relationship. In this paper, we present a discussion on endophytes, endophytism, their significance, and diverse functions in nature as unraveled by the latest research to understand this universal natural phenomenon.
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Affiliation(s)
- Zahoor Ahmed Wani
- Microbial Biotechnology Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu Tawi, 180 001, India
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Martin RC, Dombrowski JE. Isolation and Identification of Fungal Endophytes from Grasses along the Oregon Coast. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ajps.2015.619313] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rai M, Agarkar G. Plant-fungal interactions: What triggers the fungi to switch among lifestyles? Crit Rev Microbiol 2014; 42:428-38. [PMID: 25383649 DOI: 10.3109/1040841x.2014.958052] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Up till now various plant-fungal interactions have been extensively studied in the form of mycorrhizal, parasitic or endophytic lifestyles. Many of those interactions are beneficial to the host plants and a few are detrimental. Several investigations have pointed towards the interconversion of one fungal lifestyle into another while interact the plant system meaning endophyte may become parasite or vice versa. In such case, it is necessary to realize whether these different lifestyles are interconnected at some points either by physiological, biochemical or molecular routes and to identify the factors that trigger the change in fungal lifestyle, which is entirely different than earlier one and affects the host plant significantly. This review highlights the possible mechanisms of switching among the lifestyles of fungi based on recent findings and discusses the factors affecting plant fungal interactions. It also underlines the need for studying this important facet of plant-fungal interactions in depth which may in future help to fetch more advantages and to avoid the severe consequences in agriculture and other related fields.
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Affiliation(s)
- Mahendra Rai
- a Department of Biotechnology , SGB Amravati University , Amravati , Maharashtra , India
| | - Gauravi Agarkar
- a Department of Biotechnology , SGB Amravati University , Amravati , Maharashtra , India
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Characteristics of foliar fungal endophyte assemblages and host effective components in Salvia miltiorrhiza Bunge. Appl Microbiol Biotechnol 2013; 98:3143-55. [DOI: 10.1007/s00253-013-5300-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/24/2013] [Accepted: 09/27/2013] [Indexed: 01/02/2023]
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Qi F, Jing T, Zhan Y. Characterization of endophytic fungi from Acer ginnala Maxim. in an artificial plantation: media effect and tissue-dependent variation. PLoS One 2012; 7:e46785. [PMID: 23056451 PMCID: PMC3466316 DOI: 10.1371/journal.pone.0046785] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 09/06/2012] [Indexed: 11/19/2022] Open
Abstract
The community of endophytic fungi associated with Acer ginnala, a common tree in northeastern China, was investigated. Four media, PDA, Czapek's, WA and Sabouraud's, were used to inoculate explants from seeds, annual twigs and perennial twigs (xylem and bark). Media strongly affected the isolated species number, but not colonization frequency (CF) or isolation frequency (IF). To investigate media effect further, a Principal Component Analysis (PCA) was done. As a result, two components accounted for 86.502% of the total variance were extracted. These two components were named as PDA-determined factor (accounted for 45.139% of the total variance) and Czapek's-determined factor (accounted for 41.363% of the total variance), respectively. This result suggested that only two media, PDA and Czapek's, could be used instead of all four media in this study without affecting the isolation results significantly. In total, ten taxa were isolated in this study. Alternaria sp., Phomopsis sp., Neurospora sp. and Phoma sp. were dominant endophytes while Pleosporales Incertae Sedis sp., Cladosporium sp., Trichoderma sp. and Epicoccum sp. were rare taxa. Different tissues/organs had different endophyte assemblages. All tissue/organ pairs had low Bray-Curtis indices (<0.3) except for bark and annual twigs (0.63). Compared to perennial twigs, annual twigs had a lower taxon number, lower isolate number, lower endophyte dominance and diversity indices. Seeds had distinct assemblage, lower similarity and similar low diversity indices to annual twigs. These results suggested that tissue type determines the endophyte assemblage while age determines the diversity.
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Affiliation(s)
- Fenghui Qi
- School of Life Sciences, Northeast Forestry University, Harbin, China
| | - Tianzhong Jing
- School of Forestry, Northeast Forestry University, Harbin, China
| | - Yaguang Zhan
- School of Life Sciences, Northeast Forestry University, Harbin, China
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Larkin BG, Hunt LS, Ramsey PW. Foliar nutrients shape fungal endophyte communities in Western white pine (Pinus monticola) with implications for white-tailed deer herbivory. FUNGAL ECOL 2012. [DOI: 10.1016/j.funeco.2011.11.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Hersh MH, Vilgalys R, Clark JS. Evaluating the impacts of multiple generalist fungal pathogens on temperate tree seedling survival. Ecology 2012; 93:511-20. [DOI: 10.1890/11-0598.1] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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48
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Aly AH, Debbab A, Proksch P. Fungal endophytes: unique plant inhabitants with great promises. Appl Microbiol Biotechnol 2011; 90:1829-45. [PMID: 21523479 DOI: 10.1007/s00253-011-3270-y] [Citation(s) in RCA: 312] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 03/23/2011] [Accepted: 03/23/2011] [Indexed: 01/22/2023]
Abstract
Fungal endophytes residing in the internal tissues of living plants occur in almost every plant on earth from the arctic to the tropics. The endophyte-host relationship is described as a balanced symbiotic continuum ranging from mutualism through commensalism to parasitism. This overview will highlight selected aspects of endophyte diversity, host specificity, endophyte-host interaction and communication as well as regulation of secondary metabolite production with emphasis on advanced genomic methods and their role in improving our current knowledge of endophytic associations. Furthermore, the chemical potential of endophytic fungi for drug discovery will be discussed with focus on the detection of pharmaceutically valuable plant constituents as products of fungal biosynthesis. In addition, selected examples of bioactive metabolites reported in recent years (2008-2010) from fungal endophytes residing in terrestrial plants are presented grouped according to their reported biological activities.
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Affiliation(s)
- Amal Hassan Aly
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, Düsseldorf, Germany.
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Musetti R, Grisan S, Polizzotto R, Martini M, Paduano C, Osler R. Interactions between 'Candidatus Phytoplasma mali' and the apple endophyte Epicoccum nigrum in Catharanthus roseus plants. J Appl Microbiol 2011; 110:746-56. [PMID: 21205105 DOI: 10.1111/j.1365-2672.2011.04937.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS We investigated the ultrastructural and molecular interactions between 'Candidatus Phytoplasma mali' and the apple endophyte Epicoccum nigrum in the experimental host Catharanthus roseus to determine whether inoculation of endophyte could trigger defence reactions in the host. METHODS AND RESULTS Apple proliferation (AP) symptom severity was evaluated in AP-grafted plants that were treated by E. nigrum and compared with untreated controls. Phytoplasma concentration was quantified by real-time PCR in treated and untreated plants. Ultrastructural observations revealed that in endophyte-treated periwinkles, modifications to phytoplasmas, such as irregular shape and cytoplasm confined to the periphery of the cell, and plant cytological changes, such as abundant callose depositions and P-protein aggregations in the sieve elements, occurred. AP-grafted plants that were treated by the endophyte (E. nigrum) showed a reduction in symptom severity; in particular, flowers appeared normal in shape and size, when compared with uninfected controls. Real-time PCR indicated that phytoplasma concentration in AP-grafted plants treated with E. nigrum was about 2·8 times lower than that in untreated ones. CONCLUSIONS These results demonstrated that the inoculation with E. nigrum influenced phytoplasma infection in C. roseus plants; plant ultrastructural modifications allowed us to hypothesize an enhancing host defence response. SIGNIFICANCE AND IMPACT OF THE STUDY At present, curative protocols against this phytoplasma are not available. Alternative approaches are thus required to reduce disease spread. Our study might represent a first step in the clarification of plant-phytoplasma-endophyte relationships to find possible strategies for the control of phytoplasma diseases.
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Affiliation(s)
- R Musetti
- Dipartimento di Biologia e Protezione delle Piante, Università di Udine, Udine, Italy.
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The Holomorph Apiognomonia quercina/Discula quercina as a Pathogen/Endophyte in Oak. ENDOPHYTES OF FOREST TREES 2011. [DOI: 10.1007/978-94-007-1599-8_3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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