The diversity and functional roles of the plant associated endophytic actinobacteria in unique habitats remain poorly understood. Endophytic actinomycetes from medicinal plants produce a wide diversity of secondary metabolites sm. Isolation of endophytic actinomycetes from selected plants. Isolation, plant growthpromoting traits, antagonistic.
In this paper, we examined the phylogenetic diversity and community composition of endophytic actinobacteria associated with native coastal salt marsh plants in jiangsu, china using a combination of cultivation and 16s rrna genebased highthroughput. The distribution of actinomycetes in various natural habitats, including soil, ocean, extreme environments, plant, lichens and animals, is described. Isolation and morphological characterization of antibiotic producing actinomycetes nanjwade basavaraj k 1, s chandrashekhara 2, ali m shamarez 1, prakash s goudanavar 2 and fakirappa v manvi 1 1kless college of pharmaceutical sciences, k. Our natural products discovery program utilizes endophytic actinomycetes associated with plants and employs biological assays and hplcbased metabolite profiles as the preliminary screen to identify strains of interest, followed by largescale fermentation and isolation, leading to new andor bioactive natural products. Considering that many actinomycetes were isolated from root tissues, and showed strong antagonistic activity against plant pathogenic fungi, we may speculate that these endophytic actinomycetes have potential for biological control and potential contribution to their ecological adaptation within roots. Six compounds that had both antimicrobial and antitumor activities were separated and purified from isolate streptomyces sp. Isolation and cultivation methods of actinobacteria.
Isolation and cultivation methods of actinobacteria intechopen. Diversity of endophytic bacteria based on illuminabased analysis quality control and analysis of sequencing data. Environmental issues genetic aspects ammonia dna genes genetic research genomics microbiological research phylogeny plant genetics diseases and pests rna sequencing research. Screening of endophytic and rhizospheric actinomycetes with. Endophytic actinomycetes refer to actinomycetes that reside in the inner tissues of healthy host plants. Isolation of endophytic actinomycetes from roots and. Screening of endophytic actinomycetes from different. Isolation and characterization of endophytic actinomycetes. Out of 65 endophytic actinomycete isolates procured from department of microbiology, punjab agricultural university, ludhiana, 35. Recently, endophytic actinomycetes have been recognized as new members of pgpb due to their properties to protect plants from infectious diseases misk and franco, 2011 and their ability to enhance plant growth by carrying several pgptraits including siderophore production rungin et. Bioactive endophytic streptomycetes from the malay peninsula. Most of them are strict saprophytes, while some from parasitic or mutualistic associations with plants and animals.
Ymea was the best media for isolation of actinomycetes from soil. Isolation and morphological characterization of antibiotic. Actinomycetes definition of actinomycetes by medical. Development of endophytic frankia sporangia in field and. These results are superior to those of soil actinomycetes, indicating tremendous potential of endophytic of actinomycetes for exploration. Isolation of endophytic actinomycetes from roots and leaves of maize zea mays. Study on the communities of endophytic fungi and endophytic. Antibacterial activity of endophytic actinomycetes isolated.
Brenner dj, krieg nr, staley jt, garrity gm eds bergeys manual of systematic. A novel antibiotic source ravi ranjan kumar1 and vasantba j. In recent years actinomycetes are widely studied for their plant growth promoting activities and few are commercialized. Please use this identifier to cite or link to this item. Isolation and screening of endophytic actinomycetes were determined by. Isolation of endophytic streptomycetes from above and. Endophytic actinomycetes can be isolated by mostly chemical treatment for surface sterilization followed by serial dilution. The populations of endophytic fungi and actinomycetes from four rice cultivars in the panyu district site 1.
Pdf actinomycetes were also known as actinobacteria and there are gram positive, spore forming, filamentous actinobacteria which usually. Actinomycetes are well recognized for their metabolic versatility that is frequently accompanied by the production of. Investigation of bioactive compounds from endophytic actinomycete submitted by asawin wanbanjob as a partial fulfillment of the requirements for the degree of master of science, program of organic chemistry. Investigation of bioactive compounds from endophytic actinomycete submitted by asawin wanbanjob as a partial fulfillment of the requirements for the degree. Endophytic actinomycetes as potential agents to control.
Pdf endophytic actinomycetes as emerging source for. Biosynthetic potential of phylogenetically unique endophytic. The host may, however, influence the number and seasonal appearance of sporangia formed. Healthy banana plantlets are made resistance against. As evident from the recent literature, endophytic actinomycetes are being increasingly explored for new therapeutic molecules which. The mycelium in some species may break apart to form rod or coccoidshaped forms. Isolation and identification of endophytic actinomycetes and their antifungal activity article pdf available january 2008 with 2,260 reads how we measure reads. A total of 55 separate isolates were obtained from 20 plants, and 60% of these showed inhibitory activity against one or more pathogenic fungi and bacteria. Isolates were characterized and identified morphologically as well as using 16s ribosomal rna gene sequencing. The present study was conducted with a view to screen endophytic actinomycetes from four vegetable crops solanum lycopersicum, capsicum annum, solanum tuberosum and cucumis melo and evaluate their potential to produce plant growth promoting and biocontrol agents. However, to date, the knowledge about endophytes from brazil remains scarce. The collection and pretreatment of test samples from different sources, design principle of.
Sequences were saved in fasta format and then copied and pasted at the. Department of quality assurance, maharashtra college of pharmacy, nilanga, dist. Studies on endophytic actinomycetes i streptomyces sp. Besides these roles, they are also known to produce. The isolation of endophytic actinomycetes from surfacesterilized tissues of 36 plant species was made using humic acidvitamin hv agar as a selection medium. The number of isolated colonies on each medium was counted and it was observed that amongst the five different media ymea medium showed good growth and more number of actinomycetes compared to other media.
University, nehru nagar, belgaum, karnataka, 2 kless college. Journal of chemical and pharmaceutical research, 2017, 9. Strategy for a range of isolation methods have been mentioned in this. In this study, 123 endophytic actinomycetes were isolated from tropical plants collected from several locations in. Freeliving actinomycetes are commonly called the saprophytic and other actinomycetes are known as the endophytic that are associated with the plants. Actinobacteriaderived antibiotics that are important in medicine include aminoglycosides, anthracyclines, chloramphenicol, macrolide, tetracyclines, etc. Jul 17, 2019 diversity of endophytic bacteria based on illuminabased analysis quality control and analysis of sequencing data. Insights into the functionality of endophytic actinobacteria. The present study was undertaken to study the evaluation of endophytic actinomycete isolates for their plant growth promotion in wheat.
May 14, 2019 the diversity and functional roles of the plant associated endophytic actinobacteria in unique habitats remain poorly understood. Lorneic acid analogues from an endophytic actinomycete. A novel source of potential acyl homoserine lactone degrading enzymes surang chankhamhaengdecha,1,2,3 suphatra hongvijit,2,3,4,5 akkaraphol srichaisupakit,1,2,3 pattra charnchai,2,3,4 and watanalai panbangred2,3,4,5 1 department of biology, faculty of science, mahidol university, rama vi road, bangkok 10400, thailand. Preliminary screening of crude extract from endophytic and freshwater actinomycetes for antimicrobial activity against microbial pathogens of aquatic animals and. A total of 36 endophytic actinomycetes were isolated from roots, stems and leaves of emblica officinalis gaertn gooseberry and identified as streptomyces sp.
Endophytic actinomycetes, which reside within the plant tissues, are reported to have several beneficial effects on the. Endophytic actinomycetes, which reside within the plant tissues, are reported to have several beneficial effects on the hostplants, such as, inhibition of pathogens, increase in availability of nutrients like nitrogen and phosphorus, increasing plant growth etc. Identification of endophytic actinomycetes from indonesian rice plant based on 16s rrna and nifh genes analyses. In this present investigation the endophytic actinomycetes were isolated from root, stem and leaf of two species of mangrove. Screening of endophytic and rhizospheric actinomycetes. Actinomycetes are one of the most important groups of the rhizosphere colonizing bacteria with multiple growth promoting traits. The actinomycetes encompass two different groups of filamentous bacteria. Screening of endophytic actinomycetes from different indigenous medicinal plants mahesh prasad 1, saneev kumar 2, umesh kumar 3 and anupama 4 1r. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the medicinal plant vochysia divergens located in the pantanal sulmatogrossense, an unexplored wetland in brazil. Bioactive products from plantendophytic grampositive. Biogenesis and optimisation of silver nanoparticles by the. Endophytic strains belonging to this group have been isolated from a wide range of plants, including crop plants, medicinal plants, halophytes, and even some woody tree species 7 15. Virani science collage, kalawad road, rajkot, gujarat360005 2department of microbiology, shree m.
Many types of microbial population such as bacteria and fungi have been. The culturable diversity of endophytic actinomycetes associated with tropical, native. As evident from the recent literature, endophytic actinomycetes are being increasingly explored for new therapeutic molecules which may effectively address the current human health. Endophytic actinomycetes from azadirachta indica a. Diversity and applications of endophytic actinobacteria of. Isolation of endophytic endosporeforming bacteria from. Isolation of endophytic actinomycetes from roots and leaves. Eltarabily ka, hardy gestj, sivasithamparam k 2010 performance of three endophytic actinomycetes in relation to plant growth promotion and biological control of pythium aphanidermatum, a pathogen of cucumber under commercial field production.
Bioactivity of endophytic actinomycetes from medicinal. A correction to this article has been published and is linked from the html and pdf. Actinomycete, order actinomycetales, any member of a heterogeneous group of grampositive, generally anaerobic bacteria noted for a filamentous and branching growth pattern that results, in most forms, in an extensive colony, or mycelium. Actinomycetes article about actinomycetes by the free. Agriculture and natural resources kasetsart university. Endophytic actinomycetes as potential agents to control common scab of potatoes alaxandra goodman introduction the potato increasing healthy crop yields is an important task for the agricultural industry. The endophytic actinomycetes which are associated with plants also play important role in protection their host from phytopathogenic invasions crawford et al. Identification of endophytic actinomycetes from indonesian. Identification of endophytic actinomycetes was based on their morphology and the.
Isolation of endophytic actinomycetes from roots and leaves of maize zea mays l. Identification of endophytic actinomycetes from indonesian rice plant based on 16s rrna and nifh genes analyses several clinically significant antibiotics as well as widely used drugs against common diseases have been derived from this unique genus affiliated with the order actinomycetales 1. Pdf actinomycetes were also known as actinobacteria and there are grampositive, spore forming, filamentous actinobacteria which usually. College of pharmacy, agra, uttar pradesh, india 2institute of pharmacy, monad university, uttar pradesh, india 3bhagwant institute of pharmacy, muzaffarnagar, u. Recently, endophytic actinomycetes were reported in several chinese mangrove plants to exhibit antibacterial activity against acinetobacter baumannii, enterococcus faecalis, e. Screening of locally isolated actinomycetes and endophytic fungi for production of bioactive compounds in accordance with universiti pertanian malaysia higher degree act 1980 and universiti pertanian malaysia higher degree regulations 1981. Actinobacteria have high guanine and cytosine content in their dna. Molecular characterization and antibacterial effect of endophytic. Optimization of largescale production of active compounds crude or pure form from endophytic and freshwater actinomycetes. Actinomycetes are generally found freely in soil habitats, but they are also localized within the plant parts like roots, leaves, and stems. Pdf the diversity, plant growth promoting and anti. Potatoes solanum tuberosum are not only a regionally relevant food item for residents. Rare actinomycetes isolated by providing combinations of methods or high throughput screening methods. The cultivation of endophytic streptomycetes from aboveand belowground parts of quercus serrata, for example, concluded that some species may be organ specific thongsandee et al.
Endophytic actinomycetes as emerging source for therapeutic. A total of 7, 422 reads and 655 otus were obtained after clustering at a 97%. Actinomycetales definition of actinomycetales by medical. Screening of endophytic and rhizospheric actinomycetes with potential application for biocontrol of fusarium wilt of gladiolus jagpreet kaur, madhurama gangwar and sukhjinder kaur department of microbiology, punjab agricultural university, ludhiana141004, india corresponding author a b s t r a c t gml. Bioprospecting of endophytic actinomycetes for antiphytofungal activity vijitha m. From natural infected tomato leaves showing bacterial speck disease symptoms, six. Diversity of cultureindependent bacteria and antimicrobial. Of the 330 isolates recovered, 212 were from roots, 97 from leaves and 21 isolates from stems with a prevalence of 3.
In this paper, we examined the phylogenetic diversity and community composition of endophytic actinobacteria associated with native coastal salt marsh plants in jiangsu, china using a combination of cultivation and 16s rrna genebased highthroughput sequencing hts. Six new trialkylsubstituted aromatic acids, namely, lorneic acids ej. Ultimately, genetically unique endophytic streptomycetes having a range of biological activities were isolated from. Isolation of endophytic actinomycetes from leaves of tomato. Generating an epub file may take a long time, please be patient. Actinomycetes definition of actinomycetes by the free. Several endophytic actinomycetes act as plant growth promoter by producing of phytohormone, indole3acetic acid iaa or iron chelating.
Two hundred and fortytwo actinomycete strains were isolated from the interior of leaves and roots of healthy and wilting banana plants. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the. Isolation of endophytic endosporeforming bacteria from theobroma cacao as potential biological control agents of cacao diseases rachel l. They are already wellknown for their ability to produce broad spectrum antibiotics. Rearrange individual pages or entire files in the desired order. Drought tolerant endophytic actinobacteria, streptomyces coelicolor de07. Antibacterial activity of endophytic actinomycetes. Isolation of actinomycetes from soil stephen kugbere agadagba department of biochemistry, faculty of life sciences, university of benin, benin city, nigeria abstract the main focus of this study was to isolate some antibiotic producing actinomycetes strains from soil.
Biogenesis and optimisation of silver nanoparticles by the endophytic fungus cladosporium sphaerospermum sobhy i. Endophytes are microbes that colonize living, internal tissues of plants without carrying any immediate over negative effects. Identification of endophytic actinomycetes was based on their morphology and. In order to pursue bioactive products from mangrove actinomycetes, a novel endophytic actinomycetes, identified as jishengella endophytica 161111, had been isolated from the root of the mangrove plant, xylocarpus granatum meliaceae.
The biological control agents of endophytic actinomycetes was investigated to determine whether control of bacterial speck of tomato, caused by pseudomonas syringae pv. Frontiers community composition and metabolic potential. Members of the genus frankia, soilinhabiting actinomycetes, are capable of infecting the roots of woody plants belonging to eight dicotyle. Nine, six and two isolates, with distinguishing characteristics based on the macroscopic appearance of colonies, were obtained from roots, stems and leaves, respectively, suggesting that various species. Medicinal plants constitute the huge diversity of endophytic actinobacteria of. Eleven actinobacterial strains were isolated from different plants, lentil lens esculentus, chickpea cicer arietinum l. D62 by resin adsorption, silicagel column and sephadex chromatography, etc. The mycelium in some species may break apart to form rod. The committee recommends that candidate be awarded the relevant degree. Isolation of endophytic actinomycetes from leaves of. Endophytic actinomycetes were untouched area for microbiologist, but in recent years it was found to be efficient pr oducer of novel antibiotic and lead compounds to develop new medicines. Isolation, abundance and phylogenetic affiliation of endophytic. Endophytic actinomycetes are ubiquitous in most plants and colonise plants without exhibiting pathogenicity.
Actinomycetes have been shown to degrade cellulose, starch and lignin in seawater under laboratory conditions 21. To survey endophytic actinomycetes as potential biocontrol agents against fungal diseases of rhododendron, young plants of rhododendron were surfacesterilized for use as an isolation source. Journal of chemical and pharmaceutical research, 2017, 910. Actinomycetes are one of the most diverse groups of filamentous bacteria capable of surviving in a number of ecological niches due to their bioactive potential. Isolation and identification of endophytic actinomycetes and. Biocontrol of chickpea root rot using endophytic actinobacteria. Antibacterial activity of endophytic actinomycetes isolated from the. Impact of endophytic microorganisms on plants, environment and humans. Actinobacteria actinomycetes have been received much attention, as these bacteria produce a variety of natural drugs and other bioactive metabolites. Community composition and metabolic potential of endophytic. Historically, the actinomycetes were called the ray fungi and were thought to be related to the true fungi, such as bread molds, because they formed mats mycelia of branching filaments hyphae. In this study, 42 endophytic actinomycetes were isolated from. Characteristics of soil actinomycetes from antarctica penka moncheva1, sava tishkov1, nadezhda dimitrova1, valentina chipeva2, stefka antonovanikolova1 and nevena bogatzevska3 1sofia university, biological faculty, department of general and industrial microbiology.740 523 847 826 1075 1398 361 991 213 1358 699 398 174 344 1029 973 1102 210 588 221 1042 662 558 1554 350 22 1376 1337 1414 738 852 963 1254 1087