Actinomycetes isolated from medicinal plant rhizosphere soils: diversity and screening of antifungal compounds, indole-3-acetic acid and siderophore production

Khamna, Sutthinan; Yokota, Akira; Lumyong, Saisamorn

doi:10.1007/s11274-008-9933-x

Cited by 300 publications

(205 citation statements)

References 35 publications

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“…Two endophytic Streptomyces sp. were found to be active against all tested fungal pathogens including strains of Fusarium, Colletotrichum and Alternaria which was in agreement with earlier works of Khamna et al (2009a;2009b) and Intra et al (2011). Streptomyces sp.…”

Section: Discussionsupporting

confidence: 91%

“…Though, Kayini and Pandey (2010) have reported the recovery of endophytic fungi from S. wallichii but, to the best of our knowledge, this is the first attempt made to understand the distribution of endophytic actinomycetes and their potential as biocontrol agent from S. wallichii. Five different nutrient media were used for the recovery of endophytic actinomycetes and found that maximum isolates (36.3%) used SCNA as a source of nutrition, which was in contradictory with the find- ings of Coombs and Fransco (2003) and Khamna et al (2009a;2009b), who suggested that TWYE and HV agar medium were the best media for the isolation of endophytic actinomycetes. All isolates were screened for their antagonistic ability against selected fungal phytopathogens and interestingly, seven isolates identified as Streptomyces sp.…”

Section: Discussionmentioning

confidence: 86%

“…To understand the biosynthetic potential of the isolates, detection of genes encoding polyketide synthase and nonribosomal peptide synthetase mainly responsible for the synthesis of most biologically active polyketide and peptide compounds have been broadly used (Khamna et al, 2009a;2009b). However, our results and findings from other researchers suggest that the antimicrobial potential of the culturable endophytic actinomycetes may only be assessed by screening of antimicrobial activity against desired pathogens.…”

Section: Discussionmentioning

confidence: 99%

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Distribution and Identification of Endophytic Streptomyces Species from Schima wallichii as Potential Biocontrol Agents against Fungal Plant Pathogens

Passari

Mishra

Gupta

et al. 2016

Polish Journal of Microbiology

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A b s t r a c tThe prospective of endophytic microorganisms allied with medicinal plants is disproportionally large compared to those in other biomes. The use of antagonistic microorganisms to control devastating fungal pathogens is an attractive and eco-friendly substitute for chemical pesticides. Many species of actinomycetes, especially the genus Streptomyces, are well known as biocontrol agents. We investigated the culturable community composition and biological control ability of endophytic Streptomyces sp. associated with an ethanobotanical plant Schima wallichi. A total of 22 actinobacterial strains were isolated from different organs of selected medicinal plants and screened for their biocontrol ability against seven fungal phytopathogens. Seven isolates showed significant inhibition activity against most of the selected pathogens. Their identification based on 16S rRNA gene sequence analysis, strongly indicated that all strains belonged to the genus Strepto myces. An endophytic strain BPSAC70 isolated from root tissues showed highest percentage of inhibition (98.3 %) against Fusarium culmorum with significant activity against other tested fungal pathogens. Phylogenetic analysis based on 16S rRNA gene sequences revealed that all seven strains shared 100 % similarity with the genus Streptomyces. In addition, the isolates were subjected to the amplification of antimicrobial genes encoding polyketide synthase type I (PKS-I) and nonribosomal peptide synthetase (NRPS) and found to be present in most of the potent strains. Our results identified some potential endophytic Streptomyces species having antagonistic activity against multiple fungal phytopathogens that could be used as an effective biocontrol agent against pathogenic fungi. K e y w o r d s: Schima wallichii, biocontrol agent, endophytic Streptomyces, nonribosomal peptide synthetase (NRPS), polyketide synthase (PKS-I)

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Distribution and Identification of Endophytic Streptomyces Species from Schima wallichii as Potential Biocontrol Agents against Fungal Plant Pathogens

Passari

Mishra

Gupta

et al. 2016

Polish Journal of Microbiology

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“…Similar results have been reported from various other studies also (Kafur and Khan 2011) where the extract from actinomycetes isolated from Catharanthus roseus was found to be active against C. albicans, Botrytis cinerea, Curvularia lunata, Fusarium oxysporum, Fusarium solani and Rhizoctonia solani. Khamna et al (2008) have reported the extract of actinomycetes to have activity against R. stolonifer, A. flavus, F. oxysporum and Alternaria. Streptomyces sp.…”

Section: Antifungal Activity Analysis Of Nocardiopsis Sp Zoa1 Againsmentioning

confidence: 99%

Endophytic Nocardiopsis sp. from Zingiber officinale with both antiphytopathogenic mechanisms and antibiofilm activity against clinical isolates

2017

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Novel and potential antimicrobial compounds are essential to tackle the frequently emerging multidrugresistant pathogens and also to develop environment friendly agricultural practices. In the current study, endophytic actinomycetes from rhizome of Zingiber officinale were explored in terms of its diversity and bioactive properties. Fourteen different organisms were isolated, identified and screened for activity against Pythium myriotylum and human clinical pathogens. Among these, Nocardiopsis sp. ZoA1 was found to have highest inhibition with excellent antibacterial effects compared to standard antibiotics. Remarkable antibiofilm property was also shown by the extract of ZoA1. Its antifungal activity against Pythium and other common phytopathogens was also found to be promising as confirmed by scanning electron microscopic analysis. By PCR-based sequence analysis of phz E gene, the organism was confirmed for the genetic basis of phenazine biosynthesis. Further GC-MS analysis of Nocardiopsis sp. revealed the presence of various compounds including Phenol, 2,4-bis (1,1-dimethylethyl) and trans cinnamic acid which can have significant role in the observed result. The current study is the first report on endophytic Nocardiopsis sp. from ginger with promising applications. In vivo treatment of Nocardiopsis sp. on ginger rhizome has revealed its inhibition towards the colonization of P. myriotylum which makes the study to have promises to manage the severe diseases in ginger like rhizome rot.

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“…Diversas actinobactérias possuem notável capacidade de produção de metabólitos secundários (antifúngicos e antibacterianos) contra diversos patógenos, entretanto, têm sido descritos como colonizadores de raízes (Khamna et al, 2009). Além disso, destacam-se como produtores de agentes antitumorais, anti-helmínticos, herbicidas, inseticidas sendo que membros do gênero…”

Section: Introductionunclassified

Actinobactérias de biomas brasileiros: biodiversidade e potencial de uso na agricultura

Hoyos¹,

Melo²

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Actinomycetes isolated from medicinal plant rhizosphere soils: diversity and screening of antifungal compounds, indole-3-acetic acid and siderophore production

Cited by 300 publications

References 35 publications

Distribution and Identification of Endophytic Streptomyces Species from Schima wallichii as Potential Biocontrol Agents against Fungal Plant Pathogens

Distribution and Identification of Endophytic Streptomyces Species from Schima wallichii as Potential Biocontrol Agents against Fungal Plant Pathogens

Endophytic Nocardiopsis sp. from Zingiber officinale with both antiphytopathogenic mechanisms and antibiofilm activity against clinical isolates

Actinobactérias de biomas brasileiros: biodiversidade e potencial de uso na agricultura

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