Diversity of soil Allelopathic Actinobacteria in Tiruchirappalli district, Tamilnadu, India

Priyadharsini, P.; Dhanasekaran, D.

doi:10.1016/j.jssas.2013.07.001

Cited by 24 publications

(20 citation statements)

References 18 publications

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“…5) which was found to be 0.18-0.55, 0-0.8178, 0-1.807, 0.869-1, 0-1.36 and 1-1.807, respectively. Similar type of study on diversity index of the actinobacteria was reported by Priyadharsini and Dhanasekaran [23] and Mansour [24]. Only few studies on use of actinobacteria such as Thermomonospora sp.…”

Section: Resultssupporting

confidence: 57%

Diversity of Silver Nanoparticle Synthesizing Actinobacteria Isolated from Marine Soil, Tamil Nadu, India

et al. 2015

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Marine actinobacteria have been considered as a potential source of bioactive compounds holding a prominent position as targets in screening programs due to their diversity and their proven ability to produce novel metabolites and other molecules of pharmaceutical importance. In this regard, an attempt was made to study the diversity of actinobacteria and its ability to synthesize silver nanoparticles in Ramanathapuram and Thoothukudi districts of Tamil Nadu. A total of 1143 actinobacteria were isolated, out of which 49 were morphologically distinct based on the spore color, mycelia formation and pigment production. The morphologically distinct isolates were characterized and identified using light microscope as Streptomyces sp. (16), Nocardiopsis sp. (8), Kitasatosporia sp. (7), Actinopolyspora sp. (2), Thermoactinomyces sp. (5), Actinomadura sp. (4) Kibdelosporangium sp. (3), Saccharopolyspora sp. (3) and Thermomonospora sp.(1). The correlation coefficient analysis between the isolates and the physicochemical parameters of the soil revealed positive correlation with nitrogen. Silver nanoparticles production by the green chemistry approach was investigated using the isolated marine actinobacteria which showed that 25 isolates out of 49, synthesized silver nanoparticles.

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Section: Resultssupporting

confidence: 57%

Diversity of Silver Nanoparticle Synthesizing Actinobacteria Isolated from Marine Soil, Tamil Nadu, India

et al. 2015

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“…Equally, Actinobacteria play a major part in rhizosphere microbial community in the turnover of recalcitrant plant organic matter, and thus the rhizosphere region is considered as one of the best habitats for isolation of these microorganisms. Priyadharsini et al [6] in her study isolated 45 morphologically distinct colonies from 12 different paddy field soils and observed their ability to inhibit the growth of Cyperus rotundus. The isolates include Streptomyces sp., Streptoverticillium sp., shows that Actinobacteria can become active in freshwater ecosystem in the presence of suitable substrates and conditions for growth rather than specifically adapting themselves to live in such environment.…”

Section: Terrestrial Environmentmentioning

confidence: 99%

An Introduction to Actinobacteria

Ranjani¹,

Dhanasekaran²,

Gopinath³

2016

Actinobacteria - Basics and Biotechnological Applications

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Actinobacteria, which share the characteristics of both bacteria and fungi, are widely distributed in both terrestrial and aquatic ecosystems, mainly in soil, where they play an essential role in recycling refractory biomaterials by decomposing complex mixtures of polymers in dead plants and animals and fungal materials. They are considered as the biotechnologically valuable bacteria that are exploited for its secondary metabolite production. Approximately, 10,000 bioactive metabolites are produced by Actinobacteria, which is 45% of all bioactive microbial metabolites discovered. Especially Streptomyces species produce industrially important microorganisms as they are a rich source of several useful bioactive natural products with potential applications. Though it has various applications, some Actinobacteria have its own negative effect against plants, animals, and humans. On this context, this chapter summarizes the general characteristics of Actinobacteria, its habitat, systematic classification, various biotechnological applications, and negative impact on plants and animals.

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“…Therefore, we suspect that Proteobacteria play an important role during konjac growth. In this study, Actinobacteria represented an important component of the soil microbial population (Poltia et al, 2014) and is used as a biocontrolling agent for controlling soil-and seed-borne plant diseases (Priyadharsini and Dhanasekaran, 2015). Interestingly, some Actinobacteria species gradually appeared or disappeared with the konjac cultivation, suggesting that konjac soil significantly affects the Actinobacteria community.…”

Section: Discussionmentioning

confidence: 70%

Effects of cultivation duration and mode on the microbial diversity of the Amorphophallus konjac rhizosphere

Wu¹,

Jiao²,

Guo³

et al. 2017

Afr. J. Agric. Res.

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Amorphophallus konjac cannot be cultivated on the same field consecutively for extended periods, but can be cultivated on the same grove. The underlying mechanism for this is unknown and may involve the rhizosphere microbial community. Therefore, the different duration and mode for konjac were researched. Polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) showed that microbial communities varied by cultivation duration and mode. Seven bacterial phyla were detected in the soil and Proteobacteria was the most abundant of these phyla. The microbial metabolic diversity following three years of continuous cultivation (sample QXFH3) was the highest, and this sample may have contained pathogenic and antagonistic microorganisms. There was almost no disease in the soil sample from grove conditions (QXN0), which was readily distinguishable from soils from field conditions (QXF0). Amino acids, carboxylic acids, and miscellaneous carbohydrates were the main carbon sources utilized by microbes in these soils. The microbial diversity index and multivariate analyses revealed that bacterial diversity increased with cultivation duration.

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Diversity of soil Allelopathic Actinobacteria in Tiruchirappalli district, Tamilnadu, India

Cited by 24 publications

References 18 publications

Diversity of Silver Nanoparticle Synthesizing Actinobacteria Isolated from Marine Soil, Tamil Nadu, India

Diversity of Silver Nanoparticle Synthesizing Actinobacteria Isolated from Marine Soil, Tamil Nadu, India

An Introduction to Actinobacteria

Effects of cultivation duration and mode on the microbial diversity of the Amorphophallus konjac rhizosphere

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