Rhizosphere Microbes Interactions in Medicinal Plants

Solaiman, Zakaria; Anawar, Hossain M.

doi:10.1007/978-3-319-13401-7_2

Cited by 17 publications

(12 citation statements)

References 95 publications

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“…It has therefore become increasingly important to investigate the bacterial community of unprocessed plant foods such as fresh herbs. To date, little is known about the microbial community of fresh herbs and its development, whereas many studies have investigated properties of various fresh herb ingredients like essential oils or have focused on the plants' rhizosphere (Kapoor and Mukerji 2006;Tamilarasi et al 2007;Bafana 2013;Solaiman and Anawar 2015). In order to understand the bacterial community development of fresh herbs' phyllosphere, it is important to analyse their production environment, which shapes the plant host's bacterial community (Knief et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of culturable mesophilic bacterial communities of three fresh herbs and their production environment

et al. 2017

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Aim: Investigate dynamics of culturable mesophilic bacteria and selected foodcontaminating bacteria from three herbs and their production environment. Methods and Results: Marjoram, basil and thyme were investigated during one growing season by sampling plants, organic fertilizers, soil, irrigation water and marketed products. Mesophilic bacteria and selected food-contaminating bacteria (Escherichia coli, Enterococcus spp., Bacillus cereus group) were cultured and identified by MALDI biotyping. Culturable mesophilic bacteria on marjoram and basil plants decreased over time by two orders of magnitude starting at above 10 6 colony forming units per gram (CFU per g), while they remained constant on thyme (~10 4 CFU per g). Compared to the last field sample, mesophilic bacteria were increased on all market-ready products by one order of magnitude. Marjoram and basil were dominated by B. cereus group, Enterobacter spp. and Pseudomonas spp., thyme by Bacillus spp. and Pseudomonas spp. All selected food-contaminating bacteria were detected in soil and reservoir-sourced irrigation water, whereas in municipal water, only B. cereus group and rarely Enterococcus spp. were found. Escherichia coli was detected only on young marjoram and basil plants (5 9 10 2 and 5 9 10 1 CFU per g, respectively), whereas Enterococcus spp. and B. cereus group were consistently detected on these two herbs. Thyme plants only contained B. cereus group consistently (above 10 3

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Section: Introductionmentioning

confidence: 99%

Dynamics of culturable mesophilic bacterial communities of three fresh herbs and their production environment

et al. 2017

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“…The plants which have medicinal properties as antimicrobial, antipyretic, anti-cancerous etc., are termed as medicinal plants 2 . Medicinal plants are thought to be safe to human beings and the environment compared to the synthetic medicines for the treatment of many diseases 3 . In past research was focused on bioactive phytochemicals but there is also a significant number of antimicrobial compounds produced by associated microbes as endophytic and rhizospheric microbes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Antimicrobial Potential of Rhizospheric Soil Fungi Isolated From Tinospora Cordifolia, Mentha Arvensis and Ocimum Tenuiflorum Medicinal Plants

Geetanjali¹,

Jain²,

Kumar³

2016

Int. Res. J. Pharm.

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Apart from producing phytohormones, plant associated microbes like rhizospheric microbes are also found to be the producers of pharmaceutically active compounds. The rhizosphere is a narrow region around plant roots, a hot spot for diverse and active population of soil microbes where various ecological and biological complex interactions occur. Medicinal plants harbour a distinctive microbiome in their rhizosphere due to their unique and structurally divergent bioactive secondary metabolites that are most likely responsible for the high specificity of the associated microbes. In the present investigation, fungi were isolated from rhizosphere of three medicinal plants Tinospora cordifolia, Mentha arvensis and Ocimum tenuiflorum of Kurukshetra and some nearby districts and screened for antimicrobial activity by agar well diffusion method. Out of 10 fungal isolates, TF1 isolate was found to be potent antimicrobial metabolite as showed highest activity against all bacteria and yeast pathogens. The Minimum inhibitory concentration calculated by agar dilution method showed that Minimum Inhibitory Concentration of yellow oily metabolite extracted by ethyl acetate by solvent extraction method was 0.039mg/ml against Pseudomonas aeruginosa, Escherichia coli, Streptococcus pyogenes and Candida albicans. According to microscopic examination TF1 fungal isolate was found to belong to Aspergillus species. The potent isolate could be exploited for optimization of various parameters like pH, temperature, carbon and nitrogen sources etc. to increase the yield of metabolite.

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“…Suppose S(t) is the organic concentration of the rhizosphere and x 1 (t) is the concentration of the inoculation microorganism. x 2 (t) denotes the concentration of the indigenous microorganism at time t. Based on the references [1][2][3][4][5][6][7][8][9][10][11][12][13][14] and the principle of chemostat model [15][16][17][18], the following mathematical model is established:…”

Section: Development Of the Model And Preliminariesmentioning

confidence: 99%

“…It has long been recognized the rhizosphere contains the abundant rhizosphere microbes such as bacteria, fungi, protozoa and nematodes, which can make an important contribution to decomposition of the contaminants [1]. Since the rhizosphere microbe is easily affected by multiple factors including environmental parameters, physiochemical properties of the soil, biological activities of the plants and chemical signals from the plants and bacteria which inhabit the soil adherent to root-system [2], many researchers [3][4][5][6] tried to simulate the degradation process by using all kinds of mathematical models.…”

Section: Introductionmentioning

confidence: 99%

Mathematical model for diffusion of the rhizosphere microbial degradation with impulsive feedback control

Zhao

Chen

et al. 2020

Journal of Biological Dynamics

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Considering the rhizosphere microbes easily affected by the environmental factors, we formulate a three-dimensional diffusion model of the rhizosphere microbes with the impulsive feedback control to describe the complex degradation and movement by introducing beneficial microbes into the plant rhizosphere. The sufficient conditions for existence of the order-1 periodic solution are obtained by using the geometrical theory of the impulsive semi-dynamical system. We show the impulsive control system tends to an order-1 periodic solution if the control measures are achieved. Furthermore, we investigate the stability of the order-1 periodic solution by means of a novel method introduced in the literature [Y. Ye, The Theory of the Limit Cycle, Shanghai Science and Technology Press, 1984.]. Finally, mathematical results are justified by some numerical simulations.

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Rhizosphere Microbes Interactions in Medicinal Plants

Cited by 17 publications

References 95 publications

Dynamics of culturable mesophilic bacterial communities of three fresh herbs and their production environment

Dynamics of culturable mesophilic bacterial communities of three fresh herbs and their production environment

Evaluation of Antimicrobial Potential of Rhizospheric Soil Fungi Isolated From Tinospora Cordifolia, Mentha Arvensis and Ocimum Tenuiflorum Medicinal Plants

Mathematical model for diffusion of the rhizosphere microbial degradation with impulsive feedback control

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