Identification and Characterization of Rubber Degrading Actinobacteria

Rifaat, Hala M.

doi:10.15666/aeer/02063070

Cited by 17 publications

(8 citation statements)

References 14 publications

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“…The chemical composition of latex is very complex, it contains (wt/wt) natural rubber poly (cis-1, 4-isoprene) 25 to 35%, which consider the main constituent of Natural rubber latex, and it is consisting of isoprene units C 5 H 8 in the cisconfiguration, a highly unsaturated hydrocarbon, with an average molecular weight about 10 6 Da [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Natural Rubber Latex of Calotropis procera by Two Endophytic Fungal Species

Mohamed¹,

Ismail²,

Abdel‐Mageed³

et al. 2017

J Bioremediat Biodegrad

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IntroductionCalotropis is a small genus belonging to family Asclepiadaceae, Calotropis gigantea and C. procera are the two most common species in this genus used in traditional medicine, and only these two species are usually reported in literature [1], and are distributed in tropical and subtropical Africa, Asia, and America [2][3][4][5].Calotropis procera (Ait) WT Aiton is a small wild-growing tropical plant, known by different names like sodom apple, usher, dead sea apple, swallow wort, and milk weed [6,7]. All parts of this plant have the ability to produce large quantities of latex when cut or broken [7][8][9].The plant latex could be separated after centrifugation into three layers: top layer containing Natural Rubber; middle layer of serum, and the bottom layer of lipids [9,10]. The chemical composition of latex is very complex, it contains (wt/wt) natural rubber poly (cis-1, 4-isoprene) 25 to 35%, which consider the main constituent of Natural rubber latex, and it is consisting of isoprene units C 5 H 8 in the cisconfiguration, a highly unsaturated hydrocarbon, with an average molecular weight about 10 6 Da [11][12][13].Natural Rubber is a basic material for manufacturing tires, latex gloves, condoms, seals, balloons, balls for sports and many other things [14]. Degradation potential of the microorganism is dependent upon colonization on natural rubber and accompanied by a loss in the weight of the rubber hydrocarbon and a decline in the relative viscosity of the polymer solution [13].Many other reports have been published on the biodegradation of natural rubber hydrocarbon as a sole carbon source by bacteria [15][16][17][18][19][20][21][22], fungi [13,23,24]. Several microbes were used to biodegrade Calotropis Procera latex [25,26].The aim of this work is to assess the ability of mesophilic endophytic fungi isolated from Calotropis procera leaves and latex on sugar-free Czapek agar and to test their ability to metabolize and degrade rubber latex of C. procera as a sole carbon source. AbstractIn this study eight species related to Aspergillus (3 species), Fusarium (1), Penicillium (1), Emericella (1), Nigrospora (1) and trichoderma (1) were isolated from leaves and latex of Calotropis procera. Only P. chrysogenium and A. niger were able to grow on natural rubber but other species were not. The degrading ability of (Penicillium chrysogenum and Aspergillus niger), isolated from latex of calotropis procera was assessed. The degradation of rubber latex was determined by measuring the increase in protein content of the fungus (mg/g dry wt), reduction in molecular weight (g/mol) and inherent viscosity (dl/g) of the latex. Moreover, the degradation was also confirmed by observing the growth of these species strain using scanning electron microscopy.

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Section: Introductionmentioning

confidence: 99%

Biodegradation of Natural Rubber Latex of Calotropis procera by Two Endophytic Fungal Species

Mohamed¹,

Ismail²,

Abdel‐Mageed³

et al. 2017

J Bioremediat Biodegrad

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“…In ecological research we can distinguish three main trends [14]: describing synbiological patterns and trying to explore their background patterns [22][32] [37] [38][40] [41]; focusing on some alternative hyphoteses of a hyphoteses system through firmly controlled experiments [4] [35] [36]; and theoretical modelling by mathematical description, when only a fragment of the available knowledge is used [15] [26]. These approaches have many advantages, but one of their disadvantage is that it limits the systems complexity.…”

Section: Introductionmentioning

confidence: 99%

Graph Theory Applicatio N for Investigating Agroecosystems Effected by Extrem Weather Conditions

Erdélyi¹

2006

Appl Ecol Env Res

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Abstract. An agro-ecosystem is directed by the interactions among the populations living in it and depending on many abiotic factors. It is needed to investigate as many factors as possible. People are also interested in the effects of predicted climate change, experienced climate variability and frequently present extremal weather conditions nowadays. Elements of the system have direct and indirect influence on each other. Indirect or hidden types of interactions can not be expressed as different kinds of material flow. It would be also nice to combine the optimalisation of the proficiency and environmental protection together with the forecast risk, damages and profit. When extending the already existing models, they become more complex and immense, so simulation and monitoring are not enough for examining and describing the whole interaction process. Application of graph theory -using well known graph theory theorems and having the help of computers -is especially powerful for controlling huge systems that are difficult to survey by other existing methods. Using informatics and electronics agricultural production can be controlled through a complex system, which integrates biological, technological and economical factors.

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“…Field ecologists who start from the observation of real natural processes are striving during their examinations to cause the less disturbation to these processes [94,115,159,176]. Their task is the prejudication-free description of synbiological patterns and in the possession of these precise descriptions (data series and tables) they try to explore the affecting factors (or to be more precise: their background patterns) generating the observed patterns.…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Seasonal Dynamic Pattern Analysis in Service of Climate Change Research a Methodical Case-Study — Monitoring and Simulation Based on an Aquatic Insect Community

Hufnágel¹

2005

Appl Ecol Env Res

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Abstract. Our aim was to approach an important and well-investigable phenomenon -connected to a relatively simple but real field situation -in such a way, that the results of field observations could be directly comparable with the predictions of a simulation model-system which uses a simple mathematical apparatus and to simultaneously gain such a hypothesis-system, which creates the theoretical opportunity for a later experimental series of studies. As a phenomenon of the study, we chose the seasonal coenological changes of aquatic and semiaquatic Heteroptera community. Based on the observed data, we developed such an ecological model-system, which is suitable for generating realistic patterns highly resembling to the observed temporal patterns, and by the help of which predictions can be given to alternative situations of climatic circumstances not experienced before (e.g. climate changes), and furthermore; which can simulate experimental circumstances. The stable coenological state-plane, which was constructed based on the principle of indirect ordination is suitable for unified handling of data series of monitoring and simulation, and also fits for their comparison. On the state-plane, such deviations of empirical and model-generated data can be observed and analysed, which could otherwise remain hidden.

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Identification and Characterization of Rubber Degrading Actinobacteria

Cited by 17 publications

References 14 publications

Biodegradation of Natural Rubber Latex of Calotropis procera by Two Endophytic Fungal Species

Biodegradation of Natural Rubber Latex of Calotropis procera by Two Endophytic Fungal Species

Graph Theory Applicatio N for Investigating Agroecosystems Effected by Extrem Weather Conditions

Seasonal Dynamic Pattern Analysis in Service of Climate Change Research a Methodical Case-Study — Monitoring and Simulation Based on an Aquatic Insect Community

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