Growth and hydrocarbon degradation by three desert fungi under conditions of simultaneous temperature and salt stress

Obuekwe, C. O.; Badrudeen, Adekunle M.; Al-Saleh, Eyad; Mulder, J. L.

doi:10.1016/j.ibiod.2005.05.005

Cited by 52 publications

(17 citation statements)

References 20 publications

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“…There was a lag phase in growth 72 h and pigment production started only at 120 h, whereas in control, growth was evident at 24 h and pigment production at 48 h onwards. The generalized nature of inhibition pattern in growth under salt stress was in agreement with the results of Alder et al (1985), Larsson andGusfafsson (1993), Neves et al (1997), Obuekwe et al (2005). It is known that microorganisms under stress are less efficient in the conversion of substrates into microbial biomass synthesis (Bardgett and Saggar 1994).…”

Section: Resultssupporting

confidence: 88%

Effect of stress on growth, pigment production and morphology of Monascus sp. in solid cultures

Babitha

Soccol

Pandey

2007

J. Basic Microbiol.

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The aim of the current work was to study the influence of stress on pigment production in Monascus purpureus under solid-state fermentation. Thermal stress was induced by incubating the culture at various high temperatures. For giving osmotic stress, different concentration of NaCl and glycerol were added to the solid substrate prior to autoclaving. Morphological studies were done by light microscopy and scanning electron microscopy. When the cells were exposed to high temperature, high glycerol and salt concentration, significant changes in pigment production and growth were observed. High temperature (>45 degrees C) induced the production of more yellow pigments. High concentration of NaCl induced conidiation and caused a decrease in fungal biomass (up to 50%) but red pigment production increased from 11.86 OD/gds to 20.14 OD/gds. When subjected to glycerol stress, a significant increase in aerial mycelia was observed when compared with the control conditions. The results attain significance for exploiting the fungal culture of Monascus purpureus LPB 97 for producing colors of choice--red, or yellow, or increasing the yield of red pigments considerably. Thus, these results could well impact the commercial aspect of Monascus pigments for industrial application.

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Section: Resultssupporting

confidence: 88%

Effect of stress on growth, pigment production and morphology of Monascus sp. in solid cultures

Babitha

Soccol

Pandey

2007

J. Basic Microbiol.

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“…F092 is also able to degrade chrysene as it was only known for certain fungi that previously recorded (Matsubara, 2006;Juan et al, 2008;Harayama, 1997). More over, increased salinity decreases the degradation of the number or type of substrate and the ability of some microorganisms (Sing, 2006;Obuekwe, 2005). In addition, biodegradation by microorganisms in the present salinity was slow, because this environment tends to disrupt cell membrane, denature some proteins, change osmotic force which any of these situation could be lethal (Woolard & Irvine, 1994;Kargi & Dinçer, 2000).…”

Section: Results and Discussion Screening And Isolating Fungimentioning

confidence: 89%

Simple Screening for Potential Chrysene Degrading Fungi

Hidayat¹,

Tachibana

2015

KLS

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Chrysene is a class of organic compounds, arranged in four benzene rings, and a polycyclic aromatic hydrocarbon (PAH), It has been found to have a variety of toxicity, mutagenicity, teratogenicity, and carcinogenicity on microorganisms, plants and animals in environment. Nowadays, the most attention on degradation of PAHs is investigating degradation of high-molecular-weight molecules. However, microbes which have ability to degrade PAHs containing more than three benzene rings are more difficult to be obtained. In order to provide chrysene degrading fungi, this study was conducted for screening, and isolating the fungi from soil, and hence investigating the selected fungi having high chrysene degradation activity. From the 62 soil samples collected from Matsuyama-Japan, 92 isolates were found and 20 isolates of them grew well in Malt extract media contaminated with chrysene (covered up 90%). Among them, a fungus, Fusarium sp. has the highest activity to degrade chrysene compared to others screened fungi. This fungus was evaluated further on liquid medium from distilled water and sea water to confirm their validity in degrading chrysene. The result showed that Fusarium sp. F092 degraded 48% of chrysene, where the chrysene degradation showed no differences at salinity of 35 o / oo . The effect of variation of enzymes activities on incubation times was evaluated simultaneously. When the fungus was grown in a liquid culture, the highest activity of 1,2-dioxygenase reached 203.5 UL -1 were observed on 30 days incubation and 29.7 Ul -1 for 2,3-dioxygenase on 40 days incubation. The products of chrysene degradation by Fusarium sp. F092 are, 1-hydroxy 2-napthoic acid and catechol. In conclusion, Fusarium sp. F092 shows a high potential activity degrade PAHs contamination .

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“…The utilization of n-alkanes by yeast as a sole carbon and energy source has been reviewed by Obuekwe et al (2005) and Ashraf and Ali, (2006). In many reports, bacteria have been identified as more efficient crude oil degraders than yeast.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain

Farag

Soliman

2011

Braz. arch. biol. technol.

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Growth and hydrocarbon degradation by three desert fungi under conditions of simultaneous temperature and salt stress

Cited by 52 publications

References 20 publications

Effect of stress on growth, pigment production and morphology of Monascus sp. in solid cultures

Effect of stress on growth, pigment production and morphology of Monascus sp. in solid cultures

Simple Screening for Potential Chrysene Degrading Fungi

Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain

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