Influence of environmental parameters on pentachlorophenol biotransformation in soil by Lentinula edodes and Phanerochaete chrysosporium

Abstract

The influences of temperature, soil moisture potential and initial pH on the biotransformation of pentachlorophenol (PCP) by the lignicolous fungi Lentinula edodes and Phanerochaete chrysosporium were examined. At 10 degrees C, L. edodes was more effective in degrading PCP (P < 0.05) than P. chrysosporium. At 15 degrees C similar results were obtained for the two fungi. The highest levels of degradation occurred for both fungi at 25 degrees C. With P. chrysosporium, the extent of PCP elimination was directly related to soil moisture content and optimal at approximately 47%. With L. edodes, in contrast, the process was inversely related to moisture content and maximal at 26%. The initial soil pH also had a marked influence, and pH 4.0 was optimal for both fungi.

Heterologous Expression of Manganese Peroxidase in Aspergillus niger and Its Effect on Phenanthrene Removal from Soil

“…However, growth of this fungus and production of the ligninolytic enzymes in the soil environment proves to be difficult, and its efficiency is diminished because the soil is not its natural habitat. This fungus generally colonizes plant material and agro-industrial wastes and does not grow in soil due to competition with autochthonous microbial communities and environmental factors that are not ideal for their growth [Capotorti et al, 2004;Duran and Esposito, 2000;McErlean et al, 2006;Okeke and Agbo, 1996]. The use of native microbiota from soil for bioremediation systems is of great interest as these microorganisms would be expected to be more adapted to the particular soil environment than non-indigenous commercial microbial agents.…”

Changes to water repellence of soil caused by the growth of white-rot fungi: studies using a novel microcosm system

“…Bioremediation of xenobiotics using the white-rot fungi Phanerochaete chrysosporium and Coriolus versicolor has been extensively researched and applied in ¢eld studies with varying e¤cacy (e.g. [11,12]). The suitability of such applications has often been restricted by a scarcity of information relating the growth and activity of these organisms to the heterogeneous soil environment.…”

Phyto-Microbial Degradation of Glyphosate in Riyadh Area

“…Which suggests that in bioremediation both the inoculant organisms and the native soil microflora are affected by water potential fluctuations. Matric potential influences the physiological activity of soil microorganisms [13] and different fungi may have optimal biodegradation rates at different water availabilities, as reported by Okeke, et al [47]. Bacterial bioremediation is subject to the prevailing temperature, moisture and soil conditions [60].…”

“…Plant beneficial interactions can be divided into three categories [46,47]. Detrimental interactions within the rhizosphere involve deleterious rhizobacteria which inhibit shoot or root growth without causing any other visual symptoms by the production of phytotoxins such as or phytohormones [48].…”