Browsing by Author "Deeba Kamil"

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Exploring Potent Fungal Isolates from Sanitary Landfill Soil for In Vitro Degradation of Dibutyl Phthalate
(MDPI, 2023) Shriniketan Puranik; Livleen Shukla; Aditi Kundu; Deeba Kamil; Sangeeta Paul; Govindasamy Venkadasamy; Rajna Salim; Sandeep Kumar Singh; Dharmendra Kumar; Ajay Kumar
Di-n-butyl phthalate (DBP) is one of the most extensively used plasticizers for providing elasticity to plastics. Being potentially harmful to humans, investigating eco-benign options for its rapid degradation is imperative. Microbe-mediated DBP mineralization is well-recorded, but studies on the pollutant’s fungal catabolism remain scarce. Thus, the present investigation was undertaken to exploit the fungal strains from toxic sanitary landfill soil for the degradation of DBP. The most efficient isolate, SDBP4, identified on a molecular basis as Aspergillus flavus, was able to mineralize 99.34% dibutyl phthalate (100 mg L−1) within 15 days of incubation. It was found that the high production of esterases by the fungal strain was responsible for the degradation. The strain also exhibited the highest biomass (1615.33 mg L−1) and total soluble protein (261.73 µg mL−1) production amongst other isolates. The DBP degradation pathway scheme was elucidated with the help of GC-MS-based characterizations that revealed the formation of intermediate metabolites such as benzyl-butyl phthalate (BBP), dimethyl-phthalate (DMP), di-iso-butyl-phthalate (DIBP) and phthalic acid (PA). This is the first report of DBP mineralization assisted with A. flavus, using it as a sole carbon source. SDBP4 will be further formulated to develop an eco-benign product for the bioremediation of DBP-contaminated toxic sanitary landfill soils. © 2023 by the authors.
Sporidesmium binserum sp. nov. from Binser forest of Almora, Himalaya, India
(Springer, 2018) Manish Kumar Dubey; Ram Sanmukh Upadhyay; Deeba Kamil; Ramesh Chandra Gupta
A new and interesting species of Sporidesmium was discovered during a survey of plant debris inhibiting litter decomposing microfungi in Binser forest, Almora, Uttarakhand, India. This new species, Sporidesmium binserum sp. nov., a dematiaceous hyphomycete was found on decaying leaf litter of the host plant Quercus leucotrichophora (oak). The key features of special interest that distinguish it from other morphologically similar species of Sporidesmium are macronematous, mononematous, percurrent proliferations towards the end in the flexuous multiseptate conidiophores with obtuse tip having distinctively curved, fusiform to subfusiform, 3-septate conidia, consist of 3 cells, second cell dark brown with slightly or distinctly constricted at the septa, tip cell of conidia highly curved and/or twisted, mostly flat and conic-truncated ends at base due to schizolytic secession. The conidial maturation is presumably synchronous with conidial ontogeny. Based on these features, the specimen is proposed here as a new species. Apart from it, a note on the current status of Sporidesmium sensu lato in India is also provided. © 2018, Indian Phytopathological Society.