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Singh, Punam Kumari
- Studies on Mycoflora and Mycotoxin Infestationin Shorea robusta Gaertn. f
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Indian Forester, Vol 131, No 9 (2005), Pagination: 1227-1234Abstract
Studies were carried out om fungal infestation and mycotoxin contamination in fresh and stored seed samples of Shorea robusta. In fresh samples 5 fungi namely Aspergillus flavus, Alternaria alternata, Cladosporium cladosporioides, Fusarium sp. and Rhizopus sp. Were recorded, whereas in stored samples 9 fungi namely A. flavus, A. alternata, A. niger, C. cladosporioides, Cylindrocladium sp. Phoma sp., Fusarium sp., Penicillium citrinum. and Rhizopus sp. were found associated. The pattern of mycoflora incidence was significantly different in samples from all three sources. Interaction of source and season was significant for all fungi observed in S. robusta. The mycotoxin producing fungi were screened for their toxin producing abilities. The amount of aflatoxin produced by toxigenic isolates was quite high. Aflatoxins were detected in almost all samples analysed for mycotoxin contamination.
- Aflatoxin Induced Biochemical Changes in Edible Seeds of forest Origin
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Indian Forester, Vol 130, No 8 (2004), Pagination: 945-949Abstract
No abstract- Aflatoxin in Aegle marmelos (Linn.) Correa Ex Roxb
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Alternaria alternata, Actinomucor repens, Aspergillus flavus, A. niger, A. ochraceus, Fusarium verticillioides, F. solani, Penicillium citrinum and Rhizopus stolonifer were recorded. The frequency of mycotoxigenic fungi A. flavus, A. ochraceus and P. citrinum was high in the stored fruits of A. marmelos. Thirty six percent of the isolates of A. flavus were found to be toxigenic and the level of aflatoxin B1 ranged from 0.9 . 26.0 μg/ml. The concentration of aflatoxin B1 as natural contaminant was as high as 1.09 μg/g. The concentration of aflatoxin B1 was fairly high in samples of all sources during monsoon. The study demonstrates that A. marmelos fruits are very prone to aflatoxin contamination. There is a need to analyse the samples for their aflatoxin levcl before being consumed or marketed for preparation of indigenous medicines and other edible products.
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Indian Forester, Vol 128, No 11 (2002), Pagination: 1248-1253Abstract
Aegle marmelos fruits are widely used in preparation of indigenous/ayurvedic medicines and different edible products. The fruits collected from different pharmaceutical industries during summer, monsoon and winter seasons were analysed for fungal association and aflatoxin contamination. Nine fungi comprisingAlternaria alternata, Actinomucor repens, Aspergillus flavus, A. niger, A. ochraceus, Fusarium verticillioides, F. solani, Penicillium citrinum and Rhizopus stolonifer were recorded. The frequency of mycotoxigenic fungi A. flavus, A. ochraceus and P. citrinum was high in the stored fruits of A. marmelos. Thirty six percent of the isolates of A. flavus were found to be toxigenic and the level of aflatoxin B1 ranged from 0.9 . 26.0 μg/ml. The concentration of aflatoxin B1 as natural contaminant was as high as 1.09 μg/g. The concentration of aflatoxin B1 was fairly high in samples of all sources during monsoon. The study demonstrates that A. marmelos fruits are very prone to aflatoxin contamination. There is a need to analyse the samples for their aflatoxin levcl before being consumed or marketed for preparation of indigenous medicines and other edible products.
- Mycotoxins Infestation in Buchanania lanzan and Pinus gerardiana Seeds
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Indian Forester, Vol 128, No 4 (2002), Pagination: 421-431Abstract
A total of nine fungi namely Aspergillus flavus, Aspergillus flavus, A. niger, A ochraceus, Curvularia lunata, Fusarium moniliforme, F. pallidoroseum, F. solani, Penicillium citrinum and Rhizopus stolonifer were recorded from the edible kernels of Buchanania lanzan and Pinus gerardiana . A significant variation in pattern of mycoflora incidence was observed in terms of source and season. Fungal infestation in-both the substrates was highest during monsoon. Aflatoxins were the most common mycotoxins elaborated by different isolates of A. flavus obtained from B. lanzan and P.gerardiana . The amount of aflatoxins produced by the toxigenic isolates of A. flavus was in the range of 0.8-17.5 μg/ml in P.gerardiana and 0.65-13.2 μg/ml in B. lanzan . The percentage toxigenicity was comparatively lower in the isolates of other mycotoxigenic fungi. Aflatoxins were detected almost in all the samples analyzed for mycotoxin contamination.- Mycoflora and Mycotoxins in Medicinal Fruit/Seed of Forestry Origin
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Indian Forester, Vol 127, No 7 (2001), Pagination: 770-776Abstract
Fruit/seed of seven medicinal plants namely Aegle marmelos, Azadirachta indica, Emblica offit;inalis, Plantago ouata, Terminalia bellirica, T. chebula and Vitex negundo were examined for their susceptibility to mould invasion and elaboration of mycotoxins. Fifteen fungi were found associated with seed samples. 23-40% of the isolated fungi were species of Aspergillus, Fusarium and Penicillium. The strains of A. flavus thus obtained were screened for aflatoxin producing potential. It was found that almost 30% of these isolates elaborated aflatoxin. Natural occurrence of aflatoxin contamination was also determined in these medicinal seeds. Aegle marmelos was found to be most suitable substrate for elaboration of aflatoxins whereas no traces of aflatoxin were detected in P. ovata.- Methanol Fumigation - an Effective Control for Seed Mycoflora
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Indian Forester, Vol 127, No 9 (2001), Pagination: 1064-1066Abstract
No abstract- Mycotoxin Producing Potential of Seed Mycoflora of some forest Trees
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