• D K Sandhu

      Articles written in Proceedings – Plant Sciences

    • Growth response of some thermophilous fungi at different incubation temperatures

      S Singh D K Sandhu

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      Growth response of 21 thermophilous fungi at 10 different temperatures from 15–62° C has been studied. These fungi could be categorized into three groups, i.e., microthermophiles, thermotolerant and true thermophiles. The temperature relations of 6 thermophilous fungi namelyAspergillus tamarii, A. terreus var.aureus (microthermophiles),A. nidulans var.echinulatus A. viridi-nutans, A. fumigatus var.ellipticus andA. caespitosus (thermotolerant) are being reported for the first time. The growth rates of different fungi varied from 0·19–1·25 mm/hr at their optimum temperatures.Penicillium sp. the slowest andThermoascus sp. were the fast growing fungi.

    • Survey of some Indian soils for laccase producing fungi and their lignin degrading ability

      D S Arora D K Sandhu

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      One hundred and fifty soil samples collected from three climatologically different sites were screened for laccase production using lignin-guaiacol agar plates. All the 12 fungi isolated excepting one gave positive test for qualitative lignin degradation. Five fungi were selected further for quantitative study of wood/lignin degradation. The basidiomycetes proved to be better laccase producers and decomposers of wood/lignin. These gave comparable results to a known white-rot fungus,Polyporus versicolor (L.) Fr. and degraded wood sawdust causing a total weight loss of 7–8% and lignin loss up to 10% in 30 days.

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