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Evidence of the biological origin of soil fungistasis


, : Evidence of the biological origin of soil fungistasis. Zeitschrift fuer Pflanzenkrankheiten und Pflanzenschutz 89(7): 427-434

Soil fungistatic activity against Verticillium dahliae was studied in relation to soil depth and other soil factors. The fungistatic effect was reduced as the soil depth increased; this seems to be related to the poor organic matter, moisture content and lesser microbial activity observed with an increase in soil depth. The fungistatic factor was destroyed by autoclaving the soil but it reappeared with the inoculation of micro-organisms to the soil. Hydrocarbons (i.e., ethylene and methane) were detected in 3 soil types tested by gas chromatography. The top soil, which is rich in organic matter content and in microflora, exhibited greater fungistatic effect and also produced greater amounts of ethylene. The amounts of the hydrocarbons produced are also found to differ at different temperatures and to vary with season. Ethylene and methane were detected as metabolic products of soil micro-organisms, indicating their possible involvement in soil fungistasis.

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Related references

Dutta, B.K.; Ramarao, P.; Isaac, I., 1982: Evidence on the biological origin of soil fungistasis. Soil fungistatic activity (against Verticillium dahliae) diminished with increasing depth in the soil; this seemed to be related to the lower organic matter, moisture content and microbial activity observed with depth. The fungistatic factor disap...

Dutta, B.; Ramarao, P1; Isaac, I., 1982: Evidence on the biological origin of soil fungistasis against Verticillium dahliae. Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz = Journal of plant diseases and protection 89(7): 427-434

Kanaujia, R.S., 1975: Observations on soil fungistasis. Part 4. Fungistasis in relation to soil types, soil amendments and physico-chemical characters of the soils. In fifteen profiles of nine soil types, marked fungistasis was associated with high fungal populations. Samples from usar land, however, showed marked fungistasis in the absence of abundant fungi. Amendment of samples with organic matter, inorgani...

Mishra, R.R.; Kanaujia, R.S., 1973: Observations on soil fungistasis part 3 fungistasis in relation to soil depths seasonal changes soil amendments and physicochemical characteristics of the soils. Plant and Soil 38(2): 321-330

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Pandey, Kk, 1977: Investigations on the soil fungistasis II. Evaluation of fungistasis in unsterilised and sterilised soil amended with plant root extract. Acta botanica Indica: 5 (1) 78-80

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Mishra, R.; Pandey, K., 1975: Studies on soil fungistasis. IV. Effect of physico-chemical characters and soil fungal flora on fungistasis

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Hora, T.S., 1970: Origin of soil fungistasis