Rhodanese activity of flooded and nonflooded soils

• Published in: Soil biology & biochemistry 1985, Vol.17 (2), p.159-162
• Main Authors: Ray, Ramesh C., Behera, N., Sethunathan, N.
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Chemical, physicochemical, biochemical and biological properties; flooded land; Fundamental and applied biological sciences. Psychology; Oryza sativa; paddy soils; Physics, chemistry, biochemistry and biology of agricultural and forest soils; rhizosphere; soil biology; soil enzymes; Soil science; thiosulfate sulfurtransferase
• ISSN: 0038-0717; 1879-3428
• DOI: 10.1016/0038-0717(85)90108-7

Rhodanese activity (RA) was studied in 4 soils, incubated under flooded and nonflooded (60% water-holding capacity) conditions. RA in 3 soils including an acid sulphate soil pokkali increased 2.5–6.0-fold (over respective nonflooded soils), while activity of the enzyme decreased markedly in flooded alluvial soil. Similarly, anaerobic incubation of nonflooded soils under N 2 decreased RA in an alluvial soil, but increased it in pokkali soil. RA was negligible in soils, that had been reduced by flooding for 30 days and then sterilized by autoclaving. Rice rhizosphere soil exhibited significantly higher RA than the nonrhizosphere soil samples under flooded or nonflooded conditions. RA in aerobic soils was related to the microbial oxidation of S° to SO 2− 4. But, no relationship could be established between RA and S-oxidation in flooded soils and in rhizosphere soil suspensions of flooded rice plants.