Dynamics of residual enzyme activities, denitrification potential, and physico-chemical properties in a γ-sterilized soil

Plant-Soil-Microorganism Interactions on Nitrogen Cycle: Azospirillum Inoculation

“…This result might be explained if the fact that the inoculated strain does not have indigenous microbial competitor in the irradiated soil is accepted. As reported by other authors (Cawse, 1975;Lensi et al, 1991), in the soil sterilized by gamma radiation there is a significant increase in soluble organic carbon and in ammonium ion content. In this situation, the availability of these easily assimilative sustrates and the absence of microbial competitors may have produced the significant growth of the strain introduced.…”

Environmental conditions rather than microbial inoculum composition determine the bacterial composition, microbial biomass and enzymatic activity of reconstructed soil microbial communities

“…Various enzymes have been shown to resist irradiation, and their location has been suggested to be factor in this resistance (Lensi et al, 1991). In general, different enzymes have different sensitivity to gamma rays (Shih and Souza, 1978); therefore, the activity of each enzyme would vary to a different degree in soil irradiated with 60 kGy gamma irradiation.…”

Variation of the distribution coefficient (Kd) of selenium in soils under various microbial states

“…This method was chosen for its efficiency and because it left no chemical contamination post-treatment (Lotrario et al, 1995). The sterilised soil was stored for 2 months before use in order to stabilise it and to eliminate all enzyme activities (Lensi et al, 1991). All selenite solutions used in this condition were filtered with 0.2 mm polyethersulfone filters prior to their addition to the soil.…”