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Ecotoxicological information

Toxicity to soil microorganisms

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Administrative data

Endpoint:
toxicity to soil microorganisms
Adequacy of study:
other information
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Very few experimental information. It seems that the description and the results of this experiment come from an other scientific article

Data source

Reference
Reference Type:
review article or handbook
Title:
Significance and application of microbial toxicity tests in assessing ecotoxicological risks of contaminants in soil and sediment.
Author:
Van Beelen P. and Doelman P.
Year:
1997
Bibliographic source:
Chemosphere 34 (3) : 455-499

Materials and methods

Principles of method if other than guideline:
This review gives an evaluation of microbial toxicity tests and a novel method to derive quality guidelines.
no more data
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
no data

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

Test organisms (inoculum):
soil

Study design

Remarks:
no data

Test conditions

Details on test conditions:
Method/ Guideline followed (experimental/ calculated) : Information not available
Test type : The assay determined the percentage of strains of bacteria sensitive or resistant to Cd or Zn able to grow on various organic substrates
Species/ Strain : Cd sensitive and resistant bacteria and Zn sensitive and resistant bacteria
Test organisms : Cd sensitive and resistant bacteria and Zn sensitive and resistant bacteria from a sandy soil
Test Conditions : Information not available
End-point : Percentage of strains able to grow on the substrate
Test design (number of replicates, individuals per replicate, concentrations (static/ semistatic)) :
    - Number of strains of bacteria Cd-sensitive tested: 93
- Number of strains of bacteria Cd-resistant tested: 64
-  Number of strains of bacteria Zn-sensitive tested: 84

Results and discussion

Reported statistics and error estimates:
no data

Any other information on results incl. tables

Strains able to grow on the substrate 

  Cd-sensitive  Cd-resistant  Zn-sensitive  Zn-resistant
 Salicylic acid  16 %  16 %  17 %  5 %
 Mean of 23 various substrates  8.7 %  4.3 %  9.4 %  2.6 %


Applicant's summary and conclusion

Conclusions:
It appears that Salicylic acid can be considered as a "good" organic substrate for bacteria.
Indeed, the percentage of bacteria able to grow on this substrate is higher than the mean obtained for the 23 substrates.