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Ecotoxicological information

Toxicity to terrestrial plants

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Administrative data

Endpoint:
toxicity to terrestrial plants: short-term
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well-documented study.

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Phytotoxicity of surfactants to higher plants.
Author:
Gunther, P, and Pestemer, W
Year:
1992
Bibliographic source:
Hall, JE, Sauerbeck, DE, Hermite, PL (Eds.), Effects of Organic Contaminants in Sewage Sludge on Soil Fertility, Plants, and Animals. Office for Official Publications of the European Communities, Brussels, Belguim, pp. 103-111.
Reference Type:
other company data
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Three species of crop plant B. rapa, A. sativa, and S. alba, were grown in soil containing concentrations of LAS that varied from 0 -10,000 mg/kg dw soil. The seedlings were grown for 14 days, and then weighed. The weight was compared to weights of controls plants.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): LAS

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

open allclose all
Species:
Avena sativa
Plant group:
Monocotyledonae (monocots)
Details on test organisms:
- Common name: oats
Species:
Brassica rapa
Plant group:
Dicotyledonae (dicots)
Details on test organisms:
- Common name: turnip
Species:
Sinapis alba
Plant group:
Dicotyledonae (dicots)
Details on test organisms:
- Common name: mustard

Study design

Test type:
early seedling growth toxicity test
Study type:
laboratory study
Substrate type:
other: soil, not specified
Total exposure duration:
14 d

Test conditions

pH:
6.1
Moisture:
23.2 g/100 g soil
Details on test conditions:
TEST SYSTEM
- Test container (type, material, size): self-watering pots
- Amount of soil: 70 g

SOURCE AND PROPERTIES OF SUBSTRATE (if soil)
- Soil texture (if natural soil)
- % sand: 54.3
- % silt: 35.7
- % clay: 9.9
- Soil classification system: sandy loam soil
- Organic carbon (%): 1.3
- Maximum water holding capacity (in % dry weigth): 23.2 g/100 g soil


EFFECT PARAMETERS MEASURED (with observation intervals if applicable) : shoot fresh weight at 14 days
Nominal and measured concentrations:
9 concentrations from 0 - 10,000 mg/kg soil

Results and discussion

Effect concentrationsopen allclose all
Species:
Avena sativa
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
80 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Brassica rapa
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
86 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Species:
Sinapis alba
Duration:
14 d
Dose descriptor:
EC10
Effect conc.:
200 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Key result
Species:
Avena sativa
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
300 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Key result
Species:
Sinapis alba
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
300 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Key result
Species:
Brassica rapa
Duration:
14 d
Dose descriptor:
EC50
Effect conc.:
1 641 mg/kg soil dw
Nominal / measured:
nominal
Basis for effect:
growth
Details on results:
There was a steep dose-response curve in all species.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The EC10 for B. rapa was 86 mg/kg dw soil, for A. sativa it was 80 mg/kg dw soil, and for S. alba it was 200 mg/kg soil.
Executive summary:

Three species of crop plant B. rapa, A. sativa, and S. alba, were grown in soil containing concentrations of LAS that varied from 0 -10,000 mg/kg dw soil. The seedlings were grown for 14 days, and then weighed. The weight was compared to weights of controls plants. All three species showed a dose-related reduction in growth. The EC10 for B. rapa was 86 mg/kg dw soil, for A. sativa it was 80 mg/kg dw soil, and for S. alba it was 200 mg/kg dw soil.