Registration Dossier

Ecotoxicological information

Toxicity to terrestrial plants

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

From the database of chronic cobalt toxicity to higher plants, there are 83 individual high quality NOEC(L)/EC10 values for various endpoints (shoot yield, shoot length, root yield, root length) for 7 different species exposed to a variety of natural soils from Europe and North America and laboratory-derived artificial soils. When expressed as total soil Co, these range from 3.2 mg Co/kg dw for Medicago sativa (Kapustka and Eskew, 2000) to 647 mg Co/kg dw for Hordeum vulgare (Li et al, 2007). Below are the accepted high quality studies for terrestrial plants used for derivation of the HC5 and terrestrial PNEC.

 

Table X. High quality studies for terrestrial plants used for derivation of the HC5 and terrestrial plant PNEC

Selected values for the most sensitive endpoints used for derivation of the terrestrial plant HC5

Key study
  

Species

Added NOEC or EC10

(mg Co/kg dw)

Total NOEC or EC10

(mg Co/kg dw)

 

R. sativa (radish)

8.5 -450

8.8 -453

  Velicogna et al., 2010; Kapustka and Eskew, 2000

E. labceolatus (northern wheatgrass)

 

41.4 -521

 

44.4 -524

Velicogna et al., 2010 

L. esculentum (tomato)

8.00 -423

9.5 -426

  Li et al., 2007; Velicogna et al., 2010

T. pratense (red clover)

90.1 -513

93.1 -516

  Velicogna et al., 2010

H. vulgare (barley)

9.00-617

10.8-647

  Li et al., 2007; Mico et al, 2008; Lock et al., 2007; Kaputska and Eskew, 2000

B. napus (oil seed rape)

17.0-102

18.5-113

  Li et al., 2007

M. sativa (alfalfa)

2.9 -13.7

3.2 -21.3

  Kapustka and Eskew, 2000

Long-term EC10/LC10 or NOEC for terrestrial plants: 2.9 -617 mg/kg soil dw (added Co).