Agriculture Reference
In-Depth Information
TableĀ 8.6 Effects of the Cultivation of Bt Crops or Amendment with Bt Protein on Nematodes (continued)
Organism/activity
tested
Bt crop plant/
experimental variable
Methodology
Study location
Protein
Effect on organism(s)
Source
C. elegans
Bioassay
Laboratory
Rhizosphere and bulk
soil cultivated with Bt
maize (MON810)
Trypsinized CrylAb
protein expressed in
Escherichia coli
Cry1Ab
Reproduction and
growth reduced in
rhizosphere and bulk
soil of Bt maize;
reductions correlated
with concentrations of
the CrylAb protein
Hoess et al.
(2008)
Heligmosomoides bakeri
Bt protein
injected into
mice infected
with H. bakeri
Laboratory
Spore crystal lysates
Cry5B
98% reduction in
nematode egg
production in vivo
Hu et al.
(2010)
Meloidogyne javanica
Eggs and juveniles
exposed to
different Bt
isolates at 50%
concentration of
cell-free filtrate in
the lab
Seed treatment
with cell
suspension of Bt
isolates in
greenhouse trials
Laboratory
Greenhouse
10 isolates of B.
thuringiensis isolated
from rhizosphere of
okra, brinjal, tomato,
cotton, cabbage,
onion, and
watermelon
Not
specified
Bt protein inhibited
egg hatching and
killed 2nd stage
juveniles in the lab
study
Bt cell suspension
reduced number of
galls, egg masses,
eggs/egg mass, and
nematode
populations in the
greenhouse study
Khan et al.
(2010)
(continued)
 
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