Scientists from the Chinese Academy of Agricultural Sciences reported that
transgenic maize carrying BT gene cry1Ah has no adverse effects on the
population dynamics of endophytic Bacillus subtilis strain B916-gfp. The
results of their investigation are published in Microbiology Open.

Endophytic bacterial communities are vital in promoting plant development
and preventing diseases. However, limited information is available regarding
their population dynamics in plant tissues and bulk soil, particularly in
transgenic crops. Thus, Chiongsi Sun of CAAS and colleagues investigated the
colonization of Bt maize by Bacillus subtilis strain B916-gfp present in
plant tissues and soil. They inoculated Bt and non-Bt maize plants with
B916-gfp by seed soaking, or root irrigation under laboratory greenhouse and
field conditions.

Results showed that B916-gfp colonized both Bt and non-Bt maize. No
significant differences were found in terms of B916-gfp population size in
Bt and non-Bt maize plants, except at one or two time points in the roots
and stems that did not last until the examination period. Planting Bt maize
did not affect the number of B916-gfp in bulk soil in either laboratory or
field trials.

Based on the findings, Bt maize has no effect on colonization of the
endophytic bacteria B916-gfp present in the plant and in bulk soil.

[onlinelibrary.wiley.com]





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