Transgenic pollen harms monarch larvae

Although plants transformed with genetic material from the bacterium Bacillus thuringiensis (Bt ) are generally thought to have negligible impact on non-target organisms, Bt corn plants might represent a risk because most hybrids express the Bt toxin in pollen, and corn pollen is dispersed over at l...

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Bibliographic Details
Published in:Nature (London) 1999-05, Vol.399 (6733), p.214-214
Main Authors: Losey, John E, Rayor, Linda S, Carter, Maureen E
Format: Article
Language:English
Subjects:
Animals
Bacillus thuringiensis
Bacillus thuringiensis - genetics
Butterflies
Danaus plexippus
Feeding Behavior
Larva
Nymphalidae
Plant Leaves
Plants, Genetically Modified
Pollen - genetics
Zea mays
Zea mays - genetics
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Summary:Although plants transformed with genetic material from the bacterium Bacillus thuringiensis (Bt ) are generally thought to have negligible impact on non-target organisms, Bt corn plants might represent a risk because most hybrids express the Bt toxin in pollen, and corn pollen is dispersed over at least 60 metres by wind. Corn pollen is deposited on other plants near corn fields and can be ingested by the non-target organisms that consume these plants. In a laboratory assay we found that larvae of the monarch butterfly, Danaus plexippus, reared on milkweed leaves dusted with pollen from Bt corn, ate less, grew more slowly and suffered higher mortality than larvae reared on leaves dusted with untransformed corn pollen or on leaves without pollen.
ISSN:0028-0836
1476-4687
DOI:10.1038/20338