| Developmental studies of transgenic maize expressing Cry1Ab on the African stem borer, Busseola fusca; effects on midgut cellular structure. | |
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MedLine Citation:
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PMID: 21842526 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Busseola fusca is a major pest of maize in Africa but unfortunately is difficult to control using chemical insecticides. Insect-resistant transgenic crops may provide an alternative viable strategy to control this pest. RESULTS: Recombinant Cry1Ab (1%) reduced larval weight by 60% over the trial period, while larval weight in the control group increased by 25%; no effects on mortality were observed. Insect survival, developmental rate and pupal and adult weight were significantly reduced (P < 0.05) on maize expressing Cry1Ab (MON810) compared with the non-transformed parental line. These differences were more pronounced with second-instar larvae than with third-instar larvae. Leaf area consumed by Bacillus thuringiensis (Bt)-fed larvae was significantly lower (0.5 cm(2) larva(-1) day(-1) ) compared with the area consumed by control-fed insects (3.3 cm(2) larva(-1) day(-1) ). EM studies revealed that consumption of Bt maize deleteriously affected gut integrity. Effects were observed in columnar cells of the midgut epithelium, with the cytoplasm becoming highly vacuolated; the microvilli were disorganised, the mitochondria were abnormal and there was an increase in the number of lysosomal bodies. The rough endoplasmic reticulum had also become dilated. CONCLUSION: This study confirms the potential for Bt maize, when used as part of an IPM programme, for control of B. fusca. Copyright © 2011 Society of Chemical Industry. |
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Authors:
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Derick M George; F Claire Rind; Mark W Bendall; Mark A Taylor; Angharad Mr Gatehouse |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-12 |
Journal Detail:
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Title: Pest management science Volume: - ISSN: 1526-4998 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100898744 Medline TA: Pest Manag Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Society of Chemical Industry. |
Affiliation:
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School of Biology, Newcastle University, Newcastle upon Tyne, UK; Newcastle Institute for Research on Sustainability, Newcastle University, Newcastle upon Tyne, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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