A Review of U.S. and Mexican Cooperation to Develop Insect Resistance Management and Monitoring Methods for Surveying Transgenic Crops Expressing<i>Bacillus thuringiensis</i>Proteins: 2003 to 2010

Tamez‐Guerra, Patricia

doi:10.3958/059.035.0318

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…The contrasting effect observed between hemocytes (cellular response) and PO activity (humoral response) (James and Xu, 2012) may be attributed to the physiological cost of immune regulation, similar to that reported in other Lepidoptera exposed to Bt (Caron and Myers, 2008;Gassmann et al, 2009a, b), their toxins (Carrière et al, 2010;Tamez-Guerra, 2010) or nonpathogenic bacteria (Freitak et al, 2007).…”

Section: Discussionsupporting

confidence: 68%

Regulation by gut bacteria of immune response, Bacillus thuringiensis susceptibility and hemolin expression in Plodia interpunctella

Orozco-Flores

Valadéz-Lira

Oppert

et al. 2017

Journal of Insect Physiology

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Plodia interpunctella (Hübner) is an important stored grain insect pest worldwide, and the first lepidopteran with reported resistance to Bacillus thuringiensis (Bt) toxins. Since gut bacteria may affect Bt insecticidal activity, we evaluated whether P. interpunctella lacking gut bacteria had differences in immune responses and susceptibility to the Bt formulation, Bactospeine. In order to clear gut bacteria, third instar larvae were reared on artificial diet containing antibiotics, or were obtained from sterilized eggs and reared under sterile conditions, and larvae were fed diets with or without Bt. Mortality was significantly lower (p<0.05) in bacteria-free larvae treated with Bt, compared with Bt-treated larvae with unaffected gut bacteria. The number of hemocytes was lower in control and Bt-treated larvae, but was significantly higher (p<0.001) in larvae treated with antibiotics and Bt, and larvae from presterilized eggs and reared on sterile diet had the highest number of hemocytes. Phenoloxidase activity was significantly lower (p<0.05) in Bt-treated larvae from presterilized eggs reared on antibiotics for 24h or in larvae reared on antibiotic-treated diets prior to Bt introduction compared with those fed control diet. Hemolin gene expression was reduced in larvae fed Bt diets compared with control and was not detected in larvae treated with antibiotics. Larvae from sterilized eggs and fed sterile diet never reached the pupal stage. Therefore, the loss of gut bacteria in P. interpunctella larvae affected the host immune response and expression of the hemolin gene, and significantly reduced susceptibility to Bt.

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Section: Discussionsupporting

confidence: 68%

Regulation by gut bacteria of immune response, Bacillus thuringiensis susceptibility and hemolin expression in Plodia interpunctella

Orozco-Flores

Valadéz-Lira

Oppert

et al. 2017

Journal of Insect Physiology

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“…Results reported by Prasifka et al (2009Prasifka et al ( , 2010, Wu et al (2009), Crespo et al (2010), Lopez et al (2010), Tamez-Guerra (2010), Pérez-Hedo et al (2011), Razze et al (2011 and Kruger et al (2012) do not provide new information that would invalidate the previous recommendations on risk mitigation made by the EFSA GMO Panel. Therefore, the EFSA GMO Panel considers that its previous conclusions on maize MON 810 remain valid and applicable.…”

Section: Discussionmentioning

confidence: 76%

Scientific Opinion updating the risk assessment conclusions and risk management recommendations on the genetically modified insect resistant maize MON 810

2012

EFS2

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Following a request from the European Commission, the Panel on Genetically Modified Organisms of the European Food Safety Authority (EFSA GMO Panel) compiled its previous risk assessment conclusions and risk management recommendations on the genetically modified insect resistant maize MON 810, and considered their validity in the light of new relevant scientific publications published from 2009 onwards. Following a search of the scientific literature published between 2009 and October 2012, the EFSA GMO Panel identified 165 peer-reviewed publications containing evidence specific to the risk assessment and/or management of maize MON 810, of which 68 publications were discussed and/or cited in previous EFSA GMO Panel scientific outputs. From the remaining 97 publications, eight were relevant for the molecular characterisation, 27 for food and feed safety assessment, 55 for the environmental risk assessment and/or risk management, two for the molecular characterisation and the environmental risk assessment and/or risk management and five for the food and feed safety assessment and the environmental risk assessment and/or risk management of maize MON 810. None of these publications reported new information that would invalidate the previous conclusions on the safety of maize MON 810 made by the EFSA GMO Panel. Therefore, the EFSA GMO Panel considers that its previous risk assessment conclusions on maize MON 810, as well as its previous recommendations on risk mitigation measures and monitoring, remain valid and applicable. DOI: https://doi.org/10. 2903/j.efsa.2012.3017 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-75246 Published Version Originally published at: Arpaia, Salvatore; Birch, Andrew N E; Chesson, Andrew; du Jardin, Patrick; Gathmann, Achim; Gropp, Jürgen; Herman, Lieve; Hoen-Sorteberg, Hilde-Gunn; Jones, Huw; Kiss, Jozsef; Kleter, Gijs; Lovik, Martinus; Messéan, Antoine; Naegeli, Hanspeter; Nielsen, Kaare Magne; Ovesna, Jaroslava; Perry, Joe; Rostoks, Nils; Tebbe, Christoph (2012) peer-reviewed publications containing evidence specific to the risk assessment and/or management of maize MON 810, of which 68 publications were discussed and/or cited in previous EFSA GMO Panel scientific outputs. From the remaining 97 publications, eight were relevant for the molecular characterisation, 27 for food and feed safety assessment, 55 for the environmental risk assessment and/or risk management, two for the molecular characterisation and the environmental risk assessment and/or risk management and five for the food and feed safety assessment and the environmental risk assessment and/or risk management of maize MON 810. None of these publications reported new information that would invalidate the previous conclusions on the safety of maize MON 810 made by the EFSA GMO Panel. Therefore, the EFSA GMO Panel considers that its previous risk assessment conclusions on maize MON 810, as well as its previous recommendations on risk mitigation measur...

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Evaluation of the Impact of Genetically Modified Cotton After 20 Years of Cultivation in Mexico

Rocha-Munive¹,

Soberón

Castañeda³

et al. 2018

Front. Bioeng. Biotechnol.

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For more than 20 years cotton has been the most widely sown genetically modified (GM) crop in Mexico. Its cultivation has fulfilled all requirements and has gone through the different regulatory stages. During the last 20 years, both research-institutions and biotech-companies have generated scientific and technical information regarding GM cotton cultivation in Mexico. In this work, we collected data in order to analyze the environmental and agronomic effects of the use of GM cotton in Mexico. In 1996, the introduction of Bt cotton made it possible to reactivate this crop, which in previous years was greatly reduced due to pest problems, production costs and environmental concerns. Bt cotton is a widely accepted tool for cotton producers and has proven to be efficient for the control of lepidopteran pests. The economic benefits of its use are variable, and depend on factors such as the international cotton-prices and other costs associated with its inputs. So far, the management strategies used to prevent development of insect resistance to GM cotton has been successful, and there are no reports of insect resistance development to Bt cotton in Mexico. In addition, no effects have been observed on non-target organisms. For herbicide tolerant cotton, the prevention of herbicide resistance has also been successful since unlike other countries, the onset of resistance weeds is still slow, apparently due to cultural practices and rotation of different herbicides. Environmental benefits have been achieved with a reduction in chemical insecticide applications and the subsequent decrease in primary pest populations, so that the inclusion of other technologies—e.g., use of non-Bt cotton- can be explored. Nevertheless, control measures need to be implemented during transport of the bolls and fiber to prevent dispersal of volunteer plants and subsequent gene flow to wild relatives distributed outside the GM cotton growing areas. It is still necessary to implement national research programs, so that biotechnology and plant breeding advances can be used in the development of cotton varieties adapted to the Mexican particular environmental conditions and to control insect pests of regional importance.

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A Review of U.S. and Mexican Cooperation to Develop Insect Resistance Management and Monitoring Methods for Surveying Transgenic Crops ExpressingBacillus thuringiensisProteins: 2003 to 2010

Cited by 5 publications

References 37 publications

Regulation by gut bacteria of immune response, Bacillus thuringiensis susceptibility and hemolin expression in Plodia interpunctella

Regulation by gut bacteria of immune response, Bacillus thuringiensis susceptibility and hemolin expression in Plodia interpunctella

Scientific Opinion updating the risk assessment conclusions and risk management recommendations on the genetically modified insect resistant maize MON 810

Evaluation of the Impact of Genetically Modified Cotton After 20 Years of Cultivation in Mexico

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