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General Information

Document type
  • Peer-reviewed journal article
GE organism
  • maize
GE trait
  • insect resistance
Country
  • USA

Results

Safety for environment
  • mixed

The influence of fertilizer level and spore density on arbuscular mycorrhizal colonization of transgenic Bt 11 maize (Zea mays) in experimental microcosms Open Access

Cheeke, TE; Pace, BA; Rosenstiel, TN; Cruzan, MB
FEMS Microbiology Ecology. 2011 February. 75(2):304–312

Link to full text (open access, freely available)

PMID: 21198682 DOI: 10.1111/j.1574-6941.2010.01013.x

Abstract

Crop plants genetically modified for the expression of Bacillus thuringiensis (Bt) insecticidal toxins have broad appeal for reducing insect damage in agricultural systems, yet questions remain about the impact of Bt plants on symbiotic soil organisms. Here, arbuscular mycorrhizal fungal (AMF) colonization of transgenic maize isoline Bt 11 (expressing Cry1Ab) and its non-Bt parental line (Providence) was evaluated under different fertilizer level and spore density scenarios. In a three-way factorial design, Bt 11 and non-Bt maize were inoculated with 0, 40, or 80 spores of Glomus mosseae and treated weekly with 'No' (0 g L(-1) ), 'Low' (0.23 g L(-1) ), or 'High' (1.87 g L(-1) ) levels of a complete fertilizer and grown for 60 days in a greenhouse. While no difference in AMF colonization was detected between the Bt 11 and Providence maize cultivars in the lower spore/higher fertilizer treatments, microcosm experiments demonstrated a significant reduction in AMF colonization in Bt 11 maize roots in the 80 spore treatments when fertilizer was limited. These results confirm previous work indicating an altered relationship between this Bt 11 maize isoline and AMF and demonstrate that the magnitude of this response is strongly dependent on both nutrient supply and AMF spore inoculation level.

Keywords

arbuscular mycorrhizal fungi (AMF); Bacillus thuringiensis (Bt); transgenic; Zea mays (maize); Bt 11; Cry1Ab

Funding

Funding source
  • Forbes-Lea Foundation
  • PSU Scholarly and Creative Activity Grant
Funding country
  • United States
Funding type
  • NGO: independent

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Cite this study

MLA

Cheeke, TE, BA Pace, TN Rosenstiel, MB Cruzan. "The influence of fertilizer level and spore density on arbuscular mycorrhizal colonization of transgenic Bt 11 maize (Zea mays) in experimental microcosms." FEMS Microbiology Ecology 75.2 (2011): 304–312. Web. 19 Nov. 2017.

APA

Cheeke, TE., Pace, BA., Rosenstiel, TN., & Cruzan, MB. (2011). The influence of fertilizer level and spore density on arbuscular mycorrhizal colonization of transgenic Bt 11 maize (Zea mays) in experimental microcosms. FEMS Microbiology Ecology, 75(2), 304–312. doi:10.1111/j.1574-6941.2010.01013.x

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