Impact of multi-resistant transgenic Bt maize on straw decomposition and the involved microbial communities

Becker, Regina; Bubner, Ben; Remus, Rainer; Wirth, Stephan; Ulrich, Andreas

doi:10.1016/j.apsoil.2013.08.002

Cited by 16 publications

(12 citation statements)

References 53 publications

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“…This indicates a negligible impact of the stacked genes (Bt/CpTI) on rice residue decomposition, which is in accordance with our previous findings (Xiao et al, 2014). Correspondingly, Becker et al (2014) and Lehman et al (2008) showed a comparable decomposition rate of a multi-resistant Bt maize variety with its non-transgenic counterpart. Furthermore, the changes in the initial C content in the leaf and stem residues and the total soluble protein content in the stem residue of KF8 compared with MH86 did not result in changes in the decomposition dynamics of the residue.…”

Section: The Impacts Of Stacked Bt/cpti Genes On the Decomposition Dysupporting

confidence: 92%

“…The plant residues of Bt corn decomposed at a slower rate than non-Bt corn because of the difference in lignin content (Flores et al, 2005), whereas other studies found that these residues decomposed faster compared with its isoline and conventional non-Bt corn (Escher et al, 2000;Griffiths et al, 2009). In general, more studies have shown that Bt crops decompose at rates similar to non-Bt varieties in soil ecosystems (e.g., Becker et al, 2014;Böttger et al, 2015;Daudu et al, 2009;Lehman et al, 2008;Zurbrugg et al, 2010). There are few, but conflicting reports on the effect of genetic modification on the residue decomposition of Bt rice plant materials.…”

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confidence: 95%

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Effects of water management practices on residue decomposition and degradation of Cry1Ac protein from crop-wild Bt rice hybrids and parental lines during winter fallow season

Xiao

Dong

et al. 2015

Ecotoxicology and Environmental Safety

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Section: The Impacts Of Stacked Bt/cpti Genes On the Decomposition Dysupporting

confidence: 92%

mentioning

confidence: 95%

Effects of water management practices on residue decomposition and degradation of Cry1Ac protein from crop-wild Bt rice hybrids and parental lines during winter fallow season

Xiao

Dong

et al. 2015

Ecotoxicology and Environmental Safety

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“…Quantification of the 16S rRNA gene for bacteria, actinobacteria, and the genus Pseudomonas was performed as described by Becker et al . [].…”

Section: Methodsmentioning

confidence: 99%

Ice nucleation activity of agricultural soil dust aerosols from Mongolia, Argentina, and Germany

et al. 2016

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Soil dust particles emitted from agricultural areas contain considerable mass fractions of organic material. Also, soil dust particles may act as carriers for potentially ice‐active biological particles. In this work, we present ice nucleation experiments conducted in the Aerosol Interaction and Dynamics in the Atmosphere (AIDA) cloud chamber. We investigated the ice nucleation efficiency of four types of soil dust from different regions of the world. The results are expressed as ice nucleation active surface site (INAS) densities and presented for the immersion freezing and the deposition nucleation mode. For immersion freezing occurring at 254 K, samples from Argentina, China, and Germany show ice nucleation efficiencies which are by a factor of 10 higher than desert dusts. On average, the difference in ice nucleation efficiencies between agricultural and desert dusts becomes significantly smaller at temperatures below 247 K. In the deposition mode the soil dusts showed higher ice nucleation activity than Arizona Test Dust over a temperature range between 232 and 248 K and humidities RHice up to 125%. INAS densities varied between 109 and 1011 m−2 for these thermodynamic conditions. For one soil dust sample (Argentinian Soil), the effect of treatments with heat was investigated. Heat treatments (383 K) did not affect the ice nucleation efficiency observed at 249 K. This finding presumably excludes proteinaceous ice‐nucleating entities as the only source of the increased ice nucleation efficiency.

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“…During straw decomposition microbial processes are affected by many abiotic factors, including straw quality and size (Bending and Turner, 1999), soil-straw contact (Henriksen and Breland, 2002), soil salinity (Muhammad et al, 2006), geographic location (Sun et al, 2013), straw intrinsic genotype (Becker et al, 2014), and so on. These factors can affect the accessibility of straw to soil microorganisms and the successive dynamics of microbial communities, and thus alter rates of colonization and patterns of decomposition.…”

Section: Introductionmentioning

confidence: 99%

Bacterial community structure in maize stubble-amended soils with different moisture levels estimated by bar-coded pyrosequencing

Lin

Zhang

Zhao

et al. 2015

Applied Soil Ecology

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It is of ecological significance to investigate microbial communities in response to straw amendment and moisture in arable soils. However, in Chinese fluvo-aquic soils, these responses are still poorly understood. We designed an incubation experiment involving two soils with and without the addition of maize stubble at two moisture levels, and bacterial community structure at days 20, 80, and 200 after the start of incubation was assessed via bar-coded pyrosequencing of the 16S rDNA amplicons. In the presence of stubble with identical moisture level, we observed higher bacterial diversity and richness in long-term organic manure-fertilized soil compared with the unfertilized soil at days 20 and 80, which we attributed to the different quality and quantity of organic matter between the two soils. However, there was no significant difference in bacterial diversity and richness between the two soils at day 200, indicating that long-term straw amendment probably lessens the difference in bacterial community structure between the two soils. In the amended soils bacterial diversity, richness, and community composition at 25% of the water-holding capacity distinctly differed from those at 55% of the waterholding capacity, indicating that moisture strongly affects bacterial distribution in the amended soils. As stubble-C availability declined over time, the dominance of copiotrophic population weakened, and oligotrophic population was moderately abundant. Finally, our study suggests that dissolved organic carbon, which drives redistribution in copiotrophic and oligotrophic categories in response to the varying water and stubble-C availability, is a determinant of bacterial community composition in the amended soils.

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Impact of multi-resistant transgenic Bt maize on straw decomposition and the involved microbial communities

Cited by 16 publications

References 53 publications

Effects of water management practices on residue decomposition and degradation of Cry1Ac protein from crop-wild Bt rice hybrids and parental lines during winter fallow season

Effects of water management practices on residue decomposition and degradation of Cry1Ac protein from crop-wild Bt rice hybrids and parental lines during winter fallow season

Ice nucleation activity of agricultural soil dust aerosols from Mongolia, Argentina, and Germany

Bacterial community structure in maize stubble-amended soils with different moisture levels estimated by bar-coded pyrosequencing

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