Abstract
The rhizobacterial composition varies according to the soil properties. To test if the effect of herbicides on the rhizobacterial communities of genetically modified NK603 glyphosate-tolerant maize varies according to different soil locations, a comparison was made between the effects of glyphosate (Roundup Plus), a post-emergence applied herbicide, and a pre-emergence applied herbicide (GTZ) versus untreated soil. The potential effect was monitored by direct amplification, cloning, and sequencing of the soil DNA encoding 16S rRNA, and high-throughput DNA pyrosequencing of the bacterial DNA coding for the 16S rRNA hypervariable V6 region. The results obtained using three different methods to analyze the herbicide effect on the rhizobacterial communities of genetically modified NK603 maize were comparable to those previously obtained when glyphosate-tolerant maize was grown in soil with different characteristics. Both herbicides decreased the bacterial diversity in the rhizosphere, with Actinobacteria being the taxonomic group most affected. The results suggest that both herbicides affected the structure of the maize rhizobacterial community, but glyphosate was environmentally less aggressive.
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Claims 4
Claim · model-written summary
Three analysis methods gave comparable herbicide-effect results.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results obtained using three different methods to analyze the herbicide effect on the rhizobacterial communities of genetically modified NK603 maize were comparable to those previously obtained when glyphosate-tolerant maize was grown in soil with different characteristics”
Claim · model-written summary
Both herbicides decreased bacterial diversity in the maize rhizosphere.
- Treatment
- Both herbicidese0
- Outcome
- bacterial diversity in the rhizospheree0
- Direction
- decreasede0
- Comparator
- untreated soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both herbicides decreased the bacterial diversity in the rhizosphere”
t0“Glyphosate-Tolerant Maize”
e1“glyphosate (Roundup Plus), a post-emergence applied herbicide, and a pre-emergence applied herbicide (GTZ) versus untreated soil”
Claim · model-written summary
Actinobacteria were the most affected group under the herbicides.
- Outcome
- Actinobacteria being the taxonomic group most affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with Actinobacteria being the taxonomic group most affected”
t0“Glyphosate-Tolerant Maize”
Claim · model-written summary
Glyphosate was interpreted as less environmentally aggressive than the other herbicide.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both herbicides affected the structure of the maize rhizobacterial community, but glyphosate was environmentally less aggressive”
The same questions in other papers
herbicide · soil: biology · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.