Abstract
The effect of the herbicide atrazine on the diazotrophic microorganisms associated with rhizosphere soil and roots of a corn cultivated on a clay-loam soil in a greenhouse, Ustropet Fluvaquentic from Saldana (Tolima) was evaluated. 61% of soil isolates and 83% of root isolates presented characteristic cultural growth of whitish pellicle under the surface of the semisolid NFb-malic acid medium. The soil population of diazotrophic microorganisms and the nitrogenase activity were not significantly different between atrazine treatments. The highest values were obtained 45 days after the highest dose ofatrazine (3.0 Kg/ha). Corn roots without treatment had greater values throughout the time tested, but those were not significantly different between the treatments. As a conclusion, there were not effects on the population and the nitrogenase activity of the diazotrophic microorganisms up to 90 days after the application of atrazine.
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Claims 6
Claim · model-written summary
soil isolates of corn-associated diazotrophs showed characteristic cultural growth.
- Taxon
- corn
Zea mays subsp. mayst0 - Interactor
- diaztrophost0symbiont
- Outcome
- characteristic cultural growth of whitish pelliclee0
- Value
- 61%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“61% of soil isolates and 83% of root isolates presented characteristic cultural growth of whitish pellicle under the surface of the semisolid NFb-malic acid medium.”
t0“diaztrophos associated with corn cultivated on soil”
Claim · model-written summary
root isolates of corn-associated diazotrophs showed characteristic cultural growth.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- diaztrophost0symbiont
- Outcome
- characteristic cultural growth of whitish pelliclee0
- Value
- 83%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“61% of soil isolates and 83% of root isolates presented characteristic cultural growth of whitish pellicle under the surface of the semisolid NFb-malic acid medium.”
t0“diaztrophos associated with corn cultivated on soil”
Claim · model-written summary
Soil diazotroph populations did not differ significantly among atrazine treatments.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- atrazine treatmentse0
- Interactor
- diazotrophic microorganismse0symbiont
- Outcome
- soil population of diazotrophic microorganismse0
- Direction
- not significantly differente0
- Comparator
- between atrazine treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil population of diazotrophic microorganisms and the nitrogenase activity were not significantly different between atrazine treatments.”
t0“corn cultivated on soil”
Claim · model-written summary
Diazotroph nitrogenase activity did not differ significantly among atrazine treatments.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- atrazine treatmentse0
- Interactor
- diazotrophic microorganismse0symbiont
- Outcome
- nitrogenase activitye0
- Direction
- not significantly differente0
- Comparator
- between atrazine treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil population of diazotrophic microorganisms and the nitrogenase activity were not significantly different between atrazine treatments.”
t0“corn cultivated on soil”
Claim · model-written summary
Highest diazotroph population and nitrogenase values occurred 45 days after the highest atrazine dose.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- highest dose ofatrazine (3.0 Kg/ha)e0
- Outcome
- highest valuese0
- Direction
- higheste0
- Qualifier
- 45 days aftere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest values were obtained 45 days after the highest dose ofatrazine (3.0 Kg/ha).”
t0“corn cultivated on soil”
Claim · model-written summary
Untreated corn roots had greater diazotroph values, but differences were not significant.
- Taxon
- CornZea mays subsp. mayse0
- Organ / stage
- rootse0
- Treatment
- without treatmente0
- Outcome
- greater valuese0
- Direction
- greatere0
- Comparator
- between the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn roots without treatment had greater values throughout the time tested, but those were not significantly different between the treatments.”
The same questions in other papers
atrazine · physiology: enzyme activity · Zea mays (maize)Positive and negative results
1 reporting no difference from an alternative
- positive
atrazine · pest · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 4 reporting no difference from an alternative
- positive
- positive
- positive
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.