Abstract
Application of glyphosate herbicide in genetically modified (GM) soybean [Glycine max (L.) Merrill] in soils with low zinc (Zn) concentration may interfere in the uptake of this and other nutrients, with negative impact on productivity. Thus, an experiment was conducted in greenhouse conditions on Ustoxix Quatzipsamment soil to investigate the effects of the interaction of glyphosate with Zn for the yield, photosynthesis, soil fertility and nutritional status of soybean. The treatments consisted of two soybean varieties [BRS 133 (conventional—NGM) and its essentially derived transgenic line BRS 245RR (GM) with and without glyphosate application] and five Zn rates (0, 5, 10, 20 and 40 mg kg−1, source zinc sulfate (ZnSO4)), with four replicates. Except for the copper (Cu) and iron (Fe) concentrations, the introduction of the herbicide-resistant gene is the predominant factor reducing nutrient uptake, photosynthetic (A) rate, stomatal conductance (Gs), leaf chlorophyll and ureide concentrations. The administration of Zn rates lowered the leaf phosphorus (P) concentration, and there was significant increase in Zn concentration in the soil and in the plant. Except for the 20 mg kg−1 of Zn rate, the use of the herbicide did not affect the shoot dry weight (SDW) and seed yield, and on average, the maximum seed yield was obtained with Zn concentrations of 26.4 and 18.7 mg kg−1 extracted by Mehlich 1 and diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA), respectively.
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Claims 8
Claim · model-written summary
The herbicide-resistant gene reduced nutrient uptake except copper and iron concentrations.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- introduction of the herbicide-resistant genee0
- Outcome
- nutrient uptakee0
- Direction
- reducinge0
- Qualifier
- Except for the copper (Cu) and iron (Fe) concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Except for the copper (Cu) and iron (Fe) concentrations, the introduction of the herbicide-resistant gene is the predominant factor reducing nutrient uptake”
Claim · model-written summary
The herbicide-resistant gene reduced photosynthetic rate and stomatal conductance.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- introduction of the herbicide-resistant genee0
- Outcome
- photosynthetic (A) rate, stomatal conductance (Gs)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the introduction of the herbicide-resistant gene is the predominant factor reducing nutrient uptake, photosynthetic (A) rate, stomatal conductance (Gs), leaf chlorophyll and ureide concentrations.”
Claim · model-written summary
The herbicide-resistant gene reduced leaf chlorophyll and ureide concentrations.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- introduction of the herbicide-resistant genee0
- Outcome
- leaf chlorophyll and ureide concentrationse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the introduction of the herbicide-resistant gene is the predominant factor reducing nutrient uptake, photosynthetic (A) rate, stomatal conductance (Gs), leaf chlorophyll and ureide concentrations.”
Claim · model-written summary
Increasing zinc rates lowered soybean leaf phosphorus concentration.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Zn ratese0
- Outcome
- leaf phosphorus (P) concentratione0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“The administration of Zn rates lowered the leaf phosphorus (P) concentration”
Claim · model-written summary
Zinc rates significantly increased zinc concentration in soil and plants.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Zn ratese0
- Outcome
- Zn concentration in the soil and in the plante0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“The administration of Zn rates lowered the leaf phosphorus (P) concentration, and there was significant increase in Zn concentration in the soil and in the plant.”
Claim · model-written summary
Glyphosate generally did not affect shoot dry weight or seed yield, except at 20 mg kg−1 Zn.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- use of the herbicidee0
- Outcome
- shoot dry weight (SDW) and seed yielde0
- Direction
- did not affecte0
- Qualifier
- Except for the 20 mg kg−1 of Zn ratee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“Except for the 20 mg kg−1 of Zn rate, the use of the herbicide did not affect the shoot dry weight (SDW) and seed yield”
Claim · model-written summary
Maximum soybean seed yield occurred at 26.4 mg kg−1 Mehlich 1 extracted zinc.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- maximum seed yielde0
- Direction
- maximume0
- Value
- 26.4e0
- Qualifier
- Mehlich 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the maximum seed yield was obtained with Zn concentrations of 26.4 and 18.7 mg kg−1 extracted by Mehlich 1 and diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA), respectively.”
Claim · model-written summary
Maximum soybean seed yield occurred at 18.7 mg kg−1 DTPA-TEA extracted zinc.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- maximum seed yielde0
- Direction
- maximume0
- Value
- 18.7 mg kg−1e0
- Qualifier
- diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“the maximum seed yield was obtained with Zn concentrations of 26.4 and 18.7 mg kg−1 extracted by Mehlich 1 and diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA), respectively.”
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