Abstract
Abstract Hormetic effects refer to the phenomenon in which lowdoses of certain herbicides, such as glyphosate, stimulate plant growth rather than inhibit it. A field experiment was conducted using six glyphosate application rates (5, 10, 20, 40, 80, and 160 g a.e. ha −1 ), along with an untreated control on potato plants. The activity of enzymatic antioxidants, including catalase (CAT), ascorbate peroxidase (APX), and guaiacol peroxidase (GPX), as well as levels of malondialdehyde (MDA), hydrogen peroxide (H₂O₂), and leaf protein content, were evaluated, along with plant height, tuber yield, and tuber size distribution. The highest yield was recorded at a low glyphosate dose of (20 g a.e. ha −1 ), where tuber production increased by approximately 30% compared to the control. This treatment also resulted in a 54% increase in marketable tubers (> 150 g) and a 14% increase in total biomass. In contrast, the highest glyphosate rate (160 g a.e. ha −1 ) significantly reduced total yield, marketable tubers, total biomass, and plant height. This treatment also led to the highest levels of APX and GPX activity, along with elevated concentrations of MDA and H 2 O 2 . However, the highest CAT enzyme activity was observed at 20 g a.e. ha −1 glyphosate rate. These findings suggest that low-dose glyphosate applications, up to 20 g a.e. ha −1 , can enhance potato yield; however, rates exceeding this threshold may negatively affect yield.
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Claims 8
Claim · model-written summary
At 20 g a.e. ha −1, potato tuber production rose about 30% versus control.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- glyphosate dose of (20 g a.e. ha −1 )e0
- Outcome
- tuber productione0
- Direction
- increasede0
- Value
- approximately 30%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield was recorded at a low glyphosate dose of (20 g a.e. ha −1 ), where tuber production increased by approximately 30% compared to the control”
t0“potato”
Claim · model-written summary
At 20 g a.e. ha −1, marketable tubers rose 54%.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 20 g a.e. ha −1e1
- Outcome
- marketable tuberse0
- Direction
- increasee0
- Value
- 54%e0
- Qualifier
- > 150 ge0
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment also resulted in a 54% increase in marketable tubers (> 150 g)”
t0“potato”
e1“The highest yield was recorded at a low glyphosate dose of (20 g a.e. ha −1 ), where tuber production increased by approximately 30% compared to the control”
e2“along with an untreated control on potato plants”
Claim · model-written summary
At 20 g a.e. ha −1, total biomass rose 14%.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 20 g a.e. ha −1e1
- Outcome
- total biomasse0
- Direction
- increasee0
- Value
- 14%e0
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 14% increase in total biomass”
t0“potato”
e1“The highest yield was recorded at a low glyphosate dose of (20 g a.e. ha −1 ), where tuber production increased by approximately 30% compared to the control”
e2“along with an untreated control on potato plants”
Claim · model-written summary
The highest glyphosate dose significantly reduced yield, marketable tubers, biomass, and plant height.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 160 g a.e. ha −1e0
- Outcome
- total yield, marketable tubers, total biomass, and plant heighte0
- Direction
- reducede0
- Comparator
- untreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest glyphosate rate (160 g a.e. ha −1 ) significantly reduced total yield, marketable tubers, total biomass, and plant height”
t0“potato”
e1“along with an untreated control on potato plants”
Claim · model-written summary
The highest dose produced the highest APX and GPX activity.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 160 g a.e. ha −1e1
- Outcome
- APX and GPX activitye0
- Direction
- higheste0
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This treatment also led to the highest levels of APX and GPX activity”
t0“potato”
e1“the highest glyphosate rate (160 g a.e. ha −1 ) significantly reduced total yield, marketable tubers, total biomass, and plant height”
e2“along with an untreated control on potato plants”
Claim · model-written summary
The highest dose elevated MDA and hydrogen peroxide concentrations.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 160 g a.e. ha −1e1
- Outcome
- concentrations of MDA and H 2 O 2e0
- Direction
- elevatede0
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated concentrations of MDA and H 2 O 2”
t0“potato”
e1“the highest glyphosate rate (160 g a.e. ha −1 ) significantly reduced total yield, marketable tubers, total biomass, and plant height”
e2“along with an untreated control on potato plants”
Claim · model-written summary
CAT activity was highest at 20 g a.e. ha −1.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 20 g a.e. ha −1 glyphosate ratee0
- Outcome
- CAT enzyme activitye0
- Direction
- higheste0
- Comparator
- untreated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest CAT enzyme activity was observed at 20 g a.e. ha −1 glyphosate rate”
t0“potato”
e1“along with an untreated control on potato plants”
Claim · model-written summary
The authors recommend glyphosate doses up to 20 g a.e. ha −1 for yield, cautioning that higher doses may reduce yield.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- low-dose glyphosate applications, up to 20 g a.e. ha −1e0
- Qualifier
- rates exceeding this threshold may negatively affect yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low-dose glyphosate applications, up to 20 g a.e. ha −1 , can enhance potato yield; however, rates exceeding this threshold may negatively affect yield”
The same questions in other papers
glyphosate · yield · Solanum tuberosum (potato)Results differ
3 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- no effect
8 papers more in this group
See all 12 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.