Abstract
Characteristics of glyphosate [ N -(phosphonomethyl)glycine] uptake for as long as 3 days by plant cells were studied using suspension-cultured potato ( Solanum tuberosum L. cv. ‘Red Pontiac’ and S. brevidens Phil.) cells. An experimental system was developed wherein uptake was assayed in a reduced salt medium that minimized cell growth yet maintained cell viability. Glyphosate uptake was nonlinear over time; an immediate rapid uptake phase was followed by uptake at a decreased rate that continued through 72 h. Glyphosate uptake was the same in both an experimental uptake medium (reduced salt and sucrose, no hormones) and in the complete growth medium used for routine cell growth. The pattern of glyphosate uptake was similar with both Red Pontiac and S. brevidens cells, though uptake was greater in Red Pontiac cells. Glyphosate uptake was not inhibited by 1 mM CaSO 4 , MgSO 4 , MnSO 4 , or ZnSO 4 . Rather, uptake was inhibited by the absence of salts at 8 h, and ZnSO 4 and MnSO 4 increased uptake. Similarly, increasing concentrations (0 to 5 mM) of CaSO 4 and CaCl 2 did not inhibit uptake, whereas the absence of either salt of Ca 2+ decreased uptake. Increasing concentrations of (NH 4 ) 2 SO 4 (0 to 150 mM) did not affect glyphosate uptake, but (NH 4 ) 2 SO 4 at 50 mM and above was toxic to the cells.
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Claims 12
Claim · model-written summary
Glyphosate uptake had an initial rapid phase followed by slower uptake through 72 hours.
- Taxon
- potato
Solanum tuberosumt0 - Outcome
- Glyphosate uptakee0
- Direction
- decreased ratee0
- Value
- 72 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate uptake was nonlinear over time; an immediate rapid uptake phase was followed by uptake at a decreased rate that continued through 72 h”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Glyphosate uptake was the same in reduced salt uptake medium and complete growth medium.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- experimental uptake mediume0
- Outcome
- Glyphosate uptakee0
- Direction
- the samee0
- Comparator
- complete growth mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate uptake was the same in both an experimental uptake medium (reduced salt and sucrose, no hormones) and in the complete growth medium used for routine cell growth”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Red Pontiac cells had greater glyphosate uptake than S. brevidens cells despite a similar temporal pattern.
- Taxon
- potatoSolanum tuberosumt0
- Material
- Red Pontiace0
- Outcome
- glyphosate uptakee0
- Direction
- greatere0
- Comparator
- S. brevidense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pattern of glyphosate uptake was similar with both Red Pontiac and S. brevidens cells, though uptake was greater in Red Pontiac cells”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
One millimolar CaSO 4 or MgSO 4 did not inhibit glyphosate uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 1 mM CaSO 4 , MgSO 4e0
- Outcome
- Glyphosate uptakee0
- Direction
- not inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate uptake was not inhibited by 1 mM CaSO 4 , MgSO 4 , MnSO 4 , or ZnSO 4”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Absence of salts inhibited glyphosate uptake at eight hours.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- absence of saltse0
- Outcome
- uptakee0
- Direction
- inhibitede0
- Value
- 8 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“uptake was inhibited by the absence of salts at 8 h”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
ZnSO 4 increased glyphosate uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- ZnSO 4e0
- Outcome
- uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ZnSO 4 and MnSO 4 increased uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
MnSO 4 increased glyphosate uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- MnSO 4e0
- Outcome
- uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ZnSO 4 and MnSO 4 increased uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Increasing CaSO 4 concentration did not inhibit uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- CaSO 4e0
- Outcome
- uptakee0
- Direction
- did not inhibite0
- Qualifier
- 0 to 5 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing concentrations (0 to 5 mM) of CaSO 4 and CaCl 2 did not inhibit uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Increasing CaCl 2 concentration did not inhibit uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- CaCl 2e0
- Outcome
- uptakee0
- Direction
- did not inhibite0
- Qualifier
- 0 to 5 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing concentrations (0 to 5 mM) of CaSO 4 and CaCl 2 did not inhibit uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Absence of calcium salt decreased glyphosate uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- absence of either salt of Ca 2+e0
- Outcome
- uptakee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the absence of either salt of Ca 2+ decreased uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Ammonium sulfate concentration did not affect glyphosate uptake.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- (NH 4 ) 2 SO 4e0
- Outcome
- glyphosate uptakee0
- Direction
- did not affecte0
- Qualifier
- 0 to 150 mMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing concentrations of (NH 4 ) 2 SO 4 (0 to 150 mM) did not affect glyphosate uptake”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
Claim · model-written summary
Ammonium sulfate at 50 mM and above was toxic to potato cells.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- (NH 4 ) 2 SO 4 at 50 mM and abovee0
- Outcome
- toxic to the cellse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“(NH 4 ) 2 SO 4 at 50 mM and above was toxic to the cells”
t0“Glyphosate Uptake by Suspension-Cultured Potato (Solanum tuberosumandS. brevidens) Cells”
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