Abstract
The effect of salts (nitrates, chlorides, and sulfates) of microelements, Cd2+, Ni2+, and Co2+ and the effect of boric acid and ammonium molybdate on phosphate uptake by maize root cortex segments were tested. Higher concentration (0.1 mM) of Cu2+ salts caused enhancement of phosphate efflux to the extent that efflux was higher than influx. Inhibitory action on phosphate uptake by maize root cortex segments was exerted by following salts: 0.01 mM Cu2+ salts (20–30% inhibition), 0.5 mM ZnSO4 (9.7%), 0.5 and 0.05 mM ZnCl2 (34.3% and 20.8%), 0.1 mM salts of Cd2+, Ni2+, Co2+ (35–78%). 1 mM FeSO4 had significant stimulatory effect (92%) on phosphate uptake. Much weaker stimulatory effect was exerted by 1 mM FeCl3 (14%), 0.05 mM ZnSO4 (9.6%), 0.005 mM ZnCla and ZnSO4 (8.4 and 18.5%) and 0.001 mM CdCl2 and CdSO4 (20.8 and 12.4%). All other tested salts-salts of Mn2+ (0.1 and 0.01 mM), 0.01 and 0.001 mM salts of Co2+ and Ni2+, 0.001 mM salts of Cu2+, 0.001–10 mM boric acid, and 0.001–0.1 mM ammonium molybdate left phosphate uptake unaffected.
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Claims 14
Claim · model-written summary
At 0.1 mM, Cu2+ salts enhanced phosphate efflux beyond influx.
- Organ / stage
- root cortex segmentst0
- Treatment
- 0.1 mM) of Cu2+ saltse0
- Outcome
- phosphate effluxe0
- Direction
- enhancemente0
- Comparator
- influxe0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher concentration (0.1 mM) of Cu2+ salts caused enhancement of phosphate efflux to the extent that efflux was higher than influx.”
t0“maize root cortex segments”
Claim · model-written summary
Cu2+ salts at 0.01 mM inhibited phosphate uptake by 20–30%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inhibitory action on phosphate uptake by maize root cortex segments was exerted by following salts: 0.01 mM Cu2+ salts (20–30% inhibition)”
Claim · model-written summary
ZnSO4 at 0.5 mM inhibited phosphate uptake by 9.7%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.5 mM ZnSO4 (9.7%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
ZnCl2 at 0.5 mM inhibited phosphate uptake by 34.3%.
- Treatment
- 0.5 and 0.05 mM ZnCl2e0
- Outcome
- phosphate absorptiont0
- Direction
- decreaseinferrede0
- Value
- 34.3%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.5 and 0.05 mM ZnCl2 (34.3% and 20.8%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
ZnCl2 at 0.05 mM inhibited phosphate uptake by 20.8%.
- Treatment
- 0.5 and 0.05 mM ZnCl2e0
- Outcome
- phosphate absorptiont0
- Direction
- decreaseinferrede0
- Value
- 20.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.5 and 0.05 mM ZnCl2 (34.3% and 20.8%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
At 0.1 mM, salts of Cd2+, Ni2+ and Co2+ inhibited phosphate uptake by 35–78%.
- Treatment
- 0.1 mM salts of Cd2+, Ni2+, Co2+e0
- Outcome
- phosphate absorptiont0
- Direction
- decreaseinferrede0
- Value
- 35–78%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.1 mM salts of Cd2+, Ni2+, Co2+ (35–78%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
FeSO4 at 1 mM stimulated phosphate uptake by 92%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1 mM FeSO4 had significant stimulatory effect (92%) on phosphate uptake.”
t0“maize root cortex segments”
Claim · model-written summary
FeCl3 at 1 mM stimulated phosphate uptake by 14%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1 mM FeCl3 (14%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
ZnSO4 at 0.05 mM stimulated phosphate uptake by 9.6%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.05 mM ZnSO4 (9.6%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
ZnCla at 0.005 mM stimulated phosphate uptake by 8.4%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.005 mM ZnCla and ZnSO4 (8.4 and 18.5%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
ZnSO4 at 0.005 mM stimulated phosphate uptake by 18.5%.
- Treatment
- 0.005 mM ZnCla and ZnSO4e0
- Outcome
- phosphate absorptiont0
- Direction
- increaseinferrede0
- Value
- 18.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.005 mM ZnCla and ZnSO4 (8.4 and 18.5%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
CdCl2 at 0.001 mM stimulated phosphate uptake by 20.8%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.001 mM CdCl2 and CdSO4 (20.8 and 12.4%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
CdSO4 at 0.001 mM stimulated phosphate uptake by 12.4%.
- Treatment
- 0.001 mM CdCl2 and CdSO4e0
- Outcome
- phosphate absorptiont0
- Direction
- increaseinferrede0
- Value
- 12.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.001 mM CdCl2 and CdSO4 (20.8 and 12.4%)”
t0“phosphate absorption by maize root cortex segments”
Claim · model-written summary
The remaining tested Mn, Co, Ni and Cu salts, boric acid and ammonium molybdate left phosphate uptake unaffected.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All other tested salts-salts of Mn2+ (0.1 and 0.01 mM), 0.01 and 0.001 mM salts of Co2+ and Ni2+, 0.001 mM salts of Cu2+, 0.001–10 mM boric acid, and 0.001–0.1 mM ammonium molybdate left phosphate uptake unaffected.”
t0“maize root cortex segments”
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