Abstract
Abstract Tea plant ( Camellia sinensis L) accumulates large amounts of fluoride in mature leaves from soils of normal fluoride availabilities, but the properties of fluoride absorption by this plant species are not well understood. The present study examined the characteristic of fluoride uptake by tea plants and the impact of Al with solution and soil experiments. The results showed that the fluoride taken up by tea plants was largely and readily transported, in particular to the leaves. The fluoride in leaves increased linearly with fluoride concentrations in the uptake solution ( R 2 = 0.75, P < 0.001) or in the soil ( R 2 = 0.88, P < 0.001), whereas those in root and stem were only marginally influenced. Including Al in solution or adding Al to the soil apparently increased the uptake and translocation of fluoride to the leaves. The concentrations of fluoride in the leaves were significantly ( P < 0.05) increased by 19.1% or 37.7% when 18.5 µmol l −1 Al or 74.1 µmol l −1 Al respectively was included in the uptake solution, compared with the control without Al during an uptake period of 22 h. Similarly, Al application (100 mg kg −1 ) to soil led to significantly higher fluoride concentrations in mature leaves and new shoots (one bud with three leaves). By contrast, the concentrations of Al in leaves in solution and soil experiments were not affected by fluoride and Al treatments. Nevertheless, higher Al concentrations after Al and fluoride additions were observed in the new shoots in soil experiments. Copyright © 2003 Society of Chemical Industry
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Claims 12
Claim · model-written summary
Fluoride taken up by tea plants was readily transported, especially to leaves.
Verbatim
e0“fluoride taken up by tea plants was largely and readily transported, in particular to the leaves”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Leaf fluoride increased linearly with uptake-solution fluoride concentration.
Verbatim
e0“fluoride in leaves increased linearly with fluoride concentrations in the uptake solution ( R 2 = 0.75, P < 0.001)”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Leaf fluoride increased linearly with soil fluoride concentration.
Verbatim
e0“fluoride in leaves increased linearly with fluoride concentrations in the uptake solution ( R 2 = 0.75, P < 0.001) or in the soil ( R 2 = 0.88, P < 0.001)”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Root and stem fluoride was only marginally influenced by fluoride availability.
Not reportedDirection
Verbatim
e0“those in root and stem were only marginally influenced”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Al in solution increased fluoride uptake and movement to leaves.
- Taxon
- tea plantt0
- Treatment
- Including Al in solutione0
- Outcome
- uptake and translocation of fluoride to the leavese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Including Al in solution or adding Al to the soil apparently increased the uptake and translocation of fluoride to the leaves”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Al addition to soil increased fluoride uptake and movement to leaves.
- Taxon
- tea plantt0
- Treatment
- adding Al to the soile0
- Outcome
- uptake and translocation of fluoride to the leavese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Including Al in solution or adding Al to the soil apparently increased the uptake and translocation of fluoride to the leaves”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
18.5 µmol l −1 Al increased leaf fluoride by 19.1% versus no Al over 22 h.
Verbatim
e0“concentrations of fluoride in the leaves were significantly ( P < 0.05) increased by 19.1% or 37.7% when 18.5 µmol l −1 Al or 74.1 µmol l −1 Al respectively was included in the uptake solution, compared with the control without Al during an uptake period of 22 h”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
74.1 µmol l −1 Al increased leaf fluoride by 37.7% versus no Al over 22 h.
Verbatim
e0“concentrations of fluoride in the leaves were significantly ( P < 0.05) increased by 19.1% or 37.7% when 18.5 µmol l −1 Al or 74.1 µmol l −1 Al respectively was included in the uptake solution, compared with the control without Al during an uptake period of 22 h”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Soil Al application increased fluoride in mature leaves.
- Taxon
- tea plantt0
- Treatment
- Al application (100 mg kg −1 ) to soile0
- Outcome
- fluoride concentrations in mature leavese0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“Al application (100 mg kg −1 ) to soil led to significantly higher fluoride concentrations in mature leaves and new shoots (one bud with three leaves)”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Soil Al application increased fluoride in new shoots.
- Taxon
- tea plantt0
- Organ / stage
- new shootse0
- Treatment
- Al application (100 mg kg −1 ) to soile0
- Outcome
- fluoride concentrations in mature leaves and new shootse0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“Al application (100 mg kg −1 ) to soil led to significantly higher fluoride concentrations in mature leaves and new shoots (one bud with three leaves)”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
Leaf Al concentration was unaffected by fluoride and Al treatments.
- Taxon
- tea plantt0
- Treatment
- fluoride and Al treatmentse0
- Outcome
- concentrations of Al in leavese0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“concentrations of Al in leaves in solution and soil experiments were not affected by fluoride and Al treatments”
t0“tea plant (Camellia sinensis L)”
Claim · model-written summary
New shoots had higher Al concentrations following soil Al and fluoride additions.
- Taxon
- tea plantt0
- Organ / stage
- new shootse0
- Treatment
- Al and fluoride additionse0
- Outcome
- Al concentrationse0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“higher Al concentrations after Al and fluoride additions were observed in the new shoots in soil experiments”
t0“tea plant (Camellia sinensis L)”
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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.