Abstract
Received January 4, 1999; Accepted March 25, 1999 Secondary ion mass spectrometry (SIMS), electron probe X-ray microanalysis (EPMA) and transmission electron microscopy (TEM) were used to study the tissular distribution and subcellular localization of aluminium (Al) precipitate in roots of Viciafaba. The broad bean plant, grown in nitrate solution with 193 microM Al3+ at pH 4.8, for 15 days showed Al deposits in the roots. Al accumulation was not detected in the stems nor in the leaves. Al was found mainly localized on the root's surfaces and within the cell walls of the cortical cells. Al signal was not detected in the vascular tissues. Two weeks exposure to Al caused ultrastructural changes in cortical cells and sometimes a complete disruption of these cells. Deposition of Al in form of insoluble complexes associated with phosphorus, appeared as electron opaque materials in the vacuoles of disrupted cortex cells and in the intercellular inclusions. The leaves turned yellowish at the end of 15 days exposure. The use of electron microprobe, to investigate the same tissues as the ones investigated by SIMS, provided complementary results on aluminium allocation.
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Claims 8
Claim · model-written summary
Broad bean exposed to aluminium showed root deposits.
- Taxon
- broad bean
Vicia fabae0 - Organ / stage
- rootse0
- Treatment
- 193 microM Al3+ at pH 4.8e0
- Outcome
- Al depositse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The broad bean plant, grown in nitrate solution with 193 microM Al3+ at pH 4.8, for 15 days showed Al deposits in the roots”
Claim · model-written summary
Aluminium accumulation was undetected in stems and leaves.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- stems nor in the leavese0
- Outcome
- Al accumulation was not detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al accumulation was not detected in the stems nor in the leaves”
t0“Vicia faba”
Claim · model-written summary
Aluminium localized mainly on root surfaces and cortical cell walls.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- root's surfaces and within the cell walls of the cortical cellse0
- Outcome
- Al was found mainly localizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al was found mainly localized on the root's surfaces and within the cell walls of the cortical cells”
t0“Vicia faba”
Claim · model-written summary
Aluminium signal was undetected in vascular tissues.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- vascular tissuese0
- Outcome
- Al signal was not detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al signal was not detected in the vascular tissues”
t0“Vicia faba”
Claim · model-written summary
Two weeks of aluminium exposure caused cortical cell ultrastructural changes and sometimes complete disruption.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- cortical cellse0
- Treatment
- Two weeks exposure to Ale0
- Outcome
- ultrastructural changes in cortical cells and sometimes a complete disruption of these cellse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two weeks exposure to Al caused ultrastructural changes in cortical cells and sometimes a complete disruption of these cells”
t0“Vicia faba”
Claim · model-written summary
Aluminium deposits associated with phosphorus appeared in vacuoles and intercellular inclusions.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- vacuoles of disrupted cortex cells and in the intercellular inclusionse0
- Outcome
- insoluble complexes associated with phosphoruse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deposition of Al in form of insoluble complexes associated with phosphorus, appeared as electron opaque materials in the vacuoles of disrupted cortex cells and in the intercellular inclusions”
t0“Vicia faba”
Claim · model-written summary
Leaves yellowed after 15 days of aluminium exposure.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- leavese0
- Outcome
- turned yellowishe0
- Qualifier
- at the end of 15 days exposuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaves turned yellowish at the end of 15 days exposure”
t0“Vicia faba”
Claim · model-written summary
Electron microprobe gave complementary aluminium allocation results to SIMS on the same tissues.
- Taxon
- Vicia fabaVicia fabat0
- Outcome
- complementary results on aluminium allocatione0
- Comparator
- SIMSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of electron microprobe, to investigate the same tissues as the ones investigated by SIMS, provided complementary results on aluminium allocation”
t0“Vicia faba”