Abstract
The relation between the toxic effects of alminum (Al) on growth and cell viability in roots of wheat (Triticum aestivum L. cv Atlas 66) was investigated. Root elongation of wheat was reduced after 3 h of treatment with 50 μM AlCl3 at pH 4.7. Only the apical region of the root treated with Al was stained with hematoxylin. Al treatment decreased the length and increased the diameter of the cells at the elongation zone of the root. Staining with propidium iodide which can permeate through only a damaged plasma membrane showed that treatment with Al for longer than 3 h decreased cell viability. These findings suggest that inhibition of cell elongation by Al is partially accompanied by cell death. Lignin was deposited in the cell wall of the second and third layers of the cortex in the elongation zone of the root. Also the disruption of microtubules ocurred in elongating cells treated with 50 μM Al for 3 h. The effects of Al stress on root elongation and cell viability in the elongation zone were inhibited by 1 mM Ca.In conclusion, inhibition of root elongation by Al is strongly related to the inhibition of cell elongation, accompanied by decreased cell viability, lignin deposition and the disruption of microtubules.
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Claims 7
Claim · model-written summary
Aluminium treatment reduced root elongation of wheat.
- Taxon
- wheat
Triticum aestivume1 - Material
- Atlas 66e0
- Treatment
- 50 μM AlCl3 at pH 4.7e1
- Outcome
- Root elongatione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e1“Root elongation of wheat was reduced after 3 h of treatment with 50 μM AlCl3 at pH 4.7”
Claim · model-written summary
Aluminium treatment decreased the length of cells in the elongation zone of wheat roots.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- elongation zone of the roote2
- Treatment
- Al treatmente2
- Outcome
- lengthe2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e2“Al treatment decreased the length and increased the diameter of the cells at the elongation zone of the root”
Claim · model-written summary
Aluminium treatment increased the diameter of cells in the elongation zone of wheat roots.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- elongation zone of the roote2
- Treatment
- Al treatmente2
- Outcome
- diametere2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e2“Al treatment decreased the length and increased the diameter of the cells at the elongation zone of the root”
Claim · model-written summary
Treatment with aluminium for longer than 3 h decreased cell viability in wheat roots.
- Taxon
- wheatTriticum aestivume0
- Treatment
- treatment with Al for longer than 3 he3
- Outcome
- cell viabilitye3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e3“treatment with Al for longer than 3 h decreased cell viability”
Claim · model-written summary
Lignin was deposited in the cell wall of the second and third cortex layers in the elongation zone of wheat roots.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- cell wall of the second and third layers of the cortexe4
- Outcome
- Lignine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e4“Lignin was deposited in the cell wall of the second and third layers of the cortex in the elongation zone of the root”
Claim · model-written summary
Aluminium at 50 μM for 3 h disrupted microtubules in elongating cells of wheat roots.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- elongating cellse5
- Treatment
- 50 μM Al for 3 he5
- Outcome
- disruption of microtubulese5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e5“the disruption of microtubules ocurred in elongating cells treated with 50 μM Al for 3 h”
Claim · model-written summary
Calcium at 1 mM inhibited the effects of aluminium stress on root elongation and cell viability in the elongation zone of wheat.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- elongation zonee6
- Treatment
- 1 mM Cae6
- Outcome
- effects of Al stress on root elongation and cell viabilitye6
- Direction
- inhibitede6
- Comparator
- Al stresse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots of wheat (Triticum aestivum L. cv Atlas 66)”
e6“The effects of Al stress on root elongation and cell viability in the elongation zone were inhibited by 1 mM Ca”
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