Abstract
The effects of aluminum (Al) on root elongation, the mechanical extensibility of the cell wall, and the amount of cell-wall polysaccharides in the roots of Al-resistant (Atlas 66) and Al-sensitive (Scout 66) cultivars of wheat (Triticum aestivum L.) were examined. Exposure to 10 &mgr;M AlCl3 for 6 h inhibited root elongation in Scout 66 but not in Atlas 66. It also decreased the mechanical extensibility of the cell wall in the roots of both cultivars, but prominently only in the roots of Scout 66. The amount of hemicellulose in the 10-mm region of root apex of Scout 66 was increased by the exposure to Al, especially in the apical regions. Al did not influence the neutral sugar composition of either pectin or hemicellulose in Scout 66 roots. However, Al increased the weight-average molecular mass of hemicellulosic polysaccharides and the amounts of wall-bound ferulic and diferulic acids in Scout 66 roots. These findings suggest that Al modifies the metabolism of cell-wall components and thus makes the cell wall thick and rigid, thereby inhibiting the growth of wheat roots.
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Claims 7
Claim · model-written summary
AlCl3 exposure for 6 h inhibited root elongation in Scout 66 but not in Atlas 66 wheat.
- Taxon
- wheat
Triticum aestivumt0 - Material
- Scout 66e1
- Organ / stage
- rootst0
- Treatment
- AlCl3e1
- Outcome
- root elongatione1
- Direction
- inhibitede1
- Comparator
- Atlas 66e1
Not reportedSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e1“Exposure to 10 &mgr;M AlCl3 for 6 h inhibited root elongation in Scout 66 but not in Atlas 66”
Claim · model-written summary
Al decreased the mechanical extensibility of the cell wall in wheat roots, prominently only in Scout 66.
- Taxon
- wheatTriticum aestivumt0
- Material
- Scout 66e2
- Organ / stage
- rootse2
- Treatment
- AlCl3e1
- Outcome
- mechanical extensibility of the cell walle2
- Direction
- decreasede2
- Qualifier
- prominently only in the roots of Scout 66e2
Not reportedComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e1“Exposure to 10 &mgr;M AlCl3 for 6 h inhibited root elongation in Scout 66 but not in Atlas 66”
e2“It also decreased the mechanical extensibility of the cell wall in the roots of both cultivars, but prominently only in the roots of Scout 66”
Claim · model-written summary
Al exposure increased the amount of hemicellulose in the root apex of Scout 66.
- Taxon
- wheatTriticum aestivumt0
- Material
- Scout 66e3
- Organ / stage
- root apexe3
- Treatment
- exposure to Ale3
- Outcome
- amount of hemicellulosee3
- Direction
- increasede3
- Qualifier
- 10-mm regione3
Not reportedComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e3“The amount of hemicellulose in the 10-mm region of root apex of Scout 66 was increased by the exposure to Al”
Claim · model-written summary
Al did not influence the neutral sugar composition of pectin or hemicellulose in Scout 66 roots.
- Taxon
- wheatTriticum aestivumt0
- Material
- Scout 66e4
- Organ / stage
- rootse4
- Treatment
- Ale4
- Outcome
- neutral sugar composition of either pectin or hemicellulosee4
- Direction
- did not influencee4
Not reportedComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e4“Al did not influence the neutral sugar composition of either pectin or hemicellulose in Scout 66 roots”
Claim · model-written summary
Al increased the weight-average molecular mass of hemicellulosic polysaccharides in Scout 66 roots.
- Taxon
- wheatTriticum aestivumt0
- Material
- Scout 66e5
- Organ / stage
- rootse5
- Treatment
- Ale5
- Outcome
- weight-average molecular mass of hemicellulosic polysaccharidese5
- Direction
- increasede5
Not reportedComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e5“Al increased the weight-average molecular mass of hemicellulosic polysaccharides and the amounts of wall-bound ferulic and diferulic acids in Scout 66 roots”
Claim · model-written summary
Al increased the amounts of wall-bound ferulic and diferulic acids in Scout 66 roots.
- Taxon
- wheatTriticum aestivumt0
- Material
- Scout 66e5
- Organ / stage
- rootse5
- Treatment
- Ale5
- Outcome
- amounts of wall-bound ferulic and diferulic acidse5
- Direction
- increasede5
Not reportedComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e5“Al increased the weight-average molecular mass of hemicellulosic polysaccharides and the amounts of wall-bound ferulic and diferulic acids in Scout 66 roots”
Claim · model-written summary
Al appears to modify cell-wall metabolism, making the wall thick and rigid and thereby inhibiting growth of wheat roots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Ale6
- Outcome
- growth of wheat rootse6
- Qualifier
- metabolism of cell-wall componentse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat (Triticum aestivum) roots”
e6“Al modifies the metabolism of cell-wall components and thus makes the cell wall thick and rigid, thereby inhibiting the growth of wheat roots”
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