Abstract
Abstract Effects of Al toxicity and interaction of Al and Mg on growth of twelve sorghum ( Sorghum bicolor (L.) Moench) genotypes have been studied in nutrient solutions (pH 4.2). Aluminium at 30 μM decreased biomass (dry matter yield) of the individual genotypes by factors between 1.27 and 7.36, with identical sensitivity grouping of genotypes as obtained in an earlier pot experiment with an acid soil. Resembling acid‐soil stress, Al toxicity was simultaneously expressed in two independent ways, i.e. impairment of root development and induced Mg deficiency. The effect of Al on total dry matter production of the genotypes was correlated more closely with changes in specific root length (m g −1 dry root) than with changes in internal Mg status. Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM) not only decreased Al‐induced Mg deficiency but also reduced the concentrations of Al in/on the roots and its damaging effect on root development. Therefore, the sorghum genotypes were less sensitive to Al at the higher Mg levels. At a high Mg concentration in the solution (7.5 mM) dry matter yield of two genotypes was even stimulated by Al.
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Claims 10
Claim · model-written summary
Aluminium at 30 μM reduced sorghum genotype dry matter yield by factors of 1.27 to 7.36.
- Material
- individual genotypese0
- Treatment
- Aluminium at 30 μMe0
- Outcome
- biomass (dry matter yield)e0
- Direction
- decreasede0
- Value
- 1.27 and 7.36e0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminium at 30 μM decreased biomass (dry matter yield) of the individual genotypes by factors between 1.27 and 7.36, with identical sensitivity grouping of genotypes as obtained in an earlier pot experiment with an acid soil.”
t0“sorghum”
Claim · model-written summary
The genotype sensitivity grouping matched a previous acid-soil pot experiment.
- Outcome
- identical sensitivity grouping of genotypese0
- Comparator
- earlier pot experiment with an acid soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminium at 30 μM decreased biomass (dry matter yield) of the individual genotypes by factors between 1.27 and 7.36, with identical sensitivity grouping of genotypes as obtained in an earlier pot experiment with an acid soil.”
t0“sorghum”
Claim · model-written summary
Al toxicity impaired sorghum root development.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resembling acid‐soil stress, Al toxicity was simultaneously expressed in two independent ways, i.e. impairment of root development and induced Mg deficiency.”
t0“sorghum”
Claim · model-written summary
Al toxicity induced Mg deficiency in sorghum.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resembling acid‐soil stress, Al toxicity was simultaneously expressed in two independent ways, i.e. impairment of root development and induced Mg deficiency.”
t0“sorghum”
Claim · model-written summary
Effects of Al on dry matter production correlated more closely with specific root length than internal Mg status.
- Organ / stage
- roote0
- Outcome
- total dry matter productione0
- Direction
- correlated more closelye0
- Comparator
- internal Mg statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of Al on total dry matter production of the genotypes was correlated more closely with changes in specific root length (m g −1 dry root) than with changes in internal Mg status.”
t0“sorghum”
Claim · model-written summary
Increasing Mg in solution reduced Al‐induced Mg deficiency.
- Treatment
- Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM)e0
- Outcome
- Al‐induced Mg deficiencye0
- Direction
- decreasede0
- Comparator
- 0.25 mMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM) not only decreased Al‐induced Mg deficiency but also reduced the concentrations of Al in/on the roots and its damaging effect on root development.”
t0“sorghum”
Claim · model-written summary
Increasing Mg in solution reduced concentrations of Al in/on the roots.
- Treatment
- Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM)e0
- Outcome
- concentrations of Al in/on the rootse0
- Direction
- reducede0
- Comparator
- 0.25 mMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM) not only decreased Al‐induced Mg deficiency but also reduced the concentrations of Al in/on the roots and its damaging effect on root development.”
t0“sorghum”
Claim · model-written summary
Increasing Mg in solution reduced damaging effect on root development.
- Treatment
- Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM)e0
- Outcome
- damaging effect on root developmente0
- Direction
- reducede0
- Comparator
- 0.25 mMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased Mg concentrations in the solutions (2.5 and 7.5 instead of 0.25 mM) not only decreased Al‐induced Mg deficiency but also reduced the concentrations of Al in/on the roots and its damaging effect on root development.”
t0“sorghum”
Claim · model-written summary
Sorghum genotypes were less sensitive to Al at higher Mg levels.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, the sorghum genotypes were less sensitive to Al at the higher Mg levels.”
Claim · model-written summary
At 7.5 mM Mg, Al stimulated dry matter yield in two sorghum genotypes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At a high Mg concentration in the solution (7.5 mM) dry matter yield of two genotypes was even stimulated by Al.”
t0“sorghum”
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