Abstract
Application of 10–50 μ M Al ions to a plasma membrane‐enriched microsomal fraction, isolated from roots of maize ( Zea mays L.), resulted in decreased Mg 2 ‐ATPase activity. This was probably caused by changes in membrane structure as detected by the use of spin probes. Both enzymatic activity and membrane structure could in part be protected from Al injury when organic acids, similar to those found in maize root tissue, were administered prior to the metal. When stressed by application of Al ions, the Al‐tolerant maize hybrid, W64, maintained higher concentrations of organic acids, especially malic and trans ‐aconitic, than the Al‐sensitive maize hybrid, A632. We hypothesize that citric and malic acid, because of their high stability constants with Al and/or the acid's concentration reduce Al toxicity in maize root tissue, especially in the Al‐tolerant line.
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Claims 6
Claim · model-written summary
Al ions decreased Mg 2 ‐ATPase activity in maize root membrane fractions.
- Organ / stage
- rootse0
- Treatment
- 10–50 μ M Al ionse0
- Gene
- Mg 2 ‐ATPasee0
- Outcome
- Mg 2 ‐ATPase activitye0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 10–50 μ M Al ions to a plasma membrane‐enriched microsomal fraction, isolated from roots of maize ( Zea mays L.), resulted in decreased Mg 2 ‐ATPase activity.”
Claim · model-written summary
Al ions changed maize root membrane structure.
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was probably caused by changes in membrane structure as detected by the use of spin probes.”
t0“maize root membranes”
Claim · model-written summary
Organic acids partly protected maize root membrane enzymatic activity from Al injury.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both enzymatic activity and membrane structure could in part be protected from Al injury when organic acids, similar to those found in maize root tissue, were administered prior to the metal.”
Claim · model-written summary
Organic acids partly protected maize root membrane structure from Al injury.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both enzymatic activity and membrane structure could in part be protected from Al injury when organic acids, similar to those found in maize root tissue, were administered prior to the metal.”
Claim · model-written summary
Under Al stress, W64 retained higher organic acid concentrations than A632.
- Material
- W64e0
- Treatment
- application of Al ionse0
- Outcome
- concentrations of organic acidse0
- Direction
- highere0
- Qualifier
- especially malic and trans ‐aconitice0
- Comparator
- A632e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When stressed by application of Al ions, the Al‐tolerant maize hybrid, W64, maintained higher concentrations of organic acids, especially malic and trans ‐aconitic, than the Al‐sensitive maize hybrid, A632.”
Claim · model-written summary
The authors hypothesize that citric and malic acid reduce Al toxicity in maize roots.
- Compound
- citric and malic acide0
- Outcome
- Al toxicitye0
- Direction
- reducee0
- Qualifier
- because of their high stability constants with Al and/or the acid's concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We hypothesize that citric and malic acid, because of their high stability constants with Al and/or the acid's concentration reduce Al toxicity in maize root tissue, especially in the Al‐tolerant line.”
The same questions in other papers
aluminium atom · nutrient: content · Zea mays (maize)Positive and negative results
14 papers in the same direction as this paper · 7 in the opposite direction
- positive
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See all 22 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.