Abstract
The effects of Al 3+ (AlCl 3) and Al 3+ + Ca 2+ (CaCl 2) in vitro on the activities of H + ATPase, Mg 2+ ATPase, and Ca 2+ ATPase and membrane fluidities of plasma membrane and tonoplast vesicles from root tips of wheat seedlings were investigated. The activities and V max of H + ATPase, Mg 2+ ATPase and Ca 2+ ATPase, and membrane fluidity decreased when Al 3+ 1.0 mmol/L was added to plasma membrane or tonoplast vesicles (Table 2, Figs.1～5). Lesser inhibition by Al 3+ was found on membrane fluidity, the activities and V max of the enzymes from both membrane vesicles when Ca 2+ 2.5 mmol/L was added (Figs.1～5). Al addition in vitro had no effects on K m values for ATP and optimum pH of ATPases (Table 2). These results suggest that the binding of Al to the membrane results in the inhibition of the ATPase activity.
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Claims 5
Claim · model-written summary
Aluminum decreased ATPase activities and V max in wheat root-tip membrane vesicles.
- Taxon
- Wheat Seedlings
Triticum aestivumt0 - Organ / stage
- Root Tipst0
- Treatment
- Al 3+ 1.0 mmol/Le0
- Outcome
- activities and V max of H + ATPase, Mg 2+ ATPase and Ca 2+ ATPasee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities and V max of H + ATPase, Mg 2+ ATPase and Ca 2+ ATPase, and membrane fluidity decreased when Al 3+ 1.0 mmol/L was added to plasma membrane or tonoplast vesicles”
t0“Root Tips of Wheat Seedlings”
Claim · model-written summary
Aluminum decreased membrane fluidity in wheat root-tip membrane vesicles.
- Taxon
- Wheat SeedlingsTriticum aestivumt0
- Organ / stage
- Root Tipst0
- Treatment
- Al 3+ 1.0 mmol/Le0
- Outcome
- membrane fluiditye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activities and V max of H + ATPase, Mg 2+ ATPase and Ca 2+ ATPase, and membrane fluidity decreased when Al 3+ 1.0 mmol/L was added to plasma membrane or tonoplast vesicles”
t0“Root Tips of Wheat Seedlings”
Claim · model-written summary
Calcium lessened aluminum inhibition of membrane fluidity and ATPase activities and V max.
- Taxon
- Wheat SeedlingsTriticum aestivumt0
- Treatment
- Ca 2+ 2.5 mmol/Le0
- Outcome
- membrane fluidity, the activities and V max of the enzymese0
- Direction
- Lesser inhibitione0
- Comparator
- Al 3+e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lesser inhibition by Al 3+ was found on membrane fluidity, the activities and V max of the enzymes from both membrane vesicles when Ca 2+ 2.5 mmol/L was added”
t0“Wheat Seedlings”
Claim · model-written summary
Aluminum did not alter ATPase K m values for ATP or optimum pH.
- Taxon
- Wheat SeedlingsTriticum aestivumt0
- Treatment
- Al addition in vitroe0
- Outcome
- K m values for ATP and optimum pH of ATPasese0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Al addition in vitro had no effects on K m values for ATP and optimum pH of ATPases”
t0“Wheat Seedlings”
Claim · model-written summary
The authors suggest aluminum binding to membranes inhibits ATPase activity.
- Taxon
- Wheat SeedlingsTriticum aestivumt0
- Outcome
- inhibition of the ATPase activitye0
- Qualifier
- binding of Al to the membranee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the binding of Al to the membrane results in the inhibition of the ATPase activity.”
t0“Wheat Seedlings”
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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.