Abstract
Cd accumulation, its effects on elongation growth of maize coleoptile segments, pH changes of their incubation medium and the membrane potential of parenchymal cells were studied. The Cd content increased significantly with exposure to increasing cadmium concentrations. Coleoptile segments accumulated the metal more efficiently in the range 10-100 µM Cd, than in the range 100-1000 µM Cd. Cd at concentrations higher than 1.0 µM produced a significant inhibition of both growth and proton extrusion. 100 µM Cd caused depolarization of the plasma membrane (PM) potential in parenchymal cells. The simultaneous treatment of maize coleoptile segments by indole-3-acetic acid (IAA) and Cd, counteracted the toxic effect of Cd on growth. Moreover, our data also showed that 100 µM Cd suppressed the characteristic IAA-induced hyperpolarization of the membrane potential, causing membrane depolarization. These results indicate that the toxic effect of Cd on growth of maize coleoptile segments might be, at least in part, caused via reduced PM H+-ATPase activity.
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Claims 7
Claim · model-written summary
Cd content in maize coleoptile segments increased significantly with increasing cadmium exposure.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e1“The Cd content increased significantly with exposure to increasing cadmium concentrations”
Claim · model-written summary
Coleoptile segments accumulated Cd more efficiently at 10-100 µM than at 100-1000 µM.
- Treatment
- range 10-100 µM Cde2
- Outcome
- accumulated the metale2
- Direction
- more efficientlye2
- Comparator
- range 100-1000 µM Cde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e2“Coleoptile segments accumulated the metal more efficiently in the range 10-100 µM Cd, than in the range 100-1000 µM Cd”
Claim · model-written summary
Cd above 1.0 µM significantly inhibited growth and proton extrusion of maize coleoptile segments.
- Treatment
- Cd at concentrations higher than 1.0 µMe3
- Outcome
- growth and proton extrusione3
- Direction
- inhibitione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e3“Cd at concentrations higher than 1.0 µM produced a significant inhibition of both growth and proton extrusion”
Claim · model-written summary
100 µM Cd depolarized the plasma membrane potential of parenchymal cells in maize coleoptile segments.
- Organ / stage
- parenchymal cellse4
- Treatment
- 100 µM Cde4
- Outcome
- plasma membrane (PM) potentiale4
- Direction
- depolarizatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e4“100 µM Cd caused depolarization of the plasma membrane (PM) potential in parenchymal cells”
Claim · model-written summary
Simultaneous IAA and Cd treatment counteracted the toxic effect of Cd on maize coleoptile growth.
- Treatment
- indole-3-acetic acid (IAA) and Cde5
- Outcome
- toxic effect of Cd on growthe5
- Direction
- counteractede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e5“The simultaneous treatment of maize coleoptile segments by indole-3-acetic acid (IAA) and Cd, counteracted the toxic effect of Cd on growth”
Claim · model-written summary
100 µM Cd suppressed the characteristic IAA-induced hyperpolarization of the membrane potential in maize coleoptile segments.
- Treatment
- 100 µM Cde6
- Outcome
- characteristic IAA-induced hyperpolarization of the membrane potentiale6
- Direction
- suppressede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e6“100 µM Cd suppressed the characteristic IAA-induced hyperpolarization of the membrane potential, causing membrane depolarization”
Claim · model-written summary
Cd toxicity to maize coleoptile growth might be, at least in part, caused by reduced PM H+-ATPase activity.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on elongation growth of maize coleoptile segments”
e7“These results indicate that the toxic effect of Cd on growth of maize coleoptile segments might be, at least in part, caused via reduced PM H+-ATPase activity”
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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.