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Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides
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Zeitschriftentitel: | Plant, Cell & Environment |
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Personen und Körperschaften: | , |
In: | Plant, Cell & Environment, 13, 1990, 2, S. 179-184 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Wiley
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Schlagwörter: |
author_facet |
KATSUHARA, M. TAZAWA, M. KATSUHARA, M. TAZAWA, M. |
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author |
KATSUHARA, M. TAZAWA, M. |
spellingShingle |
KATSUHARA, M. TAZAWA, M. Plant, Cell & Environment Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides Plant Science Physiology |
author_sort |
katsuhara, m. |
spelling |
KATSUHARA, M. TAZAWA, M. 0140-7791 1365-3040 Wiley Plant Science Physiology http://dx.doi.org/10.1111/j.1365-3040.1990.tb01290.x <jats:p><jats:bold>Abstract.</jats:bold> The tonoplasts of internodal cells of <jats:italic>Nitellopsis</jats:italic> were removed by perfusing the vacuoles with media containing a Ca<jats:sup>2</jats:sup> chelator, EGTA. Treatment of tonoplast‐free cells with 100 mol m<jats:sup>3</jats:sup> NaCl induces a large membrane depolarization, a drastic decrease in the membrane resistance and an increase in Na<jats:sup>+</jats:sup> influx. These events are identical to those that occur in intact cells subjected to high NaCl. These responses to NaCl are prevented if 10 mol m<jats:sup>3</jats:sup> Ca<jats:sup>2+</jats:sup> is supplied together with 100 mol m<jats:sup>3</jats:sup> NaCl. The protective effect of Ca<jats:sup>2+</jats:sup> is evident only when the intracellular ATP concentration exceeds 0.1 mol m<jats:sup>3</jats:sup> and does not occur full when the intracellular ATP is removed. AMP at concentrations greater than 0.5 mol m<jats:sup>3</jats:sup> or 0.25 mol m<jats:sup>3</jats:sup> AMPPNP can replace ATP. It is concluded that ATP does not act as an energy source nor as a substrate for protein phosphorylation. ATP seems to exert its effects as a coeffector with Ca<jats:sup>2+</jats:sup> in regulating the Na<jats:sup>+</jats:sup> permeability of the plasma membrane.</jats:p> Mechanism of calcium‐dependent salt tolerance in cells of <i>Nitellopsis obtusa:</i> role of intracellular adenine nucleotides Plant, Cell & Environment |
doi_str_mv |
10.1111/j.1365-3040.1990.tb01290.x |
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title |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_unstemmed |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_full |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_fullStr |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_full_unstemmed |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_short |
Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_sort |
mechanism of calcium‐dependent salt tolerance in cells of <i>nitellopsis obtusa:</i> role of intracellular adenine nucleotides |
topic |
Plant Science Physiology |
url |
http://dx.doi.org/10.1111/j.1365-3040.1990.tb01290.x |
publishDate |
1990 |
physical |
179-184 |
description |
<jats:p><jats:bold>Abstract.</jats:bold> The tonoplasts of internodal cells of <jats:italic>Nitellopsis</jats:italic> were removed by perfusing the vacuoles with media containing a Ca<jats:sup>2</jats:sup> chelator, EGTA. Treatment of tonoplast‐free cells with 100 mol m<jats:sup>3</jats:sup> NaCl induces a large membrane depolarization, a drastic decrease in the membrane resistance and an increase in Na<jats:sup>+</jats:sup> influx. These events are identical to those that occur in intact cells subjected to high NaCl. These responses to NaCl are prevented if 10 mol m<jats:sup>3</jats:sup> Ca<jats:sup>2+</jats:sup> is supplied together with 100 mol m<jats:sup>3</jats:sup> NaCl. The protective effect of Ca<jats:sup>2+</jats:sup> is evident only when the intracellular ATP concentration exceeds 0.1 mol m<jats:sup>3</jats:sup> and does not occur full when the intracellular ATP is removed. AMP at concentrations greater than 0.5 mol m<jats:sup>3</jats:sup> or 0.25 mol m<jats:sup>3</jats:sup> AMPPNP can replace ATP. It is concluded that ATP does not act as an energy source nor as a substrate for protein phosphorylation. ATP seems to exert its effects as a coeffector with Ca<jats:sup>2+</jats:sup> in regulating the Na<jats:sup>+</jats:sup> permeability of the plasma membrane.</jats:p> |
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author | KATSUHARA, M., TAZAWA, M. |
author_facet | KATSUHARA, M., TAZAWA, M., KATSUHARA, M., TAZAWA, M. |
author_sort | katsuhara, m. |
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description | <jats:p><jats:bold>Abstract.</jats:bold> The tonoplasts of internodal cells of <jats:italic>Nitellopsis</jats:italic> were removed by perfusing the vacuoles with media containing a Ca<jats:sup>2</jats:sup> chelator, EGTA. Treatment of tonoplast‐free cells with 100 mol m<jats:sup>3</jats:sup> NaCl induces a large membrane depolarization, a drastic decrease in the membrane resistance and an increase in Na<jats:sup>+</jats:sup> influx. These events are identical to those that occur in intact cells subjected to high NaCl. These responses to NaCl are prevented if 10 mol m<jats:sup>3</jats:sup> Ca<jats:sup>2+</jats:sup> is supplied together with 100 mol m<jats:sup>3</jats:sup> NaCl. The protective effect of Ca<jats:sup>2+</jats:sup> is evident only when the intracellular ATP concentration exceeds 0.1 mol m<jats:sup>3</jats:sup> and does not occur full when the intracellular ATP is removed. AMP at concentrations greater than 0.5 mol m<jats:sup>3</jats:sup> or 0.25 mol m<jats:sup>3</jats:sup> AMPPNP can replace ATP. It is concluded that ATP does not act as an energy source nor as a substrate for protein phosphorylation. ATP seems to exert its effects as a coeffector with Ca<jats:sup>2+</jats:sup> in regulating the Na<jats:sup>+</jats:sup> permeability of the plasma membrane.</jats:p> |
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spelling | KATSUHARA, M. TAZAWA, M. 0140-7791 1365-3040 Wiley Plant Science Physiology http://dx.doi.org/10.1111/j.1365-3040.1990.tb01290.x <jats:p><jats:bold>Abstract.</jats:bold> The tonoplasts of internodal cells of <jats:italic>Nitellopsis</jats:italic> were removed by perfusing the vacuoles with media containing a Ca<jats:sup>2</jats:sup> chelator, EGTA. Treatment of tonoplast‐free cells with 100 mol m<jats:sup>3</jats:sup> NaCl induces a large membrane depolarization, a drastic decrease in the membrane resistance and an increase in Na<jats:sup>+</jats:sup> influx. These events are identical to those that occur in intact cells subjected to high NaCl. These responses to NaCl are prevented if 10 mol m<jats:sup>3</jats:sup> Ca<jats:sup>2+</jats:sup> is supplied together with 100 mol m<jats:sup>3</jats:sup> NaCl. The protective effect of Ca<jats:sup>2+</jats:sup> is evident only when the intracellular ATP concentration exceeds 0.1 mol m<jats:sup>3</jats:sup> and does not occur full when the intracellular ATP is removed. AMP at concentrations greater than 0.5 mol m<jats:sup>3</jats:sup> or 0.25 mol m<jats:sup>3</jats:sup> AMPPNP can replace ATP. It is concluded that ATP does not act as an energy source nor as a substrate for protein phosphorylation. ATP seems to exert its effects as a coeffector with Ca<jats:sup>2+</jats:sup> in regulating the Na<jats:sup>+</jats:sup> permeability of the plasma membrane.</jats:p> Mechanism of calcium‐dependent salt tolerance in cells of <i>Nitellopsis obtusa:</i> role of intracellular adenine nucleotides Plant, Cell & Environment |
spellingShingle | KATSUHARA, M., TAZAWA, M., Plant, Cell & Environment, Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides, Plant Science, Physiology |
title | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_full | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_fullStr | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_full_unstemmed | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_short | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
title_sort | mechanism of calcium‐dependent salt tolerance in cells of <i>nitellopsis obtusa:</i> role of intracellular adenine nucleotides |
title_unstemmed | Mechanism of calcium‐dependent salt tolerance in cells of Nitellopsis obtusa: role of intracellular adenine nucleotides |
topic | Plant Science, Physiology |
url | http://dx.doi.org/10.1111/j.1365-3040.1990.tb01290.x |