author_facet KATSUHARA, M.
TAZAWA, M.
KATSUHARA, M.
TAZAWA, M.
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
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series Plant, Cell & Environment
source_id 49
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.
container_issue 2
container_start_page 179
container_title Plant, Cell & Environment
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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