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Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum
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| Zeitschriftentitel: | Plant, Cell & Environment |
|---|---|
| Personen und Körperschaften: | , |
| In: | Plant, Cell & Environment, 9, 1986, 3, S. 185-190 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
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| Schlagwörter: |
| author_facet |
OKAZAKI, Y. TAZAWA, M. OKAZAKI, Y. TAZAWA, M. |
|---|---|
| author |
OKAZAKI, Y. TAZAWA, M. |
| spellingShingle |
OKAZAKI, Y. TAZAWA, M. Plant, Cell & Environment Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum Plant Science Physiology |
| author_sort |
okazaki, y. |
| spelling |
OKAZAKI, Y. TAZAWA, M. 0140-7791 1365-3040 Wiley Plant Science Physiology http://dx.doi.org/10.1111/1365-3040.ep11611622 <jats:p><jats:bold>Abstract</jats:bold> When internodal cells of <jats:italic>Lamprothamnium succinetum</jats:italic> were exposed to a hypotonic medium containing more than 1 mol m<jats:sup>−3</jats:sup> Ca<jats:sup>2+</jats:sup>, the elevated turgor pressure decreased and reached a steady state within 30–60 min. The hypotonic treatment caused the membrane potential to depolarize, with a time lag of ca. 1 min. The membrane conductance increased transiently with the same time lag and reached a peak value within 2–3 min. When the external Ca<jats:sup>2+</jats:sup> concentration was lowered to 0.01 mol m<jats:sup>−3</jats:sup>, both turgor regulation and change in the membrane conductance were strongly inhibited, although the membrane depolarization was not affected. When the Ca2+ level was returned to the normal level, the cells recovered their ability for turgor regulation and the membrane conductance attained a peak value after ca. 15–30 s. This response time is definitely shorter than that needed for the conductance change in cells exposed to a hypotonic medium having a normal level of Ca<jats:sup>2+</jats:sup> from the beginning. We thus conclude that at least two sequential processes are involved in turgor regulation: a Ca<jats:sup>2+</jats:sup> ‐independent process, followed by a Ca<jats:sup>2+</jats:sup>‐dependent process.</jats:p> Involvement of calcium ion in turgor regulation upon hypotonic treatment in <i>Lamprothamnium succinctum</i> Plant, Cell & Environment |
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1986 |
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Plant, Cell & Environment |
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| title |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_unstemmed |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_full |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_fullStr |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_full_unstemmed |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_short |
Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_sort |
involvement of calcium ion in turgor regulation upon hypotonic treatment in <i>lamprothamnium succinctum</i> |
| topic |
Plant Science Physiology |
| url |
http://dx.doi.org/10.1111/1365-3040.ep11611622 |
| publishDate |
1986 |
| physical |
185-190 |
| description |
<jats:p><jats:bold>Abstract</jats:bold> When internodal cells of <jats:italic>Lamprothamnium succinetum</jats:italic> were exposed to a hypotonic medium containing more than 1 mol m<jats:sup>−3</jats:sup> Ca<jats:sup>2+</jats:sup>, the elevated turgor pressure decreased and reached a steady state within 30–60 min. The hypotonic treatment caused the membrane potential to depolarize, with a time lag of ca. 1 min. The membrane conductance increased transiently with the same time lag and reached a peak value within 2–3 min. When the external Ca<jats:sup>2+</jats:sup> concentration was lowered to 0.01 mol m<jats:sup>−3</jats:sup>, both turgor regulation and change in the membrane conductance were strongly inhibited, although the membrane depolarization was not affected. When the Ca2+ level was returned to the normal level, the cells recovered their ability for turgor regulation and the membrane conductance attained a peak value after ca. 15–30 s. This response time is definitely shorter than that needed for the conductance change in cells exposed to a hypotonic medium having a normal level of Ca<jats:sup>2+</jats:sup> from the beginning. We thus conclude that at least two sequential processes are involved in turgor regulation: a Ca<jats:sup>2+</jats:sup> ‐independent process, followed by a Ca<jats:sup>2+</jats:sup>‐dependent process.</jats:p> |
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| author | OKAZAKI, Y., TAZAWA, M. |
| author_facet | OKAZAKI, Y., TAZAWA, M., OKAZAKI, Y., TAZAWA, M. |
| author_sort | okazaki, y. |
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| description | <jats:p><jats:bold>Abstract</jats:bold> When internodal cells of <jats:italic>Lamprothamnium succinetum</jats:italic> were exposed to a hypotonic medium containing more than 1 mol m<jats:sup>−3</jats:sup> Ca<jats:sup>2+</jats:sup>, the elevated turgor pressure decreased and reached a steady state within 30–60 min. The hypotonic treatment caused the membrane potential to depolarize, with a time lag of ca. 1 min. The membrane conductance increased transiently with the same time lag and reached a peak value within 2–3 min. When the external Ca<jats:sup>2+</jats:sup> concentration was lowered to 0.01 mol m<jats:sup>−3</jats:sup>, both turgor regulation and change in the membrane conductance were strongly inhibited, although the membrane depolarization was not affected. When the Ca2+ level was returned to the normal level, the cells recovered their ability for turgor regulation and the membrane conductance attained a peak value after ca. 15–30 s. This response time is definitely shorter than that needed for the conductance change in cells exposed to a hypotonic medium having a normal level of Ca<jats:sup>2+</jats:sup> from the beginning. We thus conclude that at least two sequential processes are involved in turgor regulation: a Ca<jats:sup>2+</jats:sup> ‐independent process, followed by a Ca<jats:sup>2+</jats:sup>‐dependent process.</jats:p> |
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| imprint | Wiley, 1986 |
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| spelling | OKAZAKI, Y. TAZAWA, M. 0140-7791 1365-3040 Wiley Plant Science Physiology http://dx.doi.org/10.1111/1365-3040.ep11611622 <jats:p><jats:bold>Abstract</jats:bold> When internodal cells of <jats:italic>Lamprothamnium succinetum</jats:italic> were exposed to a hypotonic medium containing more than 1 mol m<jats:sup>−3</jats:sup> Ca<jats:sup>2+</jats:sup>, the elevated turgor pressure decreased and reached a steady state within 30–60 min. The hypotonic treatment caused the membrane potential to depolarize, with a time lag of ca. 1 min. The membrane conductance increased transiently with the same time lag and reached a peak value within 2–3 min. When the external Ca<jats:sup>2+</jats:sup> concentration was lowered to 0.01 mol m<jats:sup>−3</jats:sup>, both turgor regulation and change in the membrane conductance were strongly inhibited, although the membrane depolarization was not affected. When the Ca2+ level was returned to the normal level, the cells recovered their ability for turgor regulation and the membrane conductance attained a peak value after ca. 15–30 s. This response time is definitely shorter than that needed for the conductance change in cells exposed to a hypotonic medium having a normal level of Ca<jats:sup>2+</jats:sup> from the beginning. We thus conclude that at least two sequential processes are involved in turgor regulation: a Ca<jats:sup>2+</jats:sup> ‐independent process, followed by a Ca<jats:sup>2+</jats:sup>‐dependent process.</jats:p> Involvement of calcium ion in turgor regulation upon hypotonic treatment in <i>Lamprothamnium succinctum</i> Plant, Cell & Environment |
| spellingShingle | OKAZAKI, Y., TAZAWA, M., Plant, Cell & Environment, Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum, Plant Science, Physiology |
| title | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_full | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_fullStr | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_full_unstemmed | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_short | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| title_sort | involvement of calcium ion in turgor regulation upon hypotonic treatment in <i>lamprothamnium succinctum</i> |
| title_unstemmed | Involvement of calcium ion in turgor regulation upon hypotonic treatment in Lamprothamnium succinctum |
| topic | Plant Science, Physiology |
| url | http://dx.doi.org/10.1111/1365-3040.ep11611622 |