Negative Correlation between the Ratio of K^+ to Na^+ and Proline Accumulation in Tobacco Suspension Cells
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概要
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The concentrations of K^+, Na^+, and proline and the ratio of K^+ to Na^+ (K^+ / Na^+) were analyzed in NaCl-unadapted and NaCl-adapted tobacco (Nicotiana tabacum) cells in suspension culture. At 3 to 5 d after inoculation, the NaCl-unadapted cells cultured in 100 mmol L^-1 NaCl saline culture medium (Na100 medium) accumulated 28.7 mmol L^-1 proline with a low ratio of K^+ to Na^+ (= 2.8) and the NaCl-adapted cells cultured in the Na100 medium contained 6.28 mmol L^-1 proline with a high K^+ / Na^+ ratio (≧ 7.5). The contents of amino acids for the NaCl-adapted cells in the Na100 medium were similar to those for the NaCl-unadapted cells in a modified LS medium (standard medium). At 14 d after inoculation, the NaCl-unadapted cells in the Na100 medium contained 4.77 mmol L^-1 proline and restored the K^+ / Na^+ ratio from 2.8 to 6.2. These results indicate the presence of a negative correlation between the K^+ / Na^+ ratio and proline accumulation and suggest that a balance between the K^+ / Na^+ ratio and proline accumulation may be the factor involved in determining the salt tolerance of plant cells.
- 社団法人日本土壌肥料学会の論文
著者
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OKUMA Eiji
Graduate School of Natural Science and Technology, Okayama University
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Murata Y
Graduate School Of Natural Science And Technology Okayama University
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Okuma E
Graduate School Of Natural Sci. And Technol. Okayama Univ.
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MURATA Yoshiyuki
Department of Biological Resources Chemistry, Okayama University
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TADA Mikiro
Graduate School of National Science and Technology, Okayama University
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Soeda Kenji
Department of Agriculture, Okayama University
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Fukuda Miho
Department of Agriculture, Okayama University
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Murata Yoshiyuki
Department Of Agriculture Okayama University
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Masamoto Yukimitsu
Graduate School Of Natural Science And Technology Okayama University
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Soeda Kenji
Department Of Agriculture Okayama University
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Fukuda M
Department Of Agriculture Okayama University
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Tada M
Department Of Biological Resources Chemistry Faculty Of Agriculture Okayama University
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Murata Yoshiyuki
Graduate School Of Natural Science And Technology Okayama University
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Tada Mikiro
Fac. Of Agriculture Okayama Univ.
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Okuma Eiji
Graduate School Of Natural Science And Technology Division Of Bioscience Okayama University
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Okuma Eiji
Graduate School Of Natural Science And Technology Okayama University
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Murata Yoshiyuki
Okayama Univ. Okayama Jpn
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