冬季塩分環境下におけるコウライシバ（Zoysia matrella Merr.）葉身部のイオン濃度
冬季塩分環境下におけるコウライシバ（Zoysia matrella (L.) Merr.）の健全葉および枯死葉のイオン濃度特性を明らかにするため，冬季165日間にわたり本種に4段階のNaCl溶液［0 g/L (Control)，7.5 g/L，15 g/L，30 g/L］を施用した。その結果，30 g/L区では，全ての葉身部の枯死が確認された（枯死率100％）。葉身部のNa＋濃度は健全葉より枯死葉で高く，7.5 g/L区で1.4倍，15 g/L区で2.0倍高い値であった。Cl－濃度も同様に枯死葉で高い値を示し，7.5 g/L区で1.4倍，15 g/L区で2.0倍，健全葉より高い値を示した。一方...
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| Published in | 日本緑化工学会誌 Vol. 46; no. 2; pp. 232 - 236 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
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日本緑化工学会
30.11.2020
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| Abstract | 冬季塩分環境下におけるコウライシバ（Zoysia matrella (L.) Merr.）の健全葉および枯死葉のイオン濃度特性を明らかにするため，冬季165日間にわたり本種に4段階のNaCl溶液［0 g/L (Control)，7.5 g/L，15 g/L，30 g/L］を施用した。その結果，30 g/L区では，全ての葉身部の枯死が確認された（枯死率100％）。葉身部のNa＋濃度は健全葉より枯死葉で高く，7.5 g/L区で1.4倍，15 g/L区で2.0倍高い値であった。Cl－濃度も同様に枯死葉で高い値を示し，7.5 g/L区で1.4倍，15 g/L区で2.0倍，健全葉より高い値を示した。一方，K＋濃度は健全葉で高く，Control区で2.3倍，7.5 g/L区で1.8倍，15 g/L区で1.8倍，枯死葉より高い値を示し，Na＋，Cl－濃度と逆の傾向を示した。さらに，K＋/Na＋比は，枯死葉より健全葉で高く，7.5 g/L区，15 g/L区においてそれぞれ2.4倍，3.5倍高い値を示した。枯死葉と健全葉のイオン濃度とK＋/Na＋比に明らかな違いが見られたことから，コウライシバは枯死に至る前の老化した葉に多くのNa＋，Cl－を蓄積させることで，冬季における塩ストレスに対応していると考えられた。 |
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| AbstractList | 冬季塩分環境下におけるコウライシバ（Zoysia matrella (L.) Merr.）の健全葉および枯死葉のイオン濃度特性を明らかにするため，冬季165日間にわたり本種に4段階のNaCl溶液［0 g/L (Control)，7.5 g/L，15 g/L，30 g/L］を施用した。その結果，30 g/L区では，全ての葉身部の枯死が確認された（枯死率100％）。葉身部のNa＋濃度は健全葉より枯死葉で高く，7.5 g/L区で1.4倍，15 g/L区で2.0倍高い値であった。Cl－濃度も同様に枯死葉で高い値を示し，7.5 g/L区で1.4倍，15 g/L区で2.0倍，健全葉より高い値を示した。一方，K＋濃度は健全葉で高く，Control区で2.3倍，7.5 g/L区で1.8倍，15 g/L区で1.8倍，枯死葉より高い値を示し，Na＋，Cl－濃度と逆の傾向を示した。さらに，K＋/Na＋比は，枯死葉より健全葉で高く，7.5 g/L区，15 g/L区においてそれぞれ2.4倍，3.5倍高い値を示した。枯死葉と健全葉のイオン濃度とK＋/Na＋比に明らかな違いが見られたことから，コウライシバは枯死に至る前の老化した葉に多くのNa＋，Cl－を蓄積させることで，冬季における塩ストレスに対応していると考えられた。 |
| Author | 杉浦, 総一郎 高橋, 新平 |
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| Snippet | 冬季塩分環境下におけるコウライシバ（Zoysia matrella (L.) Merr.）の健全葉および枯死葉のイオン濃度特性を明らかにするため，冬季165日間にわたり本種に4段階のNaCl溶液［0 g/L (Control)，7.5 g/L，15 g/L，30 g/L］を施用した。その結果，30... |
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| SubjectTerms | K＋/Na＋比 カリウムイオン ナトリウムイオン 健全葉 枯死葉 耐塩性芝草 |
| Title | 冬季塩分環境下におけるコウライシバ（Zoysia matrella Merr.）葉身部のイオン濃度 |
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