塩ストレスに対するブルーパニックグラス(Panicum antidotale Retz.)の応答
Ayoub El Mouttaqi1, Ihssane Mnaouer1, Hafsa Debbagh-Nour1
1African Sustainable Agriculture Research Institute (ASARI), University Mohammed VI Polytechnic (UM6P), Laâyoune, Morocco.
Journal of the science of food and agriculture
|February 7, 2026
まとめ
ブルーパニックグラス(Panicum antidotale)は顕著な塩分耐性を示し、灌漑水の塩分濃度の上昇下でも安定したバイオマス生産を維持します。この回復力は、塩性農業環境における価値ある飼料作物としての可能性を強調しています。
科学分野:
- 農学
- 植物生理学
- 環境科学
背景:
- 塩分と気候変動は農業生産性に重大な脅威をもたらしています。
- 回復力のある飼料作物の開発は、食料安全保障にとって不可欠です。
研究 の 目的:
- 様々な灌漑水の塩分濃度下でのブルーパニックグラス(Panicum antidotale)の塩分耐性を評価すること。
- 塩分ストレスに対するブルーパニックグラスの生理学的および生化学的応答を評価すること。
主な方法:
- 6つの塩分濃度(0-25 dS/m)を用いた制御環境実験。
- 完全にランダム化されたデザイン。
- バイオマス生産、生理学的パラメータ(気孔伝導度、クロロフィル、水分含有量、光合成指数)、およびイオン蓄積を測定しました。
主要な成果:
- ブルーパニックグラスは10 dS/mまで安定したバイオマスを維持し、それ以上の塩分濃度(20-25 dS/m)では有意な減少が見られました。
- 塩分ストレスは酸化ストレスマーカー(過酸化水素、マロンジアルデヒド)を増加させ、気孔伝導度、クロロフィル含有量、水分含有量を減少させました。
- ナトリウムの蓄積、特に根での蓄積は塩分濃度とともに増加しましたが、カリウムレベルは安定したままであり、イオン排除が重要な耐性メカニズムであることを示唆しています。
結論:
- ブルーパニックグラスは顕著な塩分耐性を示し、塩性条件下での有望な飼料作物となっています。
- 生産性と品質の高い辺縁地での栽培を最適化するために、さらなる圃場研究が推奨されます。
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