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Dinh dưỡng silicon làm giảm peroxy hóa lipid và mất cân bằng ion ở cây con Glycyrrhiza uralensis dưới stress muối
Tóm tắt
Độ mặn của đất làm giảm sự phát triển của Glycyrrhiza uralensis ở các khu vực khô cằn và bán khô cằn phía tây bắc Trung Quốc. Dinh dưỡng silicon (Si) có thể giảm bớt áp lực muối ở nhiều loại cây trồng, bao gồm cây lương thực, cây ăn trái và cây rau. Trong nghiên cứu này, chúng tôi đã điều tra các hiệu ứng giảm bớt của Si lên các đặc điểm sinh trưởng, hoạt động của enzyme chống oxy hóa (SOD và POD) và nồng độ MDA, cùng nồng độ K+ và Na+ ở cây con G. uralensis bị stress với nồng độ 50 mM NaCl. Kết quả cho thấy áp lực NaCl đã gây giảm đáng kể chiều dài rễ, số lượng rễ phụ, số lượng lá, cũng như trọng lượng khô của thân và tổng trọng lượng khô của G. uralensis. Stress NaCl cũng đã làm giảm đáng kể hoạt động của SOD và POD, và tỷ lệ K+/Na+, nhưng làm tăng nồng độ MDA trong lá của cây con G. uralensis. Sự bổ sung Si đã làm tăng hoạt động của SOD và POD, và giảm nồng độ MDA, điều này dẫn đến khả năng giải độc các loài oxy phản ứng tốt hơn và giảm thiểu sự peroxy hóa lipid. Si cũng đã tăng đáng kể tỷ lệ K+/Na+ trong thân và lá của G. uralensis. Kết luận, Si có thể làm giảm bớt các tác động bất lợi của stress muối có thể do làm giảm nồng độ Na+ và cải thiện hoạt động của enzyme chống oxy hóa của G. uralensis, và những hiệu ứng giảm bớt này phụ thuộc vào nồng độ Si và thời gian xử lý Si.
Từ khóa
#Glycyrrhiza uralensis #độ mặn #stress muối #dinh dưỡng silicon #enzyme chống oxy hóa #peroxy hóa lipidTài liệu tham khảo
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