Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Vi khuẩn khuyến khích tăng trưởng thực vật chịu mặn đa đặc tính giảm thiểu căng thẳng muối và nâng cao sự phát triển của Amaranthus Viridis
Tóm tắt
Môi trường toàn cầu đang thay đổi không ngừng gây ra các yếu tố stress abiotic, điều này có ảnh hưởng tiêu cực đến sự phát triển và năng suất của thực vật. Trong số các áp lực abiotic, độ mặn của đất là một trở ngại lớn trong việc đáp ứng nhu cầu thực phẩm toàn cầu đồng thời đảm bảo nông nghiệp bền vững. Để giải quyết vấn đề này, nghiên cứu hiện tại đã tìm ra các chế phẩm vi khuẩn đồng sinh đa chức năng từ các môi trường khắc nghiệt có thể phối hợp với nhau để giảm bớt căng thẳng do muối. Để tiền phân lập các vi khuẩn thúc đẩy sự phát triển của thực vật (PGPB), các mẫu đã được thu thập từ cây chịu mặn Suaeda nudiflora tìm thấy trong đất sa mạc có độ mặn. Các mẫu được sàng lọc để xác định đặc điểm hình thái, sinh hóa và phân tử và được kiểm nghiệm trong phòng thí nghiệm dưới điều kiện nhà kính. Các dòng vi khuẩn nội cộng sinh Bacillus safensis (BS) và Bacillus haynesii (BH) có dấu hiệu tăng trưởng cây trồng đáng kể dưới điều kiện in vitro và được kiểm tra thêm trong nhà kính để thúc đẩy sự tăng trưởng của cây con Amaranthus viridis dưới các điều kiện độ mặn (4 ds m−1 và 6 ds m−1). Cả hai dòng vi khuẩn đều có khả năng sản xuất acid gibberellic, acid indole-3-acetic, hydrogen cyanide, amoniac, 1-amino cyclopropane-1-carboxylic acid deaminase, exopolysaccharides, protease, chitinase, amylase, cellulase, và các khoáng chất đã hòa tan như photpho, kẽm, và kali. Dòng BS có khả năng sản xuất siderophore, trong khi dòng BH có khả năng cố định nitơ và sản xuất pectinase. Cả hai dòng đều hiệu quả dưới các điều kiện stress abiotic như độ pH, nhiệt độ, muối và hạn hán. Việc ứng dụng PGPB chịu mặn đa đặc tính là một chiến lược khả thi và thân thiện với môi trường để cải thiện khả năng chịu muối ở thực vật. Các liên minh vi khuẩn được phát hiện có hiệu quả hơn so với việc cấy ghép một chủng đơn lẻ trong việc thúc đẩy sự phát triển của thực vật trong điều kiện độ mặn, và chúng có tiềm năng để phát triển hơn nữa như một sản phẩm chế phẩm sinh học độc đáo.
Từ khóa
#vi khuẩn khuyến khích tăng trưởng thực vật #căng thẳng muối #khả năng chịu mặn #Amaranthus viridis #Bacillus safensis #Bacillus haynesii #hợp tác vi khuẩn.Tài liệu tham khảo
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