Ảnh hưởng của môi trường nuôi đến sinh trưởng và tích lũy carotenoid trong pha sinh trưởng ở vi tảo Tetradesmus obliquus
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Từ khóa:
Vi tảo
Tetradesmus obliquus
carotenoid
nitơ
photpho
Tóm tắt
Nghiên cứu này khảo sát ảnh hưởng của nồng độ các chất dinh dưỡng nitơ (N), photpho (P) và muối NaCl đến khả năng sinh trưởng và tích lũy carotenoid của vi tảo Tetradesmus obliquus được phân lập từ các thủy vực nước ngọt tại Đà Nẵng. Kết quả cho thấy T. obliquus sinh trưởng tốt nhất trong môi trường BG11 với nồng độ N 120 mgN.L-1, nồng độ P 5,43 mgP.L-1 và môi trường BG11 có nồng độ N 260 mgN.L-1, P 12,21 mgP.L-1 với tốc độ sinh trưởng tương ứng đạt 0,298 ± 0,01 ngày-1 và 0,252 ± 0,20 ngày-1. Đồng thời, ở các điều kiện này, sự tích lũy carotenoid tổng cũng đạt tốt nhất với năng suất trung bình tương ứng đạt 0,80 ± 0,13 % và 0,49 ± 0.18 % sinh khối khô. Bên cạnh đó, muối NaCl ở nồng độ rất nhỏ (0,01 - 0,2 M) được xác định gây ra tác động tiêu cực đến T. obliquus trong giai đoạn sinh trưởng, và nồng độ NaCl 0,6 M ức chế hoàn toàn sự sinh trưởng của vi tảo.
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Phan Thi Diem My, Phan Nhat Truong, Vo Van Minh, Trinh Dang Mau, Tran Nguyen Quynh Anh. “Ảnh hưởng của môi trường nuôi đến Sinh trưởng Và tích lũy Carotenoid Trong Pha Sinh trưởng ở Vi tảo Tetradesmus Obliquus”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 18, số p.h 9, Tháng Chín 2020, tr 46-51, https://jst-ud.vn/jst-ud/article/view/3340.
