Ngành Ochrophyta
Lớp Bacillariophyceae
(Khuê tảo - Diatom)
1
Lưu Thị Thanh Nhàn
(lttnhan@hcmus.edu.vn)
Phòng thí nghiệm Thực vật
Bộ môn Sinh thái và Sinh học tiến hóa
Hình dạng
• Khuê tảo gồm những rong đơn bào, đôi khi hợp
thành tập chủng
2
• Khuê tảo được bao bọc bởi vỏ bằng SiO2, với
nhiều chạm trổ tinh vi
• Vỏ gồm 2 mảnh: mảnh trên và mảnh dưới
• Mảnh trên epitheca = epivalve+ epicingulum
• Mảnh dưới hypotheca = hypovalve + hypocingulum
Vỏ (giáp)
3
Vỏ (giáp)
Diagrammatic cross section through the frustule of a diatom
4
• Mặt mảnh (valve view): mảnh trên hoặc mảnh dưới
• Mặt đai (girdle view): epicingulum và hypocingulum
Vỏ (giáp)
Mặt mảnh Mặt đai
5
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