Page 63 - Algae Anatomy, Biochemistry, and Biotechnology

46 Algae: Anatomy, Biochemistry, and Biotechnology

FIGURE 2.15 Transmission electron microscopy image of Nannochloropsis sp. in transversal section.
(a) Arrows point to the cell wall. Negative staining of the shed cell walls (b). (Bar: 0.5 mm.)

emulsifying and stabilizing properties. In the Xanthophyceae (Heterokontophyta) the composition
of the wall is mainly cellulosic, while in the Chlorophyceae (Chlorophyta) xylose, mannose, and
chitin may be present in addition to cellulose. Some members of the Chlorophyceae (Chlorophyta)
and Charophyceae (Chlorophyta) have calcified walls.