Diversity of algae and their biotechnological potential.

This chapter will discuss the diversity of algae and show that the diversity is much greater than just obligately oxygenic photosynthetic algae and that it includes many mixotrophic and heterotrophic organisms that are more similar to the major groups of microorganisms. The photosynthetic groups are seen as part of the plant kingdom, whereas the non-photosynthetic groups are not related to plants at all. The organisation of algal groups has become complex and confusing - The chapter will address the problems within this area of eukaryotic taxonomy. The metabolic diversity of algae and the ability to genetically engineer algae are key components in developing the biotechnology of algae. As more researchers become interested in exploiting algae for a number of industrial products, it is important to understand the relationships between different groups of algae and the relationships of algae with the rest of the living world.