Re: Do the Oomycota belong in the Fungal Kingdom.

Hi NIK,

Gene mapping and the use of the electron microscope has vastly increased our knowledge of the natural world. We did have a nice simple way to represent life on earth, but this is proving too simplistic. Like models which have to be modified, developed or simply disregarded when we extend our knowledge, the classification system is being changed. Moreover, we do not yet have standardisation. The phylogenetic relationships amongst microorganisms in particular are undergoing a major reoganisation.

Oomycetes are now classified as stramenopiles (chromista). If you take a look at the t ree of life, you will see that stramenopiles are being put on the same level as the animal and plant kingdoms. However, there are plenty of modifications still to be made and scientists involved in classification may still arrive at another system of organisation.

The original classification amongst the fungi was due to the filamentous structure and saprophytic way of life. The use of micolaminarin as the energy storage molecule (instead of starch) and the flagella has resulted in them being grouped with diatoms and brown algae

Richard Kingsley

Try these websites for more information:

Introduction to the Oomycota

Unive rsal and Eukaryote Phylogenetic Trees based on 16s rDNA

Introduction to the Chromista

Stramenopiles