Phytophthora - Fungi Resemblance

Fungi Resemblance

Phytophthora is sometimes referred to as a fungal-like organism but it is classified under a different kingdom altogether: Chromalveolata (formerly Stramenopila and previously Chromista). This is a good example of convergent evolution: Phytophthora is morphologically very similar to true fungi yet its evolutionary history is quite distinct. In contrast to fungi, stramenopiles are more closely related to plants than animals. Whereas fungal cell walls are made primarily of chitin, stramenopile cell walls are constructed mostly of cellulose. Ploidy levels are different between these two groups; Phytophthora have diploid (paired) chromosomes in the vegetative (growing, non-reproductive) stage of life, Fungi are almost always haploid in this state. Biochemical pathways also differ, notably the highly conserved Lysine synthesis path.

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