Chlamydospores
Chlamydospores are the asexual reproductive structures of Phytophthora cinnamomi first described by Rands in 1922. They can be distinguished from hyphal swellings by a septum but are often difficult to see. It is often stated in the literature that P. cinnamomi chlamydospores may be thin or thick-walled dormant structures but experimental evidence to support both these claims is limited and ambiguous. Most literature concerns thin-walled chlamydospores and there is little evidence for the existence of thick-walled chlamydospores. There is a significant lack of knowledge as to the actual role these structures play in the long-term survival of P. cinnamomi.
Thick-walled chlamydospores
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Thin-walled chlamydospores
Thick-walled chlamydospores have an advantage in survival over thin-walled chlamydospores:
