Monocyclic polycyclic.

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Presentation transcript:

monocyclic polycyclic

Agrios fig. 2-21

Myxomycetes – slime molds

Slime mold on turf – Physarum sp.

Sporangia of Physarum

Plasmodiophora brassicae Club root of cabbage Plasmodiophora brassicae

http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex8593

Plant Disease Cover Images Volume 87 (2003) Spongospora subterranea Powdery scab galls on roots and stolons of potato Obligate parasites Vectors for viruses Plant Disease Cover Images Volume 87 (2003)

http://www.potato.org.uk/images/site/suttonbridge/spud/PS2.jpg

Spore Type: Oospore Oospores

hairy flagella

Hyphae of Oomycetes Hypha

Oomycetes: Sexual Reproductive Antheridium Oospore Oogonium

Oomycete: Antheridium and Oogonium Hyphae Antheridium Oogonium

Asexual Reproductive Structures of Oomycetes Sporangia

Zoospores Single cell, but membrane bound Product of mitosis Released from sporangium Motile Not long lived Zoospores Sporangium

Sporangia Borne on Single or Branched Sporangiophores Lemon to globose shaped structures are sporangia

Zoospores attracted to infection court Plant surface Flagellum Body of zoospore

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