monocyclicpolycyclic. agrios fig. 2-21 myxomycetes – slime molds
TRANSCRIPT
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monocyclic polycyclic
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Agrios fig. 2-21
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Myxomycetes – slime molds
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Slime mold on turf – Physarum sp.
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Sporangia of Physarum
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Club root of cabbage
Plasmodiophora brassicae
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http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex8593
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Spongospora subterranea
Plant Disease Cover ImagesVolume 87 (2003)
Powdery scab galls on roots and stolons of potato
Obligate parasitesVectors for viruses
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http://www.potato.org.uk/images/site/suttonbridge/spud/PS2.jpg
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Spore Type: Oospore
Oospores
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hairy flagella
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Hyphae of Oomycetes
Hypha
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Oomycetes: Sexual Reproductive
Antheridium
Oogonium
Oospore
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Oomycete: Antheridium and Oogonium
Oogonium
Antheridium
Hyphae
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Asexual Reproductive Structures
of Oomycetes
Sporangia
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Zoospores
• Single cell, but membrane bound
• Product of mitosis
• Released from sporangium
• Motile• Not long lived
Sporangium
Zoospores
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Sporangia Borne on Single or Branched Sporangiophores
Lemon to globose shaped
structures are sporangia
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Zoospores attracted to infection court
Flagellum
Plant surface
Body ofzoospore