Pictorial Supplement to The Fifth Kingdom - Chapter 2b

Phyla Chytridiomycota (Kingdom Fungi)
        and Oomycota (Kingdom Chromista) 
(29 pictures)
(the CD-ROM has full text and 45 pictures)

Chytridiomycota - Blastocladiales - zoospore of Allomyces (phase contrast illumination)    X 2000

Chytridiomycota - Chytridiales - eucarpic thallus of Rhizophydium in culture    X 500

Chytridiomycota - Chytridiales - Chytridium lagenaria: sporangium developing on a pollen grain of Pinus.  Time lapse sequence    X 500

Chytridiales - Chytridium releasing zoospores.    X 500

Chytridiales - Chytridium releasing uniflagellate zoospores    X 500

Chytridiales - Chytridium - empty sporangium on pine pollen grain.    X 500

Chytridiomycota - Chytridiales - wart of potato caused by Synchytrium endobioticum    X 1/3

Chytridiomycota - Chytridiales - sporangia of a eucarpic chytrid on the green alga, Spirogyra    X 100

Chytridiomycota - Chytridiales - sporangia of a chytrid on Ceratium, a planktonic dinoflagellate    X 200

Oomycota - the two flagella of a zoospore of Phytophthora palmivora (EM)

Oomycota - Saprolegniales - broad hyphae of Achlya growing from a hemp seed and producing, (1) long, white asexual zoosporangia and (2) round white sexual oogonia    X 8

Oomycota - Saprolegniales - zoosporangium    X 400

Oomycota -Saprolegniales - zoosporangia.    X 400 This and the slide above were submitted by Correspondence students in course Biology 422 as part of an assignment.

Oomycota - Saprolegniales - an oogonium containing several eggs.  Note the basal septum, and the thin-walled zones that facilitate penetration by antheridia. (Nomarski interference-contrast illumination).    X 400

Oomycota - Peronosporales - white rust of crucifers caused by Albugo candida    X 1

Oomycota - Peronosporales - vertical section through a sorus of Albugo producing chains of unicellular asexual sporangia from a basal layer of sporangiophores.    X 200

Oomycota - Peronosporales - sporangiophore of Peronospora with attached sporangia    X 200

Oomycota - Peronosporales - downy mildew of grape caused by Plasmopara viticola    X 1/3

Oomycota - Peronosporales - branched aerial sporangiophore of Plasmopara viticola    X 200

Oomycota - Peronosporales - vines near Beaune, France,  sprayed with a derivative of Bordeaux Mixture to prevent downy mildew

a billboard in Beaune for the fungicide

Oomycota - Peronosporales - late blight of potato caused by Phytophthora infestans

Oomycota - Peronosporales - the aerial sporangiophores of Phytophthora emerging from the potato leaves - a drawing made in 1847

Oomycota - Peronosporales - Phytophthora infestans - destitute Irish girls gleaning for food at the height of the potato famine - 1847

Oomycota - Peronosporales - Phytophthora infestans - people preparing to leave Ireland forever dueing the potato famine.

Oomycota - Peronosporales - Phytophthora infestans.   Monument to 187 Irish would-be immigrants to Canada, fleeing from the potato famine, who drowned just off the Gaspe Peninsula in 1847.

Oomycota - Peronosporales - blue mould of tobacco caused by Peronospora tabacina    X 1/4

Oomycota - Peronosporales - a branched aerial sporangiophore of Peronospora tabacina.    X 200

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