☰

Pictorial Supplement to The Fifth Kingdom - Chapter 2b

Phyla Chytridiomycota (Kingdom Fungi)
and Oomycota (Kingdom Chromista)

(29 pictures)


Phylum Chytridiomycota (Kingdom Fungi)



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

Phylum Oomycota (Kingdom Chromista)



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


Go to Chapter 3a Go to Table of Contents

© Mycologue publications 2020