KINGDOM EUMYCOTA Phylum 3 - DIKARYOMYCOTA Subphylum ...
KINGDOM EUMYCOTA Phylum 3 - DIKARYOMYCOTA Subphylum ...
KINGDOM EUMYCOTA Phylum 3 - DIKARYOMYCOTA Subphylum ...
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3 characteristics of Ustilaginales (= Ustilaginomycetes):(1) haustoria<br />
and interactive vesicles; (2) simple septum with 2 caps; (3) saprobicparasitic<br />
alternation in life cycle.<br />
Primary interactive vesicles.<br />
Scale bar = 0.2 µm.<br />
Type 1<br />
long n+n phase.<br />
Typical for<br />
Basidiomycetes.<br />
local interaction zone (arrows)<br />
between fungus (lower cell) and its<br />
host (upper cell). Interaction<br />
structure(arrows) and deposit at host<br />
cell. Scale = 0.5 µm.<br />
Generalized life cycle of the Ustilaginomycetes.<br />
© R. Bauer and F. Oberwinkler 1997<br />
http://www.botany.hawaii.edu/faculty/wong/Bot201/Basi<br />
diomycota/Ustomycetes/Ustomycetes.htm<br />
http://botit.botany.wisc.edu/toms_fungi/march98.html<br />
Enlarged interaction zone<br />
between enlarged interaction<br />
zone between fungus and<br />
host. Haustorium (h).<br />
Scale = 2 µm<br />
http://tolweb.org/tree?group=Ustilaginomycetes&contgroup=Basidiomycota#cycle<br />
Transmission electron micrograph<br />
showing Ustilaginomycetes simple<br />
septal pore with two membrane caps.<br />
Scale = 0.1 µm. © R. Bauer 1997<br />
Symptom of corn smut is “tumor” - each ovary of female flower<br />
(collectively comprising the corn “cob” or “ear” undergoes increase in<br />
both cell size and cell number, termed hyperplasia.
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