7 1-1-presentacion-cap-v
TRANSCRIPT
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“Oomycetes “Pseudohongos”
CONDICIONES:
I. En linage con algas cafés
II. Ultraestructura del flagelo:
“tripartite tubular”
(Dick, 2001)
STRAMENOPILES:
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2
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1
Kirk et al., 2008
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OOMYCETES: “PSEUDOHONGOS” (Kreisel, 1969,
Shaffer, 1975)
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CON FLAGELOS
OOMYCETES
TRIPARTITA TUBULAR
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3
2
4
1
Kirk et al., 2008
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CON FLAGELOS
TOPATOGENOS
OOMYCETES
TRIPARTITA TUBULAR
AL 2013: VER
FIGURA 1 EN
AdI et al.,
2013
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QUE SON DIATOMEAS?
DIATOMEAS A 40X (algas microscópicas con pared de silica)
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HONGOS FITOPATOGENOS FIT613
QUE SON ALGAS CAFES?
ALGAS CAFES
Durvillea antarctica
Nueva Zelanda
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Sargassum sp. (Océano Atlántico septentrional)
Mar de los Sargazos
Macro alga café
Sargassum sp. ALGA CAFE
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MORFO
LOGIA
DEL
ALGA
CAFE
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OO
GO
NIO
ANTERIDIO
ZOOSPORAS
BIFLAGELADAS
Fucus sp. ALGA CAFE
SIMILARIDAD CON OOMYCETOS??
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ESPORANGIO
Ectocarpus sp.
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(tinsel)
OOMYCETES: zoosporas FLAGELO
biflageladas FILAMENTOSO
FLAGELO LISO
(whiplash )
POSICION VENTRAL
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DORSAL
POSTERIOR ANTERIOR
nucleus kinetosome
nuclear
beak kinetosome
boss
whiplash
flagellum \ straminlpllous
/ flagellum
ventral groove
VENTRAL
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Dick, 2001
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Ultraestructura del flagelo
anterior
filamentos “tripartite tubular”
TRES PARTES: 1, 2, 3
(ver figura parte derecha inferior
)
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-p O S T E R·1 O R AN T ER I OR
klnetosome nucleus
klnetosome . boss
'
nuclear
beak ·
V ENTRA/
/
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Saprolegniales
Saprolegniaceae
Saprolegnia parasitica (parásito de peces, etc.)
Aphanomyces euteiches (causa pudrición de raíz en chicharo)
Z = ZOOSPORAS OS = OOSPORA
ZS = ZOOSPORANGIO A = ANTERIDIO OG = OOGONIO
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Peronosporales Peronosporaceae
Sclerospora
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Pythiales
Pythiaceae
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Peronosporales
Albuginaceae
Albugo
Peronosporaceae
Bremia
Peronospora
Plasmopara
Pseudoperonospora
Pythiales
Pythiaceae
Pythium
Phytophthora
TIPOS DE ESPORANGIO ZOOSPORAS
VESICULA
TUBO
FILAMENTOSO
Erwin and Ribeiro, 1996 FIT613
LOBULADO O
TORULOSO
ESFERICO
TERMINAL E
INTERCALADO
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ESPORANGIO LOBULADO O
TORULOSO
A. HYPOGYNOUS-DICLINOUS (POSICION DEL ANTERIDIO EN OOGONIO)
B. PARAGYNOUS-MONOCLINUS (ambos en misma hifa)
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POSICION DE ANTERIDIOS EN OOGONIO (C-F) U
OOSPORA (A, B)
en Pythium) A.HYPOGYNOUS, PLEROTICO (sólo
Py.
,
Phy.
)
B. PARAGYNOUS, APLEROTICO (en
A,
E:
F:
B, C, D: MONOCLINOUS (anteridio misma hifa)
DICLINOUS (anteridio hifa diferente)
AMPHIGYNOUS (anteridio), sólo en Phytophthora
Kirk et al., 2001
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TIPOS DE
ESPORANGIOS
1. FILAMENTOSO
(Erwin and Ribeiro, 1996)
2. LBULADOS TORULADOS
O
3. ESFERICOS- terminales
4. ESFERICOS- intercalados
HONGOS
FITOPATOGENOS
FIT613
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LISOS
EQUINULA
DOS
(Erwin and Ribeiro, 1996)
O
O
G
O
N
I
O
S
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OOSPORA Y ANTERIDIO
(Erwin and Ribeiro, 1996)
O
O
S
P
O
R
A
S
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UNO
VARIOS
(Erwin and Ribeiro, 1996)
A
N
T
E
R
I
D
I
O
S
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·..····
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HONGOS FITOPATOGENOS FIT613