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Eukaryota Stramenopiles Oomycetes Peronosporales --------------------------------- P 3 hytophthora
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Transcript of 7 1-2-presentacion-cap-v
Eukaryota
Stramenopiles
Oomycetes
Peronosporales
---------------------------------
P3hytophthora
DIAGNOSTICO:1876 Heinrich Anton De Bary
tans Phytophthora infestans )
1831-1888
Heinrich Anton de Bary
Heinrich Anton de Bary
Nacimiento
26 de enero de 1831. Fráncfort del Meno
Fallecimiento
19 de enero de 1888. Estrasburgo
Nacionalidad Alemán
Ocupación Cirujano, botánico, microbiólogo, algólogo, y micólogo
Padres August Theodor de Bary y de Emilie Meyer
Phytophthora: -causa ahogamiento o -damping-off, -secadera de plantas, árboles -atizonamiento. -enfermedades de raíz en almácigo plántula
y
-Habitad: -en algunas especies-suelo con alto contenido de humedad, acuático
-otras especies-humedad en partes aéreas de la planta (Ej. P. infestans de Bary)
-raro saprofítico.
Sporangium
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MICELIO:
HINCHADO
TORULOSO ·
P. .capsici
P.cinnamomi ...•'• ...... :, ;;.., ·--·-..
Erwin and Ribeiro, 1996
o
REPRODUCCION ASEXUAL ZOOSPORAS
ESPORANGIOS
Erwin and Ribeiro, 1996
uroonifonn Obpyrilonn
()boVOid GlobOSe
lnlercalary Pyrilonn E!lipsoid
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PAPILADO P R O L I F E R A D O S
EXTENDI
DO
ANIDADO
EXTENDIDO
ANIDADO
Erwin and Ribeiro, 1996
S I M P O D I A L: A, B, C
UMBELADO
COMPUESTO SIMPLE
Erwin and Ribeiro, 1996
Erwin and Ribeiro, 1996
Erwin and Ribeiro, 1996
OOGONIO S E X U A L
AMPHIGYNOUS
(anteridio posición) PARAGYNOUS
(anteridio posición) (posiciòn anteridio)
PARAGYNOUS
DICLINOUS Kirk et al., 2008
Pythium
COLONIA
MORFOLOGIA Phytophthora
(oogonio) (oospora plerótica)
Pythium sp. )
Kirk et al., 2008
Erwin and Ribeiro, 1996
HYPOGYNOUS AMPHIGYNOUS PARAGYNOUS
(oospora aplerótica
Gcmetangrar delimilalion Expons1on
a Ooqoniol woll lhickeninq
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OOPLASMA PERIPLASMA
VA
CUO
LAS OO
PLAS
TO LIPI
DOS
2 3
Erwin and Ribeiro, 1996
o
o
S
p
H
E
R
E
Erwin and Ribeiro,1996
NUCLEO “2n” 3. OOSPORA
Erwin and Ribeiro, 1996
\
'' ''\
' \ \ \
'\
Haplopha$C
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Phytophthora infestans
o
ASEXUAL
2n
- MiceBlio en hospedero
o / Ñ
Quiste
" 1
<=XUAL / Meiosis
Esporangio
?ospora
e}" Germinación
- de oospora
- Plasmogamia
V Cariogamia
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ZOOSPoRES
7'
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Tabla 4.2.Asexualchar
acterlstlcs of Phytophthora specles 8
SPECIES NAME
t t ! E ...... ! 1 1
.S ...
i •
i
>4
aaal
6
11
ea e a E tl o
)(
{J. a:¡
.
.
+
1.3 25-40 p +1· Simple sympodlal Ovold-obpyriform 19·55 16-46 38 X 26 + e p 16-66 15·44 41 X 32 1.3 + Ovold·ellipsold·globose 18 1-e 01+ Simple sympodlal
p 31-71 28·40 49 x36 1.4 31 Sphericalto ovold • Lax sympodial
Slrfllle sympodlal
•
Ovokf-elllpsold Irregular . +1· 3o.72 22·51 48x37 1.3 28.7 p 38 • • •
Ovold-obpyri!orm Simple sympodlal 14·56 11·38 39 X 29 1.3 37 p • •
Ovold-obturbinate p Unbranched 35-45 28·35 39 x22 1.2 55 + • •
No data • •
SPORANGIA
:l
o.
....
&!
I
ll
1
.... j!
o.
al
Cll
-
5
3
.....
...
¡:
...
.....
:1.
al Ol
e al > e(
;:
al .:J
.o
='ª
o.
g
o.
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IDENTIFICA
CION
MORFOLO
GICA
IDENTIFICACION
MORFOLOGICA + MOLECULAR (Gallegly and Hong, 2008)
Erwin and Ribeiro, 1996
Table 4.7. Differences between Phytophthora and Pythíuma
Characteristic Phytophthora Pythium
Sporangium shape Usually ovoid or obpyriform; seldom globose. Filamentous, inflated hyphae, sphcrical, occasionally ovoid or pyriform.
Terminal or intcrcalary.
No Always persistent.
Protoplasrn (undifferentiated) flows from thc sporangiurn into a vesicle in which zoospores differentiate.
Fine and flexuous (5-10 J.lm wide). Paragynous or hypogynous. Never amphigynous.
Can be one or rnany and attached to any part of the
oogoniurn. Smooth or spiny. Colorlcss walls.
Sporangium position Sporangium apical thickening (papilla) Sporangium caducity Zoospore differentiation
Always terminal. Yes Caducous (deciduous) or persistcnt. Protoplasm differentiates into zoospores within the
sporangium.
Coarse and stiffly branched (6-14 J.lffi wide).
Amphigynous or paragynous; if paragynous attached only to thc lower hemisphere.
Smooth oc in a few species, omamented. Pigmented
walls. Plerotic or aplerotic. Yes Yes Yes
Oospore Chlamydospores Hyphal swellings Thiamine requirement
Plerotic or aplerotic. Yes
Rare No (cxcept for P vexans, which requires thiarnine
for growth). Soil or aquatic; saprophytic or facultatively para
sitie. Habitat Soil or aquatic; aerial parts of plants; rarely
saprophytic. Addition of hymexazol (3-hydroxy-5-
methylisoxazole) to isolation medium Host specificity
Sorne species are not inhibited. Spccific or with a wide host rangc, depending on
species.
Many species are inhibited. Nurnerous hosts, rarely host specific.
a Adaptcd from Ribeiro (1978) by pcrmission of AR Gantncr Verlag, Vaduz.
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