2. Heinrich Anton De Bary
1831-1888 )
DIAGNOSTICO:1876
Phytophthora infestans tans
3. 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
4. Phytophthora: -causa ahogamiento o
-damping-off,
-secadera de plantas, árboles
-atizonamiento.
-enfermedades de raíz en almácigo y
plántula
-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.
22. Tabla 4.2.Asexualchar
SPECIES NAME
acterlstlcs of Phytophthora specles
....
IDENTIFICA
CION
!
.S
...
a
a
l
t t1
1
ll
&!
ea
i
o.
11
•
+1· 25-40
18
+
6
MORFOLO
GICA
o
)(
{J.
31
:l
aE
Simple sympodlal
Simple sympodlal
•
SPORANGIA
8
I
....
!
j!
1i
o.
al
Cll
5
3
.....
...
.....
E
:1.
......
¡:
tl
al
...
a:¡
al
.o
Ol
e
;:
>
e(
al
e
='ª
.:J
o.
+
>4 Ovold-obpyriform
19·55
16-46
38 X 26 1.3
p
e
1-e Ovold·ellipsold·globose 16-66
15·44
41 X 32
1.3
p
01+
•
Lax sympodial
Sphericalto ovold
31-71
28·40
49 x36
1.4
p
. +1·
37
55
+
•
28.7
•
•
Ovokf-elllpsoldIrregular 3o.72
22·51
48x37
1.3
p
Simple sympodlal
•
Slrfllle sympodlal
•
•
Ovold-obpyri!orm
14·56
11·38
39 X 29
1.3
p
Unbranched
•
Ovold-obturbinate
35-45
28·35
39 x22
1.2
p
No data
38
•
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
•
g
o.
.
.
+
24. Table 4.7. Differences between Phytophthora and Pythíuma
Characteristic
Phytophthora
Sporangium shape
Usually ovoid or obpyriform; seldom globose.
Sporangium position
Sporangium apical thickening (papilla)
Sporangium caducity
Zoospore differentiation
Oospore
Chlamydospores
Hyphal swellings
Thiamine requirement
Habitat
Addition of hymexazol (3-hydroxy-5methylisoxazole) to isolation medium
Host specificity
a
Pythium
Filamentous, inflated hyphae, sphcrical, occasionally
ovoid or pyriform.
Always terminal.
Terminal or intcrcalary.
Yes
No
Caducous (deciduous) or persistcnt.
Always persistent.
Protoplasm differentiates into zoospores within the
Protoplasrn (undifferentiated) flows from thc
sporangium.
sporangiurn into a vesicle in which zoospores
differentiate.
Coarse and stiffly branched (6-14 J.lffi wide).
Fine and flexuous (5-10 J.lm wide).
Amphigynous or paragynous; if paragynous attached Paragynous or hypogynous. Never amphigynous.
only to thc lower hemisphere.
Can be one or rnany and attached to any part of the
oogoniurn.
Smooth oc in a few species, omamented. Pigmented Smooth or spiny. Colorlcss walls.
walls.
Plerotic or aplerotic.
Plerotic or aplerotic.
Yes
Yes
Yes
Rare
Yes
No (cxcept for P vexans, which requires thiarnine
for growth).
Soil or aquatic; aerial parts of plants; rarely
Soil or aquatic; saprophytic or facultatively parasaprophytic.
sitie.
Sorne species are not inhibited.
Spccific or with a wide host rangc, depending on
species.
Adaptcd from Ribeiro (1978) by pcrmission of AR Gantncr Verlag, Vaduz.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Many species are inhibited.
Nurnerous hosts, rarely host specific.
