Download - 5 b 2-5-presentacion-cap-iii
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COLEGIO DE POSTGRADUADOS-HF-FIT613
HUITLACOCHE - Ustilago maydis
Ustilago maydis (envasado comercial)
-no basidiocarpo,
-forma fíbulas
-basidio segmentado y,
-basidio no segmentado
COMPARATIVOS BASIDIOS ENTRE ROYAS Y CARBONES
AGARICOMYCETES
►
SEPTADO
CARBONES
Kendrick, 2000
NO SEPTADO
BASIDIOSPORA
INFECTA PRINCIPALMENTE EL EMBRION
EMBRION
TELIOS
PORAS
GRANO MAIZ
CARBON PARCIAL (carbón karnal) Tilletia indica
(cuarentenado por
SAGARPA Y EPPO)
SORI
COLEGIO DE POSTGRADUADOS-HF-FIT613
Ustilago nuda SANA
CON CARBON
Agrios, 2005
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Tilletia tritici SANA vs CON CARBON
GRANO
ENFERMO
SORI
LISAS
Tilletia indica
(cuarentenado)
TELIOSPORAS
ORNAMENTA
DAS
Tilletia tritici
Tilletia laevis
VER DATOS
EN
SIGUIENTE
DIAPOSITI
VA
A.COMMON BUNT, Tilletia tritici
B. LOOSE SMUT, Ustilago tritici
C. LOOSE SMUT, INFECTADO EMBRION
D-G. CORN SMUT, Ustilago maydis
Basidium & basidiospores
Young Mature
spore
Yeast like
reproduction
Parasi ti c
hypha
l spore
\ \
G0} : 1 •• 1 " l n:J
Karyogamy Meiosis Plasmogarny
Dikaryophase
====
Diplophase Haplophase Dikaryophase
== ========
A N A M O R F O TIPO LEVADURA
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I. USTILAGINOMYCETES (Vánky, 2000):
II. PLANTA PATOGENO-INTERACCION (varios tipos). Ej.:
◄
CARBONES: FORMA VESICULAS EN
Sphacelotheca polygoni
HAUSTORIO
•
/ /
/
/ /
' '-.,.
Ustilago
maydis
SOROS
(agallas)
Ustilago maydis
Ustilago maydis
Herrera y Ulloa,
1998
HETEROTALICO
CON TETRAPOLAR
“MATING TYPE
SYSTEM”
.• ji, .....:#:/ · ..
Bas1diospores infect young' 1 Dikaryotic mycelium
infects kernel
through silk
plants or growing tissues
ofolderpl f' -
A. ·r are i nfected
through the silk
'ti o o /f .
.,;d;o<poce<
{'<-
"••
Com plant with galls
Dikaryotic cells
of mycelium become
tel iospores in gall
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x
\\ r· Myceil um reaches and
,\ 1 \ f. follows growing point of
·ti plant \·1/
\ 1
\f Primary sporidia
fuseto form H-shaped Á_/'( r'"- Mycelium penetrates
seedling directly and
grows between cells Dikaryotic mycelium
from secondary
sporidium attacks
wheat seedling lntercellular
mycelium Secondary
sporidium
germinales
u f -- Uninucleate
p<;m"y <pmid;,
V Basidium
W'Germinating teliospore Healthy
wheat head
Z'ygote
Teliospores on germinating Mycelialcells
are transformed Smutted kernels
G··¡
\ (
Q
wheatrknel break upon harvest and contam1na
te
1 •
(j) ":""'wOo'" "•'•
\11 Smutted wheat kernel
full of teliospores
/
06 f
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UNA ► TELIOSPORA
EN SEMILLA
Mycellium follows
growth of growing
\ point of plant
intercellularly
Mycelial cells in kernels
become teliospores
Kernels of infected
plants are filled ; Mycelium invades
young seedlings
intracellularly
with teliospores-............:
Telliospore germinates
on flower. Dikaryotic
mycelium infects ovary
Mycelium overwinters
in the embryo of
infected cereal kernels
/ Kernelmembranebreaks.
Teliospores blown away
by air currents
Teliospores land
on flowers of healthy plants
Mycelium invades
parts of embryo in seed
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COSECHA MASA AEREA DE TELIOSPORAS
Table 5.1 Difl'erences between Rust and Smut Fungi
Uredinales Ustilaginales
1) Teliospores terminal Teliospores intercalary
2) Basidiospores 4, shot from
sterigmata Basidiospore number variable, not on
sterigmata, not discharged
3) Spermagonia produced ( sex
organs) No sex organs, any two compatible cells
can fuse
4) Clamp connections absent Clamp connections common
5) Often require 2 hosts Never require 2 hosts
6) Obligately biotrophic Facultatively biotrophic, yeast-Iike in culture
7) Infections usually localized Infections usually systemic
8) Teliospores in telial sori, location
unspecific Teliospores replace host organ, e.g., ovary,
anther
9) Attack fems, gymnosperms and Attack only angiosperms
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