Ultrastructure of appressoria penetration phases on Stylosanthes guianensis by Colletotrichum gloeosporioides

Histopathology of compatible and incompatible interactions between two Colletotrichum gloeosporioides strains (type B) and five Stylosanthes guianensis genotypes has been studied qualitatively by transmission electron microscopy 24 to 72 h after inoculation. Penetration by hyphae issued from appress...

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Bibliographic Details
Published inParasitica (Belgium) Vol. 50; no. 3-4
Main Authors Munaut, F, Maraite, H. (Universite Catholique de Louvain, Louvain-la-Neuve (Belgium). Faculte des Sciences Agronomiques. Unite de Phytopathologie), Petre, B
Format Journal Article
LanguageEnglish
Published 1994
Subjects
ANTHRACNOSE
ANTRACNOSIS
COLLETOTRICHUM GLOEOSPORIOIDES
EPIDERME
EPIDERMIS
GENOTIPOS
GENOTYPE
HISTOPATHOLOGIE
HISTOPATOLOGIA
INFECCION
INFECTION
MICELIO
MICROSCOPIA
MICROSCOPIE
MYCELIUM
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
STYLOSANTHES GUIANENSIS
ULTRAESTRUCTURA
ULTRASTRUCTURE
ZONA SUBTROPICAL
ZONE SUBTROPICALE
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Summary:Histopathology of compatible and incompatible interactions between two Colletotrichum gloeosporioides strains (type B) and five Stylosanthes guianensis genotypes has been studied qualitatively by transmission electron microscopy 24 to 72 h after inoculation. Penetration by hyphae issued from appressoria was observed on transversal leaf sections. Alterations of the host cell wall, possibly of enzymatic origin, were observed just before and during penetration by the infection peg into the epidermal cell, after 48 to 72 h depending on the genotype. On both compatible and incompatible interactions, plant cell reactions occurred under the infection sites as cytoplasmic aggregation or deposition of a papilla on the inner surface of the epidermal cell wall. A matrix, not contrasted by the uranyl acetate and lead citrate, was noticed between the infection peg and the host plasmalemma.
Bibliography:H20
9501288
ISSN:0031-1812