Presencia de bacterias en el xilema de cafetos (Rubiaceae: Coffea arabica) afectados por la enfermedad conocida como “Crespera”

 

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Detalles Bibliográficos
Autores: Vargas Cartagena, Luis, Sánchez, Ethel, Vargas, Maribel, Solórzano, Arturo, Hernández, Francisco, Iwasawa, Haruo, Freer, Enrique
Formato: artículo original
Estado:Versión publicada
Fecha de Publicación:2002
Descripción:“Crespera” is an infectious disease of coffee plants that affects both the coffee production and the economy of the coffee producer countries. This disease affects morphologically the plant: long and narrow leaves with wavy borders and marginal necrosis; strong chlorosis results in drying of the leave, and leads to bad conditions of the plant. The internodes are short, producing the appearance of multiple sprouts in the axial sprout, the flowers can turn greenish, and the plant can present branches with severe symptoms, and branches without apparent symptoms at the same time. As a result, the coffee bean production decreases strikingly. The aim of this work was to determine the occurrence of the possible causative agent in the coffee plants using transmission electron microscopy. Normal and infected plants were compared looking at the leaves, central vein, lateral veins and petiole. It was determined that xylematic vessels show the presence of gram negative bacilliform bacteria (of thick-wavy walls), with dimensions of 0.3-0.5 μm diameter and 1-4 μm, length. The control plants did not show bacteria in the xylem.
País:Portal de Revistas UCR
Institución:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Lenguaje:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/16151
Acceso en línea:https://revistas.ucr.ac.cr/index.php/rbt/article/view/16151
Access Level:acceso abierto
Palabra clave:coffee
crespera
gram negative bacteria
xylem
ultrastructure
phytopathology