Presencia de bacterias en el xilema de cafetos (Rubiaceae: Coffea arabica) afectados por la enfermedad conocida como "Crespera" / Bacterial present in the xylem of coffee (Rubiaceae: coffea arabica) by the well-known disease \"Crespera\"
Rev. biol. trop
; Rev. biol. trop;50(1): 45-48, Mar. 2002.
Article
em Es
| LILACS
| ID: lil-333051
Biblioteca responsável:
BR1.1
RESUMO
"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 micron diameter and 1-4 microns, length. The control plants did not show bacteria in the xylem.
Buscar no Google
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Doenças das Plantas
/
Café
/
Bactérias Gram-Negativas
Idioma:
Es
Revista:
Rev. biol. trop
Assunto da revista:
BIOLOGIA
/
MEDICINA TROPICAL
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Costa Rica
País de publicação:
Costa Rica