Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri

Moniliasis of cocoa is an important disease caused by the fungus Moniliophthora roreri (Cif & Park) (Evans et al 1978). A study was conducted on the external features of fruits of two cocoa cultivars with different degrees of susceptibility to M. roreri also a comparative study of the exocar...

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Authors: Flores, Dora, Ramírez, Carlos, Galindo, José J.
Format: article
Status:Published version
Publication Date:1994
Country:Costa Rica
Institution:Universidad de Costa Rica
Repository:Portal de Revistas UCR
Language:English
OAI Identifier:oai:portal.ucr.ac.cr:article/28689
Online Access:https://revistas.ucr.ac.cr/index.php/rbt/article/view/28689
Access Level:Open access
Keyword:Moniliasis
Moniliophthora roreri
Theobroma cacao pod structure
id CR_5e19cf80848cd4ffe84ceff40d2b9ece
oai_identifier_str oai:portal.ucr.ac.cr:article/28689
network_acronym_str CR
network_name_str Costa Rica
repository_id_str
dc.title.none.fl_str_mv Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
title Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
spellingShingle Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
Flores, Dora
Moniliasis
Moniliophthora roreri
Theobroma cacao pod structure
title_short Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
title_full Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
title_fullStr Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
title_full_unstemmed Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
title_sort Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreri
dc.creator.none.fl_str_mv Flores, Dora
Ramírez, Carlos
Galindo, José J.
author Flores, Dora
author_facet Flores, Dora
Ramírez, Carlos
Galindo, José J.
author_role author
author2 Ramírez, Carlos
Galindo, José J.
author2_role author
author
dc.subject.none.fl_str_mv Moniliasis
Moniliophthora roreri
Theobroma cacao pod structure
topic Moniliasis
Moniliophthora roreri
Theobroma cacao pod structure
description Moniliasis of cocoa is an important disease caused by the fungus Moniliophthora roreri (Cif & Park) (Evans et al 1978). A study was conducted on the external features of fruits of two cocoa cultivars with different degrees of susceptibility to M. roreri also a comparative study of the exocarp tissues of healthy fruits was conducted. Scanning Electron Microscopy (SEM) and High Resolution Optical Microscopy (HROM) were used respectively. For SEM, sixty-day-old healthy fruits of cvs Pound-7 (susceptible) and UF-296 (moderately resistant) were collected from CATIE's germplasm collection in Turrialba and La Lola, Costa Rica. Apparently, no external anatomic differences between the fruits of the Pound 7 and the UF-296 (moderately resistant) cultivars exist, except for the star-like trichomes in the latter. Both show an alveolar epidemis on which there are noticeable anomocitic-type stomata and a large number of glandular trichomes. For HROM, healthy Pound-7 and UF-296 fruits from La Lola were used, as well as cv. UF-273 resistant to the pathogen. The major histological feature of cv UF-273 and UF-296 was a cellular arrangement of the subepidermic parenchyma which was more compact, probably containing larger amounts of phenolic substances in the vacuoles, as compared to the Pound 7.
publishDate 1994
dc.date.none.fl_str_mv 1994-08-01
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
Article
artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://revistas.ucr.ac.cr/index.php/rbt/article/view/28689
url https://revistas.ucr.ac.cr/index.php/rbt/article/view/28689
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://revistas.ucr.ac.cr/index.php/rbt/article/view/28689/28669
dc.rights.none.fl_str_mv Derechos de autor 1994 Revista de Biología Tropical
http://creativecommons.org/licenses/by/4.0
acceso abierto
http://purl.org/coar/access_right/c_abf2
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Derechos de autor 1994 Revista de Biología Tropical
http://creativecommons.org/licenses/by/4.0
acceso abierto
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad de Costa Rica
publisher.none.fl_str_mv Universidad de Costa Rica
dc.source.none.fl_str_mv Revista de Biología Tropical; Vol. 42 No. S2 (1994): Volume 42 – Supplement 2 – August 1994: An electron microscope view of tropical nature: selected studies; 29–37
Revista de Biología Tropical; Vol. 42 Núm. S2 (1994): Volumen 42 – Suplemento 2 – Agosto 1994: La naturaleza tropical vista al microscopio electrónico: estudios selectos; 29–37
Revista Biología Tropical; Vol. 42 N.º S2 (1994): Volumen 42 – Suplemento 2 – Agosto 1994: La naturaleza tropical vista al microscopio electrónico: estudios selectos; 29–37
2215-2075
0034-7744
10.15517/rbt.v42i2
reponame:Portal de Revistas UCR
instname:Universidad de Costa Rica
instacron:UCR
instname_str Universidad de Costa Rica
instacron_str UCR
institution UCR
reponame_str Portal de Revistas UCR
collection Portal de Revistas UCR
repository.name.fl_str_mv Portal de Revistas UCR - Universidad de Costa Rica
repository.mail.fl_str_mv jorge.polanco@ucr.ac.cr
_version_ 1849325380558651392
spelling Ultrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreriUltrastructure of cocoa fruits (Theobroma cacao) of cultivars with contrasting susceptibility to Moniliophthora roreriFlores, DoraRamírez, CarlosGalindo, José J.MoniliasisMoniliophthora roreriTheobroma cacao pod structureMoniliasis of cocoa is an important disease caused by the fungus Moniliophthora roreri (Cif & Park) (Evans et al 1978). A study was conducted on the external features of fruits of two cocoa cultivars with different degrees of susceptibility to M. roreri also a comparative study of the exocarp tissues of healthy fruits was conducted. Scanning Electron Microscopy (SEM) and High Resolution Optical Microscopy (HROM) were used respectively. For SEM, sixty-day-old healthy fruits of cvs Pound-7 (susceptible) and UF-296 (moderately resistant) were collected from CATIE's germplasm collection in Turrialba and La Lola, Costa Rica. Apparently, no external anatomic differences between the fruits of the Pound 7 and the UF-296 (moderately resistant) cultivars exist, except for the star-like trichomes in the latter. Both show an alveolar epidemis on which there are noticeable anomocitic-type stomata and a large number of glandular trichomes. For HROM, healthy Pound-7 and UF-296 fruits from La Lola were used, as well as cv. UF-273 resistant to the pathogen. The major histological feature of cv UF-273 and UF-296 was a cellular arrangement of the subepidermic parenchyma which was more compact, probably containing larger amounts of phenolic substances in the vacuoles, as compared to the Pound 7.La moniliasis del cacao es una enfermedad importante causada por el hongo Moniliophthora roreri (Cif. & Park) Evans et al. Se llevó a cabo un estudio sobre las características externas de frutos de dos cultivares de cacao condiferentes grados de susceptibilidad a M. roreri; también se realizó un estudio comparativo de los tejidos del exocarpo de frutos sanos. Para el análisis de los tejidos se usó Microscopía Electrónica de Rastreo (MER) y microscopía de luz de alta resolución (MOAR). Para MER, frutos sanos de 60 días de edad de los cultivares Pound-7 (susceptible) y UF-296 (moderadamente resistente) fueron colectados del banco de germoplasma que el CATIE posee en Turrialba y La Lola, Costa Rica. Aparentemente no existen diferencias anatómicas entre los frutos del cultivar Pound-7 y el cultivar UF-296, excepto el tipo de tricoma estrellado presente únicamente en el cultivar UF-296. Ambos muestran una epidermis alveolar en la cual hay estomas del tipo anomocítico y una gran cantidad de tricomas glandulares. Para MOAR, se usaron frutos sanos de Pound-7 y UF-296 provenientes de la Lola, así como frutos del cultivar UF-273 resistente al patógeno. La principal característica histológica de los cultivares UF-273 y UF-296 fue el arreglo celular del parénquima subepidérmico, el cual fue más compacto y probablemente contenía mayores cantidades de sustancias fenólicas en las vacuolas, comparados con el Pound-7.Universidad de Costa Rica1994-08-01info:eu-repo/semantics/publishedVersionArticleartículo originalhttp://purl.org/coar/resource_type/c_2df8fbb1info:eu-repo/semantics/articleapplication/pdfhttps://revistas.ucr.ac.cr/index.php/rbt/article/view/28689Revista de Biología Tropical; Vol. 42 No. S2 (1994): Volume 42 – Supplement 2 – August 1994: An electron microscope view of tropical nature: selected studies; 29–37Revista de Biología Tropical; Vol. 42 Núm. S2 (1994): Volumen 42 – Suplemento 2 – Agosto 1994: La naturaleza tropical vista al microscopio electrónico: estudios selectos; 29–37Revista Biología Tropical; Vol. 42 N.º S2 (1994): Volumen 42 – Suplemento 2 – Agosto 1994: La naturaleza tropical vista al microscopio electrónico: estudios selectos; 29–372215-20750034-774410.15517/rbt.v42i2reponame:Portal de Revistas UCRinstname:Universidad de Costa Ricainstacron:UCRenghttps://revistas.ucr.ac.cr/index.php/rbt/article/view/28689/28669Derechos de autor 1994 Revista de Biología Tropicalhttp://creativecommons.org/licenses/by/4.0acceso abiertohttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccess2023-08-30T20:53:42Zoai:portal.ucr.ac.cr:article/28689Portal de revistashttps://revistas.ucr.ac.cr/Universidadhttp://www.ucr.ac.crhttps://revistas.ucr.ac.cr/index.php/index/oaijorge.polanco@ucr.ac.crCosta RicaNo aplicaNo aplicaNo aplicaopendoar:2025-08-13T10:23:05.873Portal de Revistas UCR - Universidad de Costa Ricafalse
score 15,811543

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