Publicado

2026-03-04

Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)

Estudio histopatológico del endófito Colletotrichum tropicale en fruto maduro de mango (Mangifera indica L. cv. Azúcar)

DOI:

https://doi.org/10.15446/abc.v31n1.121807

Palabras clave:

Anthracnose, Astra blue-fuchsin, Hemibiotroph, Postharvest, Quiescence (en)
Antracnosis, Astra blue-fucsina, Hemibiótrofo, Poscosecha, Quiescencia (es)

Autores/as

The mango cv. Azúcar is an economically important crop in the Magdalena region of Colombia. However, it is particularly affected during the postharvest stage by anthracnose, a disease caused by the phytopathogen Colletotrichum, with C. tropicale being an endophyte that can become highly virulent when inoculated into ripe fruits. The pathogenic process at the cellular level that allows this lifestyle shift remains poorly understood. This study aimed to histologically characterize the pathogenic process of the endophyte C.  tropicale in ripe fruit of the mango cv. Azúcar. Fruits at phenological stage 801 were inoculated with the fungus at 0, 12, 24, and 36 hours post-inoculation (hpi), three for each time point with an absolute control. Histological sections were prepared in paraffin, stained with Astra blue–fuchsin, and observed under a light microscope. At 12 hpi, conidial germination and the formation of melanized appressoria on the cuticle were evident, as well as the emergence of thick hyphae in the epidermis, indicating the onset of a biotrophic phase (quiescence). At 24 hpi, secondary hyphae were observed invading parenchyma cells, marking the beginning of the necrotrophic phase. By 36 hpi, total cell destruction was evident. The endophyte C.   tropicale behaves as a hemibiotroph, allowing it to act as a pathogen through a brief quiescent phase in ripe fruits of the mango cv. Azúcar.

El mango cv. Azúcar es un cultivo de importancia económica en el departamento del Magdalena, Colombia; sin embargo, se ve afectado, especialmente en poscosecha, por la antracnosis, enfermedad ocasionada por el fitopatógeno Colletotrichum, siendo la especie C. tropicale un endófito que puede volverse altamente virulento al ser inoculado en frutos maduros, sin que se conozca con claridad el proceso patogénico que desarrolla a nivel celular y que le permite cambiar su estilo de vida. El objetivo de este estudio fue caracterizar histológicamente el proceso patogénico del endófito C. tropicale en fruto maduro de mango cv. Azúcar. Se inocularon frutos en estado fenológico 801 con el hongo a las 0, 12, 24 y 36 horas posteriores a la inoculación (hpi), tres por cada tiempo con un testigo absoluto y se realizaron cortes histológicos en parafina, los cuales fueron teñidos con Astra blue-fucsina y observados al microscopio óptico. A las 12 hpi se evidenció la germinación de conidias y la formación de apresorios melanizados sobre la cutícula, así como la aparición de hifas gruesas en la epidermis, lo que indica el inicio de una fase biotrófica (quiescencia). A las 24 hpi se observó la invasión de las células del parénquima por hifas secundarias, dando inicio a la fase necrotrófica, y a las 36 hpi fue evidente la destrucción total de las células. El endófito C. tropicale se comporta como un hemibiótrofo, lo que le permite actuar como patógeno mediante una quiescencia corta en frutos maduros de mango cv. Azúcar.

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Cómo citar

APA

Quintero-Mercado, A. F., Páez-Redondo, A. R. & García-Domínguez, C. (2026). Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar). Acta Biológica Colombiana, 31(1). https://doi.org/10.15446/abc.v31n1.121807

ACM

[1]
Quintero-Mercado, A.F., Páez-Redondo, A.R. y García-Domínguez, C. 2026. Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar). Acta Biológica Colombiana. 31, 1 (ene. 2026). DOI:https://doi.org/10.15446/abc.v31n1.121807.

ACS

(1)
Quintero-Mercado, A. F.; Páez-Redondo, A. R.; García-Domínguez, C. Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar). Acta biol. Colomb. 2026, 31.

ABNT

QUINTERO-MERCADO, A. F.; PÁEZ-REDONDO, A. R.; GARCÍA-DOMÍNGUEZ, C. Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar). Acta Biológica Colombiana, [S. l.], v. 31, n. 1, 2026. DOI: 10.15446/abc.v31n1.121807. Disponível em: https://revistas.unal.edu.co/index.php/actabiol/article/view/121807. Acesso em: 13 mar. 2026.

Chicago

Quintero-Mercado, Andrés Felipe, Alberto Rafael Páez-Redondo, y Celsa García-Domínguez. 2026. «Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)». Acta Biológica Colombiana 31 (1). https://doi.org/10.15446/abc.v31n1.121807.

Harvard

Quintero-Mercado, A. F., Páez-Redondo, A. R. y García-Domínguez, C. (2026) «Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)», Acta Biológica Colombiana, 31(1). doi: 10.15446/abc.v31n1.121807.

IEEE

[1]
A. F. Quintero-Mercado, A. R. Páez-Redondo, y C. García-Domínguez, «Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)», Acta biol. Colomb., vol. 31, n.º 1, ene. 2026.

MLA

Quintero-Mercado, A. F., A. R. Páez-Redondo, y C. García-Domínguez. «Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)». Acta Biológica Colombiana, vol. 31, n.º 1, enero de 2026, doi:10.15446/abc.v31n1.121807.

Turabian

Quintero-Mercado, Andrés Felipe, Alberto Rafael Páez-Redondo, y Celsa García-Domínguez. «Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar)». Acta Biológica Colombiana 31, no. 1 (enero 22, 2026). Accedido marzo 13, 2026. https://revistas.unal.edu.co/index.php/actabiol/article/view/121807.

Vancouver

1.
Quintero-Mercado AF, Páez-Redondo AR, García-Domínguez C. Histopathological study of the endophyte Colletotrichum tropicale in ripe mango fruit (Mangifera indica L. cv. Azúcar). Acta biol. Colomb. [Internet]. 22 de enero de 2026 [citado 13 de marzo de 2026];31(1). Disponible en: https://revistas.unal.edu.co/index.php/actabiol/article/view/121807

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