Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire
Anthracnose caused by Colletotrichum species is the most important field and postharvest disease infecting mango worldwide. A survey was conducted in the seven mango producing districts in the north of Côte d'Ivoire to identify and characterize Colletotrichum species isolates associated with mango leaves necrosis and fruit rots. A total of 70 isolates were identified based on morphological and cultural characters. Most of isolate colour were grey or grey whitish (36%), cottony (71%) with cylindrical conidia (97%) rounded on both ends (57%). Three texture types were observed in colonies of the seventy isolates. Most of the isolates were cottony (71%) followed by abundant aspect (23%) and closely appressed (6%). According to conidia shape, two species of Colletotrichum; Colletotrichum gloeosporioides (97%) and C. acutatum(3%) were identified in the seventy isolates. Conidia length and width varied respectively from 15.4to 19.7μm and 4.8 to 5.2 μm. The Average Linear Growth Rate (ALGR) 7 days after culture varied from 0.76 to 0.91 cm day-1. Multivariate analysis grouped the 70 isolates into four morphotypes containing, respectively: 5 (7%), 7 (10%), 17 (24%) and 41 (59%) isolates. Isolates of morphotype 1 were characterized by whitish obverse and reverse colour with an abundant mycelia aerial aspect. The second morphotypes were represented by isolates with obverse and reverse brownish grey colour and contained both conidia with two rounded ends, and one rounded and one sharped ends. The third morphotype consisted of isolates with obverse and reverse grey whitish colour. The fourth morphotype consisted of isolates with obverse and reverse respectively dark grey and grey or vice versa. Conidial length and width of morphotypes varied, respectively, from 14.5 to 17.2 μm and 4.6 to 5.2 μm. ALGR of morphotypes varied from 0.84 to 0.87 μm day-1. The present study highlighted that morphological variation of Colletotrichum species existed among the different isolates and the districts surveyed. However, to overcome the inadequacies of this traditional morphological identification, sequence analyses are needed to be carried out to confirm the identity of these Colletotrichum species isolates.
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Language: | eng |
Subjects: | H20 - Maladies des plantes, Mangifera indica, Colletotrichum, anthracnose, morphologie végétale, distribution géographique, analyse multivariée, http://aims.fao.org/aos/agrovoc/c_4575, http://aims.fao.org/aos/agrovoc/c_1761, http://aims.fao.org/aos/agrovoc/c_481, http://aims.fao.org/aos/agrovoc/c_13434, http://aims.fao.org/aos/agrovoc/c_5083, http://aims.fao.org/aos/agrovoc/c_28921, http://aims.fao.org/aos/agrovoc/c_4027, |
Online Access: | http://agritrop.cirad.fr/595994/ http://agritrop.cirad.fr/595994/1/Demb%C3%A9l%C3%A9%20et%20al%202020-AJFAND.pdf |
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dig-cirad-fr-5959942024-02-16T13:51:53Z http://agritrop.cirad.fr/595994/ http://agritrop.cirad.fr/595994/ Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire. Dembele Dio Dramane, Kamara A., Grechi Isabelle, Silué N., N'Goran N.S., Yéo Y.S., Rey Jean-Yves, Koné Daouda. 2020. African Journal of Food, Agriculture, Nutrition and Development, 20 (3) : 15837-15856.https://doi.org/10.18697/ajfand.91.18840 <https://doi.org/10.18697/ajfand.91.18840> Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire Dembele, Dio Dramane Kamara, A. Grechi, Isabelle Silué, N. N'Goran, N.S. Yéo, Y.S. Rey, Jean-Yves Koné, Daouda eng 2020 African Journal of Food, Agriculture, Nutrition and Development H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 Côte d'Ivoire http://aims.fao.org/aos/agrovoc/c_4027 Anthracnose caused by Colletotrichum species is the most important field and postharvest disease infecting mango worldwide. A survey was conducted in the seven mango producing districts in the north of Côte d'Ivoire to identify and characterize Colletotrichum species isolates associated with mango leaves necrosis and fruit rots. A total of 70 isolates were identified based on morphological and cultural characters. Most of isolate colour were grey or grey whitish (36%), cottony (71%) with cylindrical conidia (97%) rounded on both ends (57%). Three texture types were observed in colonies of the seventy isolates. Most of the isolates were cottony (71%) followed by abundant aspect (23%) and closely appressed (6%). According to conidia shape, two species of Colletotrichum; Colletotrichum gloeosporioides (97%) and C. acutatum(3%) were identified in the seventy isolates. Conidia length and width varied respectively from 15.4to 19.7μm and 4.8 to 5.2 μm. The Average Linear Growth Rate (ALGR) 7 days after culture varied from 0.76 to 0.91 cm day-1. Multivariate analysis grouped the 70 isolates into four morphotypes containing, respectively: 5 (7%), 7 (10%), 17 (24%) and 41 (59%) isolates. Isolates of morphotype 1 were characterized by whitish obverse and reverse colour with an abundant mycelia aerial aspect. The second morphotypes were represented by isolates with obverse and reverse brownish grey colour and contained both conidia with two rounded ends, and one rounded and one sharped ends. The third morphotype consisted of isolates with obverse and reverse grey whitish colour. The fourth morphotype consisted of isolates with obverse and reverse respectively dark grey and grey or vice versa. Conidial length and width of morphotypes varied, respectively, from 14.5 to 17.2 μm and 4.6 to 5.2 μm. ALGR of morphotypes varied from 0.84 to 0.87 μm day-1. The present study highlighted that morphological variation of Colletotrichum species existed among the different isolates and the districts surveyed. However, to overcome the inadequacies of this traditional morphological identification, sequence analyses are needed to be carried out to confirm the identity of these Colletotrichum species isolates. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/595994/1/Demb%C3%A9l%C3%A9%20et%20al%202020-AJFAND.pdf text cc_by_nc_nd info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/4.0/ https://doi.org/10.18697/ajfand.91.18840 10.18697/ajfand.91.18840 info:eu-repo/semantics/altIdentifier/doi/10.18697/ajfand.91.18840 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.18697/ajfand.91.18840 |
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H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 http://aims.fao.org/aos/agrovoc/c_4027 H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 http://aims.fao.org/aos/agrovoc/c_4027 |
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H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 http://aims.fao.org/aos/agrovoc/c_4027 H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 http://aims.fao.org/aos/agrovoc/c_4027 Dembele, Dio Dramane Kamara, A. Grechi, Isabelle Silué, N. N'Goran, N.S. Yéo, Y.S. Rey, Jean-Yves Koné, Daouda Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
description |
Anthracnose caused by Colletotrichum species is the most important field and postharvest disease infecting mango worldwide. A survey was conducted in the seven mango producing districts in the north of Côte d'Ivoire to identify and characterize Colletotrichum species isolates associated with mango leaves necrosis and fruit rots. A total of 70 isolates were identified based on morphological and cultural characters. Most of isolate colour were grey or grey whitish (36%), cottony (71%) with cylindrical conidia (97%) rounded on both ends (57%). Three texture types were observed in colonies of the seventy isolates. Most of the isolates were cottony (71%) followed by abundant aspect (23%) and closely appressed (6%). According to conidia shape, two species of Colletotrichum; Colletotrichum gloeosporioides (97%) and C. acutatum(3%) were identified in the seventy isolates. Conidia length and width varied respectively from 15.4to 19.7μm and 4.8 to 5.2 μm. The Average Linear Growth Rate (ALGR) 7 days after culture varied from 0.76 to 0.91 cm day-1. Multivariate analysis grouped the 70 isolates into four morphotypes containing, respectively: 5 (7%), 7 (10%), 17 (24%) and 41 (59%) isolates. Isolates of morphotype 1 were characterized by whitish obverse and reverse colour with an abundant mycelia aerial aspect. The second morphotypes were represented by isolates with obverse and reverse brownish grey colour and contained both conidia with two rounded ends, and one rounded and one sharped ends. The third morphotype consisted of isolates with obverse and reverse grey whitish colour. The fourth morphotype consisted of isolates with obverse and reverse respectively dark grey and grey or vice versa. Conidial length and width of morphotypes varied, respectively, from 14.5 to 17.2 μm and 4.6 to 5.2 μm. ALGR of morphotypes varied from 0.84 to 0.87 μm day-1. The present study highlighted that morphological variation of Colletotrichum species existed among the different isolates and the districts surveyed. However, to overcome the inadequacies of this traditional morphological identification, sequence analyses are needed to be carried out to confirm the identity of these Colletotrichum species isolates. |
format |
article |
topic_facet |
H20 - Maladies des plantes Mangifera indica Colletotrichum anthracnose morphologie végétale distribution géographique analyse multivariée http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_1761 http://aims.fao.org/aos/agrovoc/c_481 http://aims.fao.org/aos/agrovoc/c_13434 http://aims.fao.org/aos/agrovoc/c_5083 http://aims.fao.org/aos/agrovoc/c_28921 http://aims.fao.org/aos/agrovoc/c_4027 |
author |
Dembele, Dio Dramane Kamara, A. Grechi, Isabelle Silué, N. N'Goran, N.S. Yéo, Y.S. Rey, Jean-Yves Koné, Daouda |
author_facet |
Dembele, Dio Dramane Kamara, A. Grechi, Isabelle Silué, N. N'Goran, N.S. Yéo, Y.S. Rey, Jean-Yves Koné, Daouda |
author_sort |
Dembele, Dio Dramane |
title |
Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
title_short |
Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
title_full |
Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
title_fullStr |
Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
title_full_unstemmed |
Morphological characteristics and distribution of Colletotrichum isolates morphotypes infecting mango (Mangifera indica L.) in the north of Côte d'Ivoire |
title_sort |
morphological characteristics and distribution of colletotrichum isolates morphotypes infecting mango (mangifera indica l.) in the north of côte d'ivoire |
url |
http://agritrop.cirad.fr/595994/ http://agritrop.cirad.fr/595994/1/Demb%C3%A9l%C3%A9%20et%20al%202020-AJFAND.pdf |
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