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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2014 , Volume 2, Issue 4
Page No. : 1-9
Article doi: : http://dx.doi.org/10.18782

Pathogenicity of four Fungal Species on Fruits and Leaves of the Olive Tree (Olea Europaea L.)

Mohamed Chliyeh¹, El Hassan Achbani², Youssef Rhimini¹, Karima Selmaoui¹, Amina Ouazzani Touhami¹, Abdelkarim Filali Maltouf³, Cherkaoui El Modafar⁴, Abdelmajid Moukhli⁵, Ahmed Oukabli⁶, Rachid Benkirane¹, and Allal Douira^1*

¹Laboratoire de Botanique et de Protection des Plantes, UFR de Mycologie, Département de Biologie, Faculté des sciences BP, 133,Université Ibn Tofail, Kenitra, Maroc
²Centre Régional de la Recherche Agronomique, Unité de Recherche en Protection des Plantes, Laboratoire de Phytobactériologie et de lutte biologique, Km 11, route Hadj Kaddour, 50100, Meknès, Morocco
³Laboratoire de Microbiologie et Biologie Moléculaire, Faculté des Sciences, Université Mohammed V Agdal, Av Ibn Batouta, BP 1014 Rabat, Maroc
⁴Laboratoire de Biotechnologie, Valorisation et Protection des Agroressources, Faculté des sciences et techniques Guéliz, B.P. 618, 40 000 Marrakech, Maroc; 4 UR, Amélioration génétique des plantes,
⁵Institut national de la Recherche agronomique F- 40 000 Marrakech, Maroc
⁶Institut national de la Recherche agronomique, Amélioration des plantes et Conservation des ressources phytogénétiques CRRA, BP 578, Meknès, Maroc
*Corresponding Author E-mail: douiraallal@hotmail.com

ABSTRACT

Pathogenicity of Alternaria alternata, Aspergillus flavus, Cladosporium sp. and Colletotrichum
gloeosporioides isolated from olive fruits was studied by inoculating olive fruits and leaves. Three
techniques were used to inoculate the fruits (mycelial plug on the intact and the injured olives and by
injecting them with the spore’s suspension) and two techniques for the leaves (mycelial plug on the intact
and the injured olive leaves). Alternaria alternata had no pathogenic effect neither on leaves nor on the
olives. Also, Aspergillus flavus was not able to colonize or to provoke any symptoms on the intact fruits,
this fungus provoke green mold when the epicarp was artificially injured with a colonization percentage
of 40 % and forms the conidiophores producing conidia on the olive fruit, the depth of this mold was 0.4
cm affecting all the fruit tissues. Cladosporium sp. has shown a brown rot on the olive fruit and the
colonization percentages of this fungus on the olives were 65, 70 and 60% using respectively the
techniques 1, 2 and 3 of inoculation. Colletotrichum gloeosporioides was able to affect the olives and to
show a rot on them. Ten days after inoculation of the intact and the injured leaves, the estimated disease
severity caused by Colletotrichum gloeosporioides on leaves of Dahbia and Haouzia olive tree was 100
%. The possibility of decreasing the olive oil quality because of these fungal species was discussed in this
study.
Keywords: Olive tree, Aspergillus flavus, Alternaria alternata, Colletotrichum gloeosporioides.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article:

Int. J. Pure App. Biosci. 2 (4): 1-9 (2014)

No. 772, Basant Vihar, Kota

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