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Poster De Conférence Année : 2014

Plant parasitic nematodes communities associated with olive trees in Morocco

Résumé

Plant-parasitic nematodes significantly contribute to economic losses in the ten top olive producing countries in the world, especially in the Mediterranean basin (Spain, Italy, Greece, Tunisia, and Morocco).Diversity and structures of plant-parasitic nematode communities respond to evolutionary, environmental and anthropogenic forces. Instead of controlling the main pathogenic nematode species as usual, one of the innovative strategies to control plant-parasitic nematodes would be to manage diversity in communities in order to lead them to be less pathogenic. The present study aims at understanding the contribution of olive domestication and human impacts on the plantparasitic nematode communities by analyzing the diversity of plant-parasitic nematodes in cultivated olive compared to wild olive in Morocco. Thus, 220 samples were collected in 2012 in several sites with cultivated and feral olive trees (i.e. wild olive resulting from cultivated olive) in the olive production areas located all along the Atlas foothills, as well as on wild olive Morphobiometric observations revealed a significant diversity of plant-parasitic nematodes, belonging to 12 families and 28 genera. Our results showed the presence of genera Pratylenchus and Meloidogyne in all sampled systems that are known harmful taxa for agriculture especially in nurseries. These two genera were more abundant in the cropped systems. Principal component analysis revealed no significant effect of olive systems on the diversity of PPN in communities but on the PPN community patterns Other factors such as olive genotype, soil physic-chemical characteristics, geo-climatic characteristics, associated plants with olive trees will also be discussed as major factors affecting the plant-parasitic nematode community patterns.
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Dates et versions

hal-01269353 , version 1 (05-02-2016)

Identifiants

  • HAL Id : hal-01269353 , version 1
  • PRODINRA : 332016
  • WOS : 000346299700019

Citer

Nadine Ali, Elodie Chapuis, Johannes Tavoillot, M. Ait Hamza, A. El Mousadik, et al.. Plant parasitic nematodes communities associated with olive trees in Morocco. 6. International Congress of Nematology, May 2014, Cape Town, South Africa. SOC NEMATOLOGISTS, Journal of Nematology, 46 (2), pp.1, 2014, Journal of Nematology. ⟨hal-01269353⟩
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