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Root morphology and development of banana and plantain root systems in relation to nematode population

Published online by Cambridge University Press:  10 January 2006

Roger Fogain  and
R. Simon Gowen
Roger Fogain
Affiliation:
Centre Africain de Recherches sur Bananiers et Plantains (CARBAP), BP 832 Douala, Cameroon
R. Simon Gowen
Affiliation:
Department of Agriculture, University of Reading, Earley Gate, PO Box 236, Reading Berks, UK
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Abstract

Introduction. Nematodes are significant pests of bananas and plantains worldwide. Different levels of susceptibility to these pests have been reported. Studies were carried out to investigate differences in root systems and development of Musa clones with different levels of susceptibility and their possible role in the host-parasite relationship. Materials and methods. Five Musa clones, of which four were susceptible and one resistant to the nematode Radopholus similis, were grown in a plot naturally infested by this nematode. Root samples were collected 6 months after planting and measurements were made on the significance of tissue areas in root cross-sections, and the significance of root mass, root development and nematode populations with depth. Results. No significant difference was observed between cultivars in their general structural organisation or the relative significance of the tissue component of the root cross-section. A significantly lower number of air lacunae was found in the resistant accession in comparison with the susceptible ones. All the accessions except Christine (ABB) were comparable in their root development in the soil profile with more than 70% of the total root mass produced above 40 cm. The greatest nematode population and damage on roots were found at depths between (20 and 40) cm. Conclusions. This is the first report on differences in air spaces between Musa cultivars, and their role in the Musa-nematode relationship needs further investigation.

Keywords

MusaCameroonplant nematodeshost resistance to pestsrootsplant morphologygrowthMusaCamerounnématode des plantesrésistance de l'hôte aux ravageursracinemorphologie végétalecroissance
Type
Research Article
Information
Fruits , Volume 60 , Issue 5 , September 2005 , pp. 297 - 302
Copyright
© CIRAD, EDP Sciences, 2005

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