Volume 12, Numéro 2, Pages 3095-3100

Arbuscular Mycorrhizal Association In Tomato In Eight Microagrosystems, Northeastern Algeria

Authors : Ziane Hana . Ksentini Hana . Meddad-hamza Amel .


Description of the subject : Arbuscular mycorrhizal fungi (AMF) are telluric microorganisms which mediate interactions between plants and allow them to exploit the resources of the soil and a better tolerance to biotic and abiotic stress ; thus, they are fundamental to plant growth and development. However, in agricultural systems, the local AMF communities can be altered by conventionnal practices, and in the long term, their maintenance in agricultural soils can be compromised. Objective : The aim of this study was to prospect the mycorhizal status of tomato crop in conventionnally managed agrosystems through the assessment of AMF root colonization levels and sporal density in soil. Methodes : For this, eight agricultural soils in the northeast region of Algeria were chosen for estimating AMF root colonization parameters such as frequency (F%) and intensities of colonization (m% and M%) ; spores were isolated and quantified in 100 g of soil. Results : The results showed that AMF colonization was established in tomato roots in all the studied sites with F% averaging 95.67% ; however, m% and M% were low to medium and ranged from 10.74% to 49.25%. Spore density was relatively low and ranged from 57 to 201 per 100 g of soil. Conclusion : The results put forward the hypothesis that conventional management of soils in this region affects negatively the indigenous AMF population associated with tomato crop. This effect on probably hindering the expression of their beneficial effect, these sites might require exogenous AMF inputs as biofertilizers and biofortifiers for a more eco friendly agriculture.


agrosystems ; Mycorrhizae ; Root colonization ; Solanum lycopersicum (L.) ; Northeast Algeria