Improved Acacia senegal growth after inoculation with arbuscular mycorrhizal fungi under water deficiency conditions
2011
Ndiaye, M. (Universite Cheikh Anta Diop, Dakar-Fann (Senegal). Dept. de Biologie Vegetale) | Cavalli, E. (Universite de Franche-Comte, Besancon Cedex (France). UFR Sciences et Techniques) | Manga, A.G.B. (Universite Cheikh Anta Diop, Dakar-Fann (Senegal). Dept. de Biologie Vegetale) | Diop, T.A.
In a controlled pot experiment, tropical legume tree Acacia senegal L. (Wild.) seedlings were inoculated with three different species of arbuscular mycorrhizal fungi (AMF), Glomus intraradices, G. fasciculatum and G. mosseae. Three water levels (field capacity, moderate water deficiency & severe water deficiency) were applied to the plants after transplantation. Each treatment was replicated 5 times. After twelve weeks of water deficiency, results showed that growth of plants was improved by mycorrhizal inoculation under water deficiency conditions. Inoculation treatments under water deficiency significantly increased biomass, height and shoot water content. In non-inoculated plants, water deficiency reduced most plant growth parameters. Root colonization average varied from 30.4% to 62.5%. Lowest intensity (30.4%) was observed for field capacity associated with G. intraradices and the highest root colonization (62.5%) was observed for sev ere water-deficiency associated with G. fasciculatum. AM fungus G. fasciculatum can form adequate mycorrhizae with A. senegal under water deficiency conditions.
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