This experiment was conducted to evaluate tolerance of mycorrhizal or unmycorrhizal T. vogelii and V. subterranea subjected to drought stress at early growth phase, in a randomized blocks design; on sterilized substrate; with a mixture of selected fungi (AMF): Gigaspora margarita, Glomus hoi, Glomus intraradices and Scutellospora gregaria. Levels of drought stress were 90, 60, 30 and 15% of field capacity (FC) for control, mild, average and severe stress respectively with or without inoculation. Results indicated that mycorhization performed positive effect with r = 0.484 ** and r = 0.690 ** for T. vogelii and V. subterranea respectively on improvement of plants biomass of T. vogelii and V. subterranea. This increment was 3 % significant for T. vogelii at 90% of FC; 40, 22, 26 and 21 % for V. subterranea, for: 90, 60, 30 and 15% of FC respectively. Beside, results proved that mycorhization impaired the adverse effects of drought on growth at an early growth phase as compared to nonmycorrhizal plants. Inoculum used would be a useful, practical and effective material, for sustainable production of leguminous plants, especially herbaceous (V. subterranea) when water is scare or rainfall weak.
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