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    Effects of ectomycorrhizal and vesculararbuscular mycorrhizal fungi on drought tolerance of four leguminous woody seedlings

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    Date
    1991
    Author
    Osonubi, O.
    Mulongoy, K.
    Awotoye, O.O.
    Atayese, M.O.
    Okali, D.U.U.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Seedlings of Acacia auriculiformis A. Cunn. ex. Benth., Albizia lebbeck (L.) Benth., Gliricidia sepium (Jac.) Walp and Leucaena leucocephala (Lam.) de Wit. were inoculated with an ectomycorrhizal (Boletus suillus (L. ex. Fr.) or indigenous vesicular-arbuscular mycorrhizal (VAM) fungi in a low P soil. The plants were subjected to unstressed (well-watered) and drought-stressed (water-stressed) conditions. In Gliricidia and Leucaena , both mycorrhizal inoculations stimulated greater plant growth, P and N uptake compared to their non-mycorrhizal (NM) plants under both watering regimes. However, in Acacia and Albizia , these parameters were only stimulated by either ectomycorrhiza (Acacia) or VA mycorrhiza (Albizia). Growth reduction occurred as a result of inoculation with the other type of mycorrhiza. This was attributed to competition for carbon between Acacia and VA mycorrhizas and parasitic association between Albizia and ectomycorrhiza. Drought-stressed mycorrhizal and NM Leucaena , and drought-stressed mycorrhizal Acacia tolerated lower xylem pressure potentials and larger water losses than the drought-stressed mycorrhizal and NM Albizia and Gliricidia . These latter plants avoided drought by maintaining higher xylem pressure potentials and leaf relative water content (RWC). All the four leguminous plants were mycorrhizal dependent. The higher the mycorrhizal dependency (MD), the lower the drought tolerance expressed in terms of drought response index (DRI). The DRI may be a useful determinant of MD, as they are inversely related.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5916
    IITA Subjects
    Plant Health
    Agrovoc Terms
    Seedlings; Gliricidia Sepium; Fungi; Leucaena Leucocephala; Drought; Drought Tolerance; Drought Resistance
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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