アーバスキュラー菌根菌が水および塩類ストレス，並びに湛水条件下における <i>Sclerocarya birrea</i> の樹勢および養分吸収に及ぼす影響

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  • Effect of Arbuscular Mycorrhizal Fungi on Tree Growth and Nutrient Uptake of Sclerocarya birrea under Water Stress, Salt Stress and Flooding

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A greenhouse experiment was conducted to determine the influence of arbuscular mycorrhizal (AM) fungus inoculation on water stress, salt stress and flooding tolerance of three subspecies of Scleocarya birrea (A. Rich.) Hochst. Gigaspora margarita Baker and Hall was used for the inoculation. All the three subspecies of S. birrea had high tolerance both to water stress and flooding even without G. margarita inoculation. All flooded seedlings developed lenticels and survived three months of flooding. Non-mycorrhizal seedlings of S. birrea subsp. multifoliolata survived even under electric conductivity of up to 7.1 dS·m−1. Root colonization by G. margarita markedly improved tolerance of S. birrea seedlings to water stress, salt stress and flooding. In particular, S. birrea subsp. caffra under water stress and flooding conditions showed the highest response to inoculation. Mycorrhizal S. birrea subsp. multifoliolata recorded enhanced uptake of N, P, Ca and Mg at 7.1 dS·m−1. These results demonstrate that even though S. birrea has natural tolerance to water stress, salt stress and flooding, AM fungus is very effective in strengthening the tolerance of S. birrea grown in arid and semi arid areas.<br>

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  • 園芸学会雑誌

    園芸学会雑誌 75 (1), 26-31, 2006

    一般社団法人　園芸学会

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