著者

エストラーダベラスコ ベアトリス ルイスロサノ ファン マニュエル バレア ホセ ミゲル

出版者

日本菌学会

雑誌

日本菌学会大会講演要旨集

巻号頁・発行日

vol.53, pp.37, 2009

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Increased salinization of arable land is anticipated to raise devastating global effects in the coming years. Mediterranean countries already have both arable land salinization and desertification problems. Arbuscular mycorrhizal (AM) fungi have been shown to improve plant tolerance to abiotic environmental factors such as salinity. The AM fungi <I>Glomus coronatum</I>, which is a reperesentative species in salinity environments, and isolated from sand dunes in the Natural Park of Cabo de Gata (SE Spain) was used in our study. Two other AM fungi isolated from non-salinized environments; <I>G. intraradices</I> and <I>G. mosseae</I> were also used in the experiment. <I>Asteriscus maritimus</I> (L.), a member of the Asteracea family, was selected to carry out the greenhouse experiment to be native of lands surrounding the Mediterranean Sea, especially Spain. In this study, <I>A. maritimus</I> plants were grown in sand and soil mixture with two NaCl levels (0 and 50 mM) during 10 weeks of non-saline pre-treatment, following 2 weeks of saline treatment. Results showed that inoculated plants grew more than nonmycorrhizal plants. Unexpectedly <I>G. intraradices</I> was the most efficient AM fungi in terms of fresh weight, dry weight and Qyield although plants inoculated with <I>G. coronatum</I> showed better stomatic conductance. Plants inoculated with <I>G. mosseae</I> showed a intermediate pattern between the other two AM fungi. Based on these results, the AM fungi inoculation helps the growth of <I>A. maritimus</I> in saline conditions and <I>G. intraradices</I> appears to be the most efficient of the three AM fungi studied. This study may be useful in revegetation and regeneration projects by selecting adequate species of AM fungi.