INFLUENCE OF DEEP SEA WATER ON FUNCTIONAL CONSTITUENTS AND DISEASE TOLERANCE IN MYCORRHIZAL ASPARAGUS PLANTS
Recently, deep-sea-water is attempted to use in agriculture. We investigated the effect of deep-sea-water on functional constituents and tolerance to Fusarium proliferatum (Fp) in asparagus plants. Asparagus seedlings (Asparagus officinalis L. Welcome) were inoculated with two species of arbuscular mycorrhizal fungi [AMF, Glomus intraradices (Gi), Gigaspora margarita (GM)]. Four weeks after AMF inoculation, plants were treated with deep sea water (once/week) until end of the experiment. Twenty weeks after AMF inoculation, plants were inoculated with Fp. In this study, we investigated; dry weight, free sugar content (sucrose, glucose and fructose), antioxidative substances (polyphenol and ascorbic acid contents) before and after inoculation of Fp. Dry weight of shoots and roots were increased in deep sea water-added asparagus plants with or without presence of AMF, though higher dry weight was observed in deep sea water with AMF-inoculated plots. After Fp inoculation, sucrose, glucose and fructose were raised in every plot. On the other hand, antioxidative substances (polyphenol and ascorbic acid contents) were not changed. As for disease tolerance, disease incidence and severity of symptoms were eased by deep sea water treatment. In addition, disease incidence and severity of symptoms was also less in deep sea water with presence of AMF. Based on our results, it was suggested that growth and functional constituents promotion effect in asparagus plants as well as tolerance to the Fusarium disease was increased by deep sea water.
Okada, T., Yokoyama, M. and Matsubara, Y. (2012). INFLUENCE OF DEEP SEA WATER ON FUNCTIONAL CONSTITUENTS AND DISEASE TOLERANCE IN MYCORRHIZAL ASPARAGUS PLANTS. Acta Hortic. 936, 181-188
Fusarium disease, arbuscular mycorrhizal fungi, polyphenol, ascorbic acid, free sugar