title: Effects of Applied Nitrogen Amounts on the Functional Components of Mulberry (Morus alba L.) Leaves.
abstract: This study investigated the effects of applied nitrogen amounts on specific functional components in mulberry (Morus alba L.) leaves. The relationships between mineral elements and the functional components in mulberry leaves were examined using mulberry trees cultivated in different soil conditions in four cultured fields. Then, the relationships between the nitrogen levels and the leaf functional components were studied by culturing mulberry in plastic pots and experimental fields. In the common cultured fields, total nitrogen was negatively correlated with the chlorogenic acid content (R(2) = -0.48) and positively correlated with the 1-deoxynojirimycin content (R(2) = 0.60). Additionally, differences in nitrogen fertilizer application levels affected each functional component in mulberry leaves. For instance, with increased nitrogen levels, the chlorogenic acid and flavonol contents significantly decreased, but the 1-deoxynojirimycin content significantly increased. Selection of the optimal nitrogen application level is necessary to obtain the desired functional components from mulberry leaves.
authors: Resource and Environment Research Division, Shimane Agricultural Technology Center , 2440 Ashiwata-cho, Izumo, Shimane 693-0035, Japan.
authors: Mari
authors: M
authors: Sugiyama
authors: Resource and Environment Research Division, Shimane Agricultural Technology Center , 2440 Ashiwata-cho, Izumo, Shimane 693-0035, Japan.|Department of Agriculture, Forestry, and Fishery, Shimane Prefectural Government , 1 Tonomachi, Matsue, Shimane 690-8501, Japan.
authors: Makoto
authors: M
authors: Takahashi
authors: Department of Biological Applications, Shimane Institute for Industrial Technology , 1 Hokuryo-cho, Matsue, Shimane 690-0816, Japan.
authors: Takuya
authors: T
authors: Katsube
authors: National Institute of Agrobiological Sciences , 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.|Urasoe Silver Human Resources Center , 1-7-2 Inanse, Urasoe, Okinawa 901-2128, Japan.
authors: Akio
authors: A
authors: Koyama
authors: Faculty of Life and Environmental Science, Shimane University , 1060 Nishikawatsu-cho, Matsue, Shimane 690-8504, Japan.
authors: Hiroyuki
authors: H
authors: Itamura
mesh_terms: D017485:1-Deoxynojirimycin / Q000032:analysis / Q000378:metabolism; D002726:Chlorogenic Acid / Q000378:metabolism; D005308:Fertilizers / Q000032:analysis; D031625:Morus / Q000737:chemistry* / Q000378:metabolism; D009584:Nitrogen / Q000032:analysis* / Q000378:metabolism; D010936:Plant Extracts / Q000032:analysis* / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000737:chemistry
chemical_list: D005308:Fertilizers; D010936:Plant Extracts; D012987:Soil; D017485:1-Deoxynojirimycin; D002726:Chlorogenic Acid; D009584:Nitrogen
keywords: 1-deoxynojirimycin; chlorogenic acid; flavonol; functional component; mulberry leaf; nitrogen application