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이춘우,竹內安智 한국국제농업개발학회 1998 韓國國際農業開發學會誌 Vol.10 No.4
農水産物 自給率은 매년 減少하고 있으며, 수입은 증가하고 있다. 농지 및 농업인구의 감소로 農業基盤이 弱化되고 있다. 葉表面wax, 寄生雜草, 生物農藥, allelopathy 등을 연구하고 있으며, 遺傳子操作作物은 8個 作物에서 수행되고 있다. 67개의 화합물질이 環境호르몬작용을 하거나 可能性이 있는 것으로 밝혀졌고, 除草劑, 殺菌제, 殺蟲劑 등 농업과 관련된 화합물은 43種이다. 그리고 麥類政策 改正이 推進되고 있다. The self supplying ratio of agricultural products is decreasing markedly every year. Whereas imports of agricultural products are increasing. Considering that the cultivated area, and the farm population is decreasing, the infra structure of agriculture nowadays is weakening as comparable to that of 30 years ago. The epicuticular waxs of several weeds, the parasitic angiosperms, the bioagrochemcals, and the allelopathy are studying. 43 chemicals among 67 endocrine disrupting chemicals are agricultural chemicals such as herbicides, fungicides, and pesticides. Transformation study is underway in 8 crops. The renovation of the policy of wheat and barley is underway.
Allelopathic Effect of Oryzalexine A on the Germination and Growth of Several Weeds
Choon-Woo Lee,Koichi Yoneyama,Yasutomo Takeuchi,Young-Koo Son 韓國作物學會 2002 Korean journal of crop science Vol.47 No.4
Oryzalexine A, a potent growth inhibitor against several weeds such as Digitaria sanguinalis (L) Scop., and Amaranthus lividus L. was purified by conventional solvent partitioning and column chromatographies. This substance showed strong inhibitory activity on several weeds: Germination of seeds of Poa annua L. was inhibited by 36.5 % at 1.0 mM and Amaranthus lividus L. by 56.1% at 2.5mM. Growth of root and shoot of Digitaria sanguinalis (L.) Scop. by 10.2% and 22.4% at 2.5mM, respectively. These suggest that Oryzalexine A in rice straw might affect the germination and growth of susceptible weeds and other plants.
Quantification of Momilactones A and B in Rice Straw
Choon-Woo Lee,Koichi Yoneyama,Yasutomo Takeuchi,Su Noh Ryu 韓國作物學會 2002 Korean journal of crop science Vol.47 No.4
Momilactones A and B, the major phytotoxins and phytoalexins in rice plants, were quantified by a HPLC-APCI-MS-MS (APCI-MS-MS) system under multiple reaction monitoring conditions. Since MA and MB were found to be easily extracted with water, these phytotoxic compounds may affect germination and growth of other plant species when the rice straws were left in the fields.