Studies on Dynamic and Functional Aspects of Plant Ecochemicals

植物次生代谢物的动态和功能研究项目涵盖的研究领域非常广泛。项目实施三年来，共发表论文61篇，其中3篇已出版，2篇已投稿，出版专著2本，口头报告83篇。（1）核磁共振新技术的建立及其在生物活性天然产物结构鉴定中的应用，生物活性胺和钙的原位分析方法的发展（11篇论文）。(2)花卉、马铃薯花色素苷的结构解析与定量，以及高等植物中新的多酚类和萜类化合物（13篇）。(3)具有α-葡萄糖苷酶活性和抗氧化活性的植物次生代谢产物及其结构、构效关系和作用方式（5篇）。(4)植物防御剂：化感作用、杀虫拒食作用、抗菌物质等方面的研究（18篇论文，2部专著）。(5)植物一般防御物质类黄酮的生物合成、代谢及功能研究（6篇）。(6)植物与病原微生物、共生微生物和附生微生物相互作用的化学研究（3篇）通过大量的研究，我们对植物生态化学物质在以自养植物和异养生物为基础的生态系统中所起的多种生物作用的意义有了一定的认识。我们相信，对植物生态化学物质进行深入研究的必要性越来越大，以找到低投入的可持续农业，以及找到我们与地球上其他生物永远共存的新生活方式。

The research project focusing on dynamic and functional aspects of plant secondary metabolites covers very wide research areas. The results achieved in the project for three years have been reported as 61 reseach papers including 3 papers in press and 2 papers submitted, and 2 books, in addition to 83 oral presentations. Our reseach results are summarized as follows :(1) Establishment of new NMR techniques and application to structure elucidation of biologically active natural products, and development of in situ analytic methods of bioactive amines and calcium (11 papers).(2) Structure elucidation and quantification of anthocyanins in flowers and potatoes, and new polyphenols and terpenoids in higher plants (13 papers).(3) Plant secondary metabolites possessing alpha-glucosidase inhivitory and antioxidative activities, and their structure, structure-activity relationships and mode of action (5 papers).(4) Plant defense agents : allelopathic, insecticidal and antifeeding principles, and antimicrobial substances in the family Rosaceae (18 papers, 2 books).(5) Studies on biosynthesis, metabolism and functions of flavonoids as general defense substances in plants (6 papers).(6) Chemical studies on interactions between plant and pathogenic, symbiotic and epiphytic microorganisms (3 papers).Through such a lots of researches, we can now understand a little well about the significancy of plant ecochemicals taking many kinds of roles among living substances in the ecosystem based on autotrophic plants and heterotrophic organisms. It is our confidence that the necessity of further studies on plant ecochemicals is increasing more and more to find the way to low-input sustainable agriculture as well to find our new life style to coexist forever with other organisms on the earth.