Sửa đổi Phytochemical vị: một mô hình côn trùng Cuộc sống thực vật trong các hình thức khác nhau của nó được công nhận là nguồn dồi dào, sẵn có nhất của hóa chất mới hoặc khách hàng tiềm năng cho các hóa chất tổng hợp để đáp ứng nhu cầu ngày càng tăng của ngành nông nghiệp và dược phẩm. Các mảng của các hóa chất được sản xuất bởi các nhà máy là rất lớn, nhưng số lượng các hợp chất được biết đến chỉ chiếm một phần nhỏ của tổng số. Hơn nữa, sự đa dạng của các. | 19__ Phytochemical Modification of Taste An Insect Model J. Alan A. Renwick CONTENTS Introduction Repellents Antifeedants and Toxins Cabbage Butterfly Pieris rapae Diet-Dependent Sensitivity Conclusions References Introduction Plant life in its various forms is widely recognized as the most readily available abundant source of new chemicals or leads for synthetic chemicals to meet the growing needs of the agricultural and pharmaceutical industries. The array of chemicals produced by plants is enormous but the number of known compounds represents only a fraction of the total. Furthermore the diversity of biological activities exhibited by different groups of compounds continues to offer countless opportunities for practical applications. While we have become more aware of this chemical treasure and we increasingly exploit the unique properties of individual phytochemicals especially as pharmaceuticals the adaptive significance of these natural chemicals in the evolution of plants tends to be either ignored or forgotten. Although some controversy exists over the relative importance of pathogens and herbivores in the evolution of secondary metabolite production by plants it is clear that the selective pressure exerted by invading organisms has played a major Most chemicals that we now value for their biological activity are therefore likely to be products of the evolution of chemical defenses against such attacks. The properties that cause a specific phytochemical to deter oviposition by an insect pest to function as an antibiotic or to exhibit anticancer activity may be considered as side benefits of this evolutionary process of self-protection. Compounds that defend a plant against invertebrates or vertebrates may now be used to protect crop plants in an agricultural setting. Other compounds that are highly toxic to vertebrates have proved to have valuable pharmacological properties and .
