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題 名 | 植物寄生性線蟲之演變=The Development of Plant-Parasitic Nematodes |
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作 者 | 蔡東纂; | 書刊名 | 植物病理學會刊 |
卷 期 | 7:1 1998.03[民87.03] |
頁 次 | 頁1-9 |
分類號 | 373.9 |
關鍵詞 | 植物寄生性線蟲; 演化; 變異; Plant-parasitic nematode; Evolution; Variation; |
語 文 | 中文(Chinese) |
中文摘要 | 自六億年前寒武紀時期即存在的線蟲,經漫長歲月演變後棲身於海水、淡水、土 壤及動植物等環境中。 由寄生習性及寄主種類判斷,最早的植物寄生性線蟲為 Tylenchida ,而 Dorylaimida 之演化應在雙子葉被子植物出現之後。 包括 Aphelenchida 之植物寄生 性線蟲在攝食及生殖兩方面之器官及方式上皆有長足的演化,且與寄主植物間達到共同演化 程度。 種間遺傳變異產生的生理小種有 race、 pathotype 及 biotype 等不同名詞, 如 Globodera pallida、 G. rostochiensis 及 Heterodera avenae 分別有 6、 4 及 8 個 pathotype; Ditylenchus dipsaci、 H. glycines 及 Meloidogyne incognita 分別有 20、 16 及 4 個 race; Tylenchulus semipenetrans、 Bursaphelenchus xylophilus 及 Radopholus similis 分別有 4、2 及多個 biotype。 |
英文摘要 | From the fossil record of the Cambrian, we can assume that nematodes evolved at least 600 × 10 �� years ago. The diversity of parasitic habit and the wide host range suggest that the first appearance of plant parasitism among Nematoda was in the Tylenchida. According the reported hosts on the Filicineae, Gymnospermae, and Cycadofilicales, Tylenchida is almost as old as the origin of higher terrestrial plants, while Dorylaimida did not evolve before the appearance of dicotylendonous angiosperms. A large number of Tylenchida, Aphelenchida and Dorylaimida show a close adaptive morphological and physiological association with plant hosts, from commensalism to highly evolved parasitism. For recognizing infraspecific variation between species or sibling species, the terms race, biotype, pathotype and strain would be applied to those nematode population respectively. Adaptation to resistant varieties, ecological and temporal isolation would lead a nematode race to be a new species. More commonly pathotype has been used to refer to populations with differing pathogenic capabilities, Globodera pallida has 6, G. rostochiensis has 4 and Heterodera avenae has 8 pathotypes. Nematode races are separated by cultivars or lines whereas Ditylenchus dipsaci has over 20, H. glycines has 16 and Meloidogyne incognita has 4 races. Based on the relative parasitism of host range, Tylenchulus semipenetrans has 4, Bursaphelenchus xylophilus has 2 and Radopholus similis has several biotypes. |
本系統中英文摘要資訊取自各篇刊載內容。