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| 題 名 | Nematode-Vector Beetle Relation and the Regulatory Mechanism of Vector's Life History in Pine Wilt Disease=松樹萎凋病線蟲及其病媒甲蟲關係和病媒生活史的調節機制 |
|---|---|
| 作 者 | 富樫一巳; | 書刊名 | 臺灣昆蟲 |
| 卷 期 | 33:3/4 2014.02[民103.02] |
| 頁 次 | 頁189-205 |
| 分類號 | 436.34 |
| 關鍵詞 | 松材線蟲; 生活史; 松斑天牛; 線蟲及病媒關係; 松樹萎凋病; Bursaphelenchus xylophilus; Life history; Monochamus alternatus; Nematode-vector relation; Pine wilt disease; |
| 語 文 | 英文(English) |
| 中文摘要 | 長角天牛屬(Monochamus)的甲蟲會傳播松材線蟲(Bursaphelenchus xylophilus),感受性的松樹感染線蟲之後得到松樹萎凋病而死亡,長角天牛則將卵產在線蟲致死的松樹上。在松林中病株呈集中分佈狀 (clumped distribution),這個現象可解釋為由其攜帶的線蟲數量所影響的天牛的致病能力及繁殖能力的負相關性,及性成熟的天牛對病株的反應。松材線蟲可在其媒介天牛間水平傳播,有時可以進入天牛雌蟲的受精囊(spermathecae)中。因有各式的傳播途徑,線蟲族群可以持續存在於天牛族群中。另一方面,因滯育的誘發、避開和終止時期的不同,松斑天牛(M. alternatus)的二個亞種各有二種不同的幼蟲發育時間長度。幼蟲發育期的不同導致天牛族群可以持續存在於松林中。這些線蟲和天牛的特性被認為是對短暫且不可預期的資源所產生的進化反應。 |
| 英文摘要 | Cerambycid beetles of the genus Monochamus transmit the pinewood nematode, Bursaphelenchus xylophilus. Nematode-infected trees of susceptible pine species succumb to pine wilt disease. Monochamus beetles oviposit in nematode-killed trees. A clumped distribution of diseased trees in a pine stand can be explained by a negative relation between the ability of a beetle to kill a pine tree and its reproduction rate through the number of nematodes carried, and response of sexually mature beetles to diseased trees. Bursaphelenchus xylophilus exhibits horizontal transmission between vector beetles and sometimes enter the spermathecae of female beetles. The various transmission pathways lead to the persistence of nematode populations within beetle populations. On the other hand, there are two different lengths of larval development time in each of the two M. alternatus subspecies due to diapause induction, aversion, and termination. The difference in larval period leads to the persistence of beetle population in a pine forest. Such traits of nematodes and beetles are considered to be evolved responses to ephemeral and unpredictable resources. |
本系統中英文摘要資訊取自各篇刊載內容。