THE FIRST REPORT OF A PUTATIVE "ENTOMOPARASITIC ADULT FORM" IN BURSAPHELENCHUS
THE FIRST REPORT OF A PUTATIVE "ENTOMOPARASITIC ADULT FORM" IN BURSAPHELENCHUS
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DOI：
10.1645/ge-1633.1
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发表时间：
2009-02-01
影响因子：
1.3
通讯作者：
Center, Barbara J.
中科院分区：
文献类型：
--
作者：
Kanzaki, Natsumi;Maehara, Noritoshi;Center, Barbara J.
在其传播媒介昆虫-它与食菌期的初级和次级生殖特征相同，但与JIV dauer幼鱼具有退化的消化道。此外，“寄生形式”具有相对于与双环六甲藻类似的食菌相的特化特征，例如，前端有空泡样的点（假设是感觉器官），一个很长的外阴瓣，圆锥形的雌性尾巴和细长的雄性骨针。在几种伞滑刃属物种中已经报道了昆虫寄生幼虫的存在，但这是第一次证实该属中假定的“昆虫寄生成虫形式”的报道。因此，B的“寄生成虫形式”。luxuriosae被认为是本属中本种的自形特征。寄生对寄主甲虫的生理影响被认为是弱的，因为在被感染的甲虫中没有观察到明显的症状。此外，在甲虫宿主中没有观察到线虫卵或繁殖幼虫，这表明需要更多的研究来确认这种关联的性质（寄生虫与内泳虫）。
A putative "entomoparasitic adult form" of Bursaphelenchus luxuriosae was found in the tracheal system and body cavity of its cerambycid vector beetle, Acalolepta luxuriosa, Morphologically, this form is intermediate between the usual mycophagous adult and the phoretic dauer juvenile, i.e., it shares the primary and secondary reproductive features with the mycophagous phase but shares a degenerate digestive tract with JIV dauer juveniles. In addition, the "parasitic form" has specialized characters relative to the mycophagous phase analogous to dicyclic Hexatylina, e.g., vacuole-like dots (assumed to be sensory organs) at the anterior end, a very long vulval flap, conical female tail, and elongated male spicules. The presence of insect-parasitic juveniles has been reported in several Bursaphelenchus species, but this is the first confirmed report of a putative "entomoparasitic adult form" in the genus. Thus, the "parasitic adult form" of B. luxuriosae is hypothesized to be an autapomorphic character of this species in the genus. The physiological impact of the parasitism on the host beetle is assumed to be weak because no clear symptoms were observed in the infested beetles. Also, no nematode eggs or propagative juveniles were observed in the beetle host, suggesting that more research is needed to confirm the nature of the association (parasitic vs. endophoretic).