首页> 外文OA文献 >The Induction of Gall Formation in Ageratina riparia by Procecidochares alani (Diptera: Tephritidae). I. Gall Histology and Internal Gross Morphology of the Third Instar
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The Induction of Gall Formation in Ageratina riparia by Procecidochares alani (Diptera: Tephritidae). I. Gall Histology and Internal Gross Morphology of the Third Instar

机译:中华鳖(ageratina riparia)对瘿螨形成的影响(双翅目:实蝇科(Tephritidae))。 I.第三个实验室的胆汁组织学和内部总体形态学

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摘要

Gall formation in the composite, Ageratina riparia, is induced by the presence and activity of the larval stages of the gall-forming tephritid, Procecidochares alani (Steyskal). The tephritid spends its entire larval stage in the subapical area of the stem and its activity causes the formation of a bulbous shaped gall. Histological examination of the gall reveals an abundance of secretory ducts external and sometimes internal to the vascular cylinder; doubled vascular bundles; "faisceaux d'irrigation"; an increase in phloem and pith parenchyma accompanied by a decrease in xylem; nutritive cells; and an increase in stem diameter due to hyperplasia of the pith area. Morphologically, P. alani third instars possess structures generally characteristic of other cyclorrhaphous dipteran larvae. However, a yellowish membranous structure was found attached to the distal part of the most anterior pair of Malpighian tubules which appears to be unique to gall flies in the genus Procecidochares. This pair of structures, termed "yellow bodies," increases in size with each succeeding instar, decreases in size during pupariation, and is absent 2 to 3 days into the pupal stage. The proposed function of this structure is discussed.
机译:复合物中的胆囊形成,即鼠李(Ageratina riparia),是由形成胆汁的特立普特蚊(Procecidochares alani,Steyskal)幼虫阶段的存在和活性诱导的。替弗利特花的整个幼虫阶段都在茎的近尖部区域,其活动导致球根状胆囊的形成。胆囊的组织学检查显示,在气缸外部有分泌管,有时在内部有分泌管。血管束加倍; “灌溉灌溉”;韧皮部和髓粗薄组织的增加,木质部的减少;营养细胞;并且由于髓区的增生而导致茎直径增加。从形态上讲,P。alani第三龄幼虫具有一般具有其他环痔双足幼虫特征的结构。但是,发现最偏向的马尔皮基小管对的远端部分附着有淡黄色的膜状结构,这似乎是Procecidochares属中的蝇类所独有的。这对被称为“黄色小体”的结构,在每一个后继的幼虫中都会增加大小,在产卵期会减小大小,并且在up期的2至3天内会消失。讨论了此结构的建议功能。

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