Galling insects manipulate host plant tissues for their own benefit. Because of feeding activity of the gall insects, both structural and metabolic changes occur in the host plant, leading to the formation of an abnormal growth of new organ (the gall). Galls induced by Palaeomystella oligophaga (Lepidoptera) on Macairea radula (Melastomataceae) depend on the constant larval feeding stimulus for establishment and development. The gall consists of two tissue compartments – the storage and nutritive tissues. These two gall tissues were investigated here in terms of the levels of oxidative stress and of a possible differential chemical investment. In addition, we investigated the relationship between gall coloration and the concentration of primary metabolites. Our results supported a differential investment of chemical compounds in the M. radula compartments, with higher concentrations of polysaccharides, malondialdehyde, and phenolic compounds in the storage tissue, and higher total soluble sugar concentrations in the nutritive tissue. Regarding gall colour, conflicting results were observed in the present gall system. Water-soluble polysaccharides were detected at higher concentrations in red galls than in green galls. As a water-soluble polysaccharide, pectin seems to be related to increased anthocyanin stability, a process that might occur in galls, leading to red coloration.

ing虫为自身利益操纵宿主植物组织。由于the虫的摄食活动，寄主植物会同时发生结构和代谢变化，从而导致新器官（the）异常生长。寡头古e（鳞翅目）对Macairea radula诱导的胆汁（Melastomataceae）依赖不断的幼虫进食刺激来建立和发育。胆汁由两个组织隔室组成–储存和营养性组织。这里根据氧化应激水平和可能的化学差异投资对这两个胆囊组织进行了研究。此外，我们研究了胆色与主要代谢产物浓度之间的关系。我们的研究结果支持了在麦得拉德罗非鱼中化学化合物的不同投资储藏组织中的多糖，丙二醛和酚类化合物的浓度较高，而营养组织中的总可溶性糖浓度较高。关于胆色，在当前胆汁系统中观察到矛盾的结果。在红色胆汁中检测到的水溶性多糖的浓度高于绿色胆汁中的水溶性多糖。果胶作为一种水溶性多糖，似乎与花青素的稳定性增加有关，该过程可能在胆汁中发生，导致红色。