Kahl O, Hoff R, Knülle W
Institut für Angewandte Zoologie, Freie Universität Berlin, West Germany.
Exp Appl Acarol. 1990 Oct;9(3-4):239-58. doi: 10.1007/BF01193431.
The gross morphological changes in the salivary glands of Ixodes ricinus (L.) were investigated at the light microscopic level in various phases off the host with emphasis on the engorged nymph, in order to relate the capability of active vapour uptake in the course of postembryonal development to degeneration and regeneration of salivary-gland alveoli. Agranular alveoli in engorged immatures of I. ricinus, from detachment to the following early pharate phase, do not appear different from those of the unfed instars. This is also true for the female up to approximately the end of oviposition. During moulting, the agranular alveoli of the immatures degenerate and new ones are formed which are apparently already functional in teneral nymphs and adults. In contrast, granular alveoli, much enlarged in freshly detached immature I. ricinus, shrivel in the early post-repletion period and soon reach a highly reduced state which is maintained until apolysis. Subsequently, they disintegrate completely. The finding that engorged and detached immatures of I. ricinus with markedly atrophied granular alveoli are capable of active vapour uptake until some days after initiation of apolysis suggests that only agranular alveoli are responsible for producing the primary secretion involved in vapour uptake.
在光镜水平下，研究蓖麻硬蜱唾液腺在寄生于宿主的不同阶段的大体形态变化，重点关注饱血若虫，目的是将胚胎后期发育过程中主动吸收水汽的能力与唾液腺腺泡的退化和再生联系起来。蓖麻硬蜱饱血未成熟个体从脱离宿主到随后的早期蛹化阶段，无颗粒腺泡与未进食龄期的腺泡并无差异。雌性在产卵结束前也同样如此。在蜕皮过程中，未成熟个体的无颗粒腺泡退化并形成新的腺泡，这些新腺泡在嫩若虫和成虫中显然已经发挥功能。相比之下,刚脱离宿主的蓖麻硬蜱未成熟个体中明显增大的颗粒腺泡，在饱血后早期皱缩，并很快达到高度萎缩状态，直至蜕皮前都保持这种状态。随后，它们完全解体。蓖麻硬蜱饱血并脱离宿主后，颗粒腺泡明显萎缩，但在蜕皮开始后的几天内仍能主动吸收水汽，这一发现表明，只有无颗粒腺泡负责产生参与水汽吸收的初级分泌物。
