School of Biological Sciences, University of East Anglia, NR4 7TJ, Norwich, UK.
J Chem Ecol. 1990 Dec;16(12):3523-9. doi: 10.1007/BF00982115.
Rapid hatching in the monogenean parasiteAcanthocotyle lobianchi from the skin ofRaja montagui is stimulated by urea. Structurally similar to the urea molecule, the following analogs of urea provide amino groups, carboxyl groups, or combinations of these, but fail to stimulate hatching at concentrations of 1 mM in seawater: methylurea (MU); 1, 3-dimethylurea (DU); 1, 1, 3, 3-tetramethylurea (TMU); thiourea (TU); 1, 1, 3, 3-tetramethyl-2-thiourea (TMTU); and 1-phenyl-2-thiourea (PTU). All of these analogs except PTU elicit movements of unhatched larvae, and posttreatment of the eggs with urea showed that the ability to hatch is not impaired by initial treatment with any of the urea analogs. Thus the larval chemoreceptor that initiates hatching appears to be highly specific for the urea molecule.
快速孵化在单殖吸虫寄生虫从 Raja montagui 的皮肤 Acanthocotyle lobianchi 是由尿素刺激。在结构上与尿素分子相似，以下尿素类似物提供氨基、羧基或这些的组合，但在 1 mM 的海水中不能刺激孵化：甲基脲 (MU)；1,3-二甲基脲 (DU)；1,1,3,3-四甲基脲 (TMU)；硫脲 (TU)；1,1,3,3-四甲基-2-硫脲 (TMTU)；和 1-苯基-2-硫脲 (PTU)。除了 PTU 之外，所有这些类似物都能引起未孵化幼虫的运动，并且用尿素处理这些卵后表明，初始用任何尿素类似物处理都不会损害孵化能力。因此，启动孵化的幼虫化学感受器似乎对尿素分子具有高度特异性。
