title: Morphological effects of juvenile hormone mimics on embryonic development in the bug,Pyrrhocoris apterus.
abstract: Embryos ofPyrrhocoris apterus exposed to juvenile hormone mimics (JH) were examined throughout development to determine the progressive effects of treatment. Prior to blastokinesis whole experimental embryos did not differ morphologically from control embryos fixed at the same stage. Treated embryos failed to complete blastokinesis due to abnormal breakage of the extra-embryonic membranes.In the embryo-larva transition, JH exposure interfered with dorsal closure, with the consolidation of the nerve cord, and with the extension of appendages. Yet pigmentation and muscle differentiation occurred.These effects were interpreted and discussed with reference to the role of juvenile hormone in post-embryonic development.
authors.affiliation: The Biological Laboratories, Harvard University, 02138, Cambridge, Massachusetts, USA.
authors.forename: Eugenie C
authors.initials: EC
authors.lastname: Enslee
authors.affiliation: The Biological Laboratories, Harvard University, 02138, Cambridge, Massachusetts, USA.
authors.forename: Lynn M
authors.initials: LM
authors.lastname: Riddiford
keywords: Blastokinesis mechanism; Hemiptera; Insect embryos; Juvenile hormone mimics; Nerve cord morphogenesis