Sexual interaction ofEuplotes crassus: Differentiation of cellular surfaces in cell-to-cell union
1980; Elsevier BV; Volume: 77; Issue: 1 Linguagem: Inglês
10.1016/0012-1606(80)90464-9
ISSN1095-564X
AutoresPierangelo Luporini, Romano Dallai,
Tópico(s)Planarian Biology and Electrostimulation
ResumoA study by scanning electron microscope was performed to find out what cortical structures are differentiated by sexually interacting cells ofEuplotes crassus for their conjugant union. It was found that mixed cells of two complementary mating types, passed through an induction period, start uniting with each other by their ciliary membranelles which entwine around one another. Soon after, the two mating cells join more firmly by means of two linkages of the same type. Each linkage consists of the ciliary membranelles surrounding the left margin of the peristome of one pair's member to the ribbed wall limiting the right peristomial side of the partner. Remarkable changes in the architecture of the cellular cortex also occur after the initial interaction. In fact, an array of orderly longitudinal sequences of different kinds of protuberances is produced by just paired cells on their dorsal surface. In addition, membranelle cilia involved in the intercellular contact undergo discontinuous swelling along their length.
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