Extrusive Organelles in Protists

摘要: Publisher Summary This chapter discusses the extrusive organelles in protists. Extrusive are membrane-bounded structures of protists, usually located cortical cytoplasm these cells. Although they have different type-specific and functions, all exhibit one general characteristic: readily discharged when subjected to a wide range stimuli. describes structural functional diversity extrusomes protozoa. Some distribution flagellates as well ciliates; others restricted small systematic groups, for example, discobolocysts flagellate order Chrysophyceae or cnidocysts few species dinoflagellates. enigmatic similarity exists between systematically widely differing organisms such ejectisomes algae R bodies bacterial symbionts Paramecium toxicysts ciliates nematocysts cnidarians.