A VIRUS INFECTION IN MYRIOTRICHIA CLAVAEFORMIS (DICTYOSIPHONALES, PHAEOPHYCEAE) FROM ARGENTINA

摘要

Virus-infected plants of Myriotrichia clavaeformis from the coast of Argentina are sterile and produce virus particles in later al vesicles homologous to plurilocular sporangia of normal plants. Virions are released into the surrounding sea water and can infect swimming spores of healthy Myriotrichia plants. Virus particles are hexagonal in cross section with a diameter of 170-180 nm and have an envelope with an electron dense core. Similar viruses are known for several genera in the order Ectocarpales. This is the first record of an infectious agent in the order Dictyosiphonales, which contains thalli with more complex tissues and life histories. [References: 24]