02040nas a2200217   4500008004100000020001400041245009900055210006900154260001600223300001200239490000700251520139300258653001201651653001401663653001301677653001301690100002701703700002001730700002101750856005101771       2017                        eng d  a2211-926400aA new endoparasite <i>Olpidiopsis heterosiphoniae </i>sp. nov. that infects red algae in Korea0 anew endoparasite iOlpidiopsis heterosiphoniae isp nov that infec  c2017/12/01/  a264-2690 v283 a<p>A new species of Olpidiopsis, which infects dasyaceaen algae in Korea, is established. This endoparasite was first collected from Heterosiphonia pulchra, thus we named it O. heterosiphoniae. The infection process and asexual life history of O. heterosiphoniae were similar to previously reported Olpidiopsis species except for the cell type-specific infection in its host. The infection occurred mainly at the distal cells of determinate branches and was rarely observed in the other parts of the filament. The pathogen was transferred to another host, Heterosiphonia japonica, and the host-parasite dual culture has been kept in the laboratory for more than ten years since it was collected in May 2006. Up to 15 sporangia of 20&ndash;100&mu;m in size developed in a single infected host cell. One sporangium contained between 8 and 128 zoospores at maturity. Zoospores were kidney-shaped, 3&ndash;4&mu;m in size, with two laterally inserted flagella. Multigene analyses combining 18S rRNA, cox1 and cox2 genes showed that O. heterosiphoniae belonged to the lineage infecting filamentous red algae from the orders Ceramiales and Bonnemaisoniales. Epidemiological studies in Pyropia farms in Korea showed that O. heterosiphoniae may not be a main causative agent of Olpidiopsis blight in sea farms, although it is able to occasionally infect gametophyte blades of Pyropia tenera.</p>
10adisease10aOomycetes10aPathogen10aSSU rRNA1 aKlochkova, Tatyana, A.1 aKwak, Min, Seok1 aKim, Gwang, Hoon  uhttps://algaldiseases.myspecies.info/node/1692