01759nas a2200169   4500008004100000020001400041245013000055210006900185260001500254520116600269100001201435700003001447700002201477700001701499700001901516856005401535       2019                        eng d  a1573-517600aAlgal endophytes of commercial <i>Chondrus ocellatus</i> (Gigartinaceae, Rhodophyta) from different wild populations in Korea0 aAlgal endophytes of commercial iChondrus ocellatusi Gigartinacea  c2019/12/053 aThis study quantified the spatial variation of endophyte infections in wild populations of commercially important Chondrus ocellatus in Korea. We examined the variation of infection across four locations, two tidal heights and life-history stage (gametophyte vs tetrasporophyte). One hundred and fifty fronds were collected from the upper and lower C. ocellatus zones and microscopic examinations were conducted to determine their infection symptoms. Our results showed that the percentage of C. ocellatus populations infected by endophytic algae were very high, ranging from 58 to 99%, in all populations examined. Endophyte infection severity of Hakampo and Manripo populations was significantly greater in the lower Chondrus zones but it was significantly higher in the upper zone of Jungdori population. Tetrasporophytic fronds were more susceptible to infection by endophytic algae than gametophytic fronds. Also, the infection symptoms were more severe in the middle and basal parts of the fronds than in the apical parts. The findings of this study are very informative data for the endophyte abundance in the field population of commercial C. ocellatus.1 aGao, Xu1 aOgandaga, Cyr, Abel Maran1 aPark, Seo, Kyoung1 aOh, Ji, Chul1 aChoi, Han, Gil  uhttps://algaldiseases.myspecies.info/de/node/1704