01788nas a2200217   4500008004100000020001400041245014100055210006900196260001500265300001400280490000700294520110900301100001801410700001401428700001501442700001501457700001401472700001601486700001401502856005401516       2013                        eng d  a1573-517600aCharacterizing the microbial culprit of white spot disease of the conchocelis stage of <i>Porphyra yezoensis</i> (Bangiales, Rhodophyta)0 aCharacterizing the microbial culprit of white spot disease of th  c2013/10/01  a1341-13480 v253 a<p>White spot disease is the most frequent and harmful disease affecting the shell-boring conchocelis stage of the economically important red alga Porphyra yezoensis (= Pyropia yezoensis (Ueda) Hwang &amp; Choi) (Bangiales, Rhodophyta). To date, its potential pathogens and pathogenesis remain poorly understood. In this study, we isolated 7 bacteria, 26 fungi, and 10 actinomycetes from sick conchocelis. Re-infection experiments revealed that only one fungus, GF014, caused disease. Morphological characteristics of the colony, mycelium, sporangium, and spore of GF014 suggested that the strain belongs to the order Pleosporales and the genus Phoma. Classification based on internal transcribed spacer (ITS) sequences supported the results of morphological identification. These results indicate that GF014 is a species of Phoma and a specific pathogen for Porphyra. GF014 preferred organic nitrogen sources, and 20&ndash;28&nbsp;&deg;C and low salinity water were its optimal living conditions. Our findings will play an active role in preventing and treating white spot disease in P. yezoensis.</p>
1 aGuan, Xiangyu1 aLi, Jinbo1 aZhang, Zhe1 aLi, Fuchao1 aYang, Rui1 aJiang, Peng1 aQin, Song  uhttps://algaldiseases.myspecies.info/de/node/1700