동중국해 및 동해에서의 Synechococcus 풍동 및 다양성

Abstract

Synechococcus, phycoerytherin containing cyanobacteria, are ubiquitously distributed in huge numbers and are dominant contributors to primary production and biomass in vast area of world's oceans. Although many investigations on distribution of Synechoccous and their diversity were conducted in various oceanic regions, there was few data in the wetsern Pacific ocean, especiallly for diversity of Synechococcus. We have investigated Synechococcus abundance in the East china Sea(ECS) and the East Sea (ES) since 2001 and maintained Synechococcus cultrues isolated from the surveys. Synechococcus abudances were counted by flow cytometry. Molecular phylogenetic relationships of 34 Synechoccous culture strains were studied using 16S rRNA gene sequences an 16S-23S rRNA ITS (internal transcribed spacer) sequences. IN addition, pigment chracteristics of the culture strains was also examined. The presence of novel lineages and the different pigment patterns in some cldes suggests a possibility that some Synechococcus lineages distribute only at geographically restricted areas and have evolved in there. Therefore, eludication of physiological, ecological and genetical characteritstics of the diverse Synechococcus strains is needed to understand their spatial and geographical distribution.