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Journal of Plankton Research Vol.25 no.3 pp.309-315, 2003
© Oxford University Press 2003

SHORT COMMUNICATION

Cluster analysis on the lectin binding patterns of marine microalgae

Eun Seob Cho1,

Harmful Algal Research Division, National Fisheries Research and Development Institute, Pusan 619-900, Korea

Corresponding Author: eseob{at}vet.ucm.es

1 Present Address: Laboratorio De Microalgas, Facultad De Veterinaria, Universidad Complutense De Madrid, 28040 Madrid, Spain

Fluorescent lectin binding patterns constructed using the Dollop parsimony method were analyzed to study the relationship of Gymnodiniales, the genus Prorocentrum, the genus Alexandrium and Bacillariophyceae. In Gymnodiniales, all of the tested Korean strains fluoresced with concanavalin A, PEA and soybean agglutinin; however, the lectins of LBL and pokeweed mitogen did not bind. The strains from Korea, New Zealand and Spain had almost the same topology and divided into three clusters. The cluster position of Korean strains was much closer to the New Zealand strains than to the Spanish strains. Many species of the genus Prorocentrum showed an opposite pattern to the Gymnodiniales. In the genera Alexandrium and Prorocentrum, the Korean strains were relatively closer to the Spanish strains than to the New Zealand strains. On the other hand, most species in the Bacillariophyceae did not show any binding patterns, indicating the lack of sugar moieties on the cell surfaces regardless of geographical separation. The centric diatoms Leptocylindrus danicus and Thalassiosira subtilis showed distant cluster relationships to group A (Thalassiosira rotula, Nitzschia sp., Stephanopyxis turris, Coscinodiscus gigas, Navicula sigma) and group B (Skeletonema costatum, Eucampia zodiacus, Rhizosolenia pungens). These results suggest that lectin binding patterns might be useful in understanding the relationship of discriminating microalgae between geographically distant sites.


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