极地研究 ›› 2011, Vol. 22 ›› Issue (1-English): 35-41.DOI: 10.3724/SP.J.1085.2011.00035
LUO Wei1*, DAI CongJie2, LI HuiRong1 & GAO XiaoYan1,3
1 SOA Key Laboratory for Polar Science, Polar Research Institute of
2 Department of Biology,
3 College of Life Science and Technology , State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070,China
LUO Wei1*, DAI CongJie2, LI HuiRong1 & GAO XiaoYan1,3
1 SOA Key Laboratory for Polar Science, Polar Research Institute of
2 Department of Biology,
3 College of Life Science and Technology , State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070,China
摘要：
Because of the limitations of sampling and seasonal study in polar regions, knowledge of dinoflagellate diversity, distribution and ecology are limited. Dinoflagellates have been incidentally reported from polar regions during some seasons and some populations have been reported as components of microalgae. Surveys of molecular diversity link the genotype of dinoflagellates from polar regions with environmental adaptation. In this study, 37 positive clones of dinoflagellates collected from different sites were used for genotype analysis, providing new insights into the biodiversity and distribution of these species based on 18S rRNA sequencing. Diverse genotypes were recorded for the summer season in Kongsfjorden (high Arctic) whilst a single novel genotype of dinoflagellate was recorded from winter samples from the Antarctic Ocean. Data from ice cores suggests that this single dinoflagellate genotype was adapted to extreme cold and clone library screening found that it was occasionally the only microbial eukaryotic genotype found in winter ice cores. The findings of this study could improve our understanding of the diverse dinoflagellate genotypes occurring in these perennially cold microbial ecosystems.
