Flow cytometry(FCM) technique has been widely applied to estimating the genome size of various higher plants. However, there is few report about its application in algae. In this study, an optimized procedure of FCM w...Flow cytometry(FCM) technique has been widely applied to estimating the genome size of various higher plants. However, there is few report about its application in algae. In this study, an optimized procedure of FCM was exploited to estimate the genome size of two eukaryotic algae. For analyzing Alexandrium catenella, an important red tide species, the whole cell instead of isolated nucleus was studied, and chicken erythrocytes were used as an internal reference. The genome size of A. catenella was estimated to be 56.48 ± 4.14 Gb(1C), approximately nineteen times larger than that of human genome. For analyzing Gracilariopsis lemaneiformis, an important economical red alga, the purified nucleus was employed, and Arabidopsis thaliana and Chondrus crispus were used as internal references, respectively. The genome size of Gp. lemaneiformis was 97.35 ± 2.58 Mb(1C) and 112.73 ± 14.00 Mb(1C), respectively, depending on the different internal references. The results of this research will promote the related studies on the genomics and evolution of these two species.展开更多
The genetic information,stored in the linear sequences of DNA,encodes all of the genes that a living organism uses to produce proteins and RNAs essential for various cellular functions.In eukaryotes,however,genomic DN...The genetic information,stored in the linear sequences of DNA,encodes all of the genes that a living organism uses to produce proteins and RNAs essential for various cellular functions.In eukaryotes,however,genomic DNA is hierarchically and efficiently packaged into multiple-level chromatin structures within the nucleus,including the nucleosome,30 nm fibers,chromatin loops,topology associated domains(TADs).展开更多
基金supported by the National Natural Science Foundation of China (Nos.41176098 and 31372529)
文摘Flow cytometry(FCM) technique has been widely applied to estimating the genome size of various higher plants. However, there is few report about its application in algae. In this study, an optimized procedure of FCM was exploited to estimate the genome size of two eukaryotic algae. For analyzing Alexandrium catenella, an important red tide species, the whole cell instead of isolated nucleus was studied, and chicken erythrocytes were used as an internal reference. The genome size of A. catenella was estimated to be 56.48 ± 4.14 Gb(1C), approximately nineteen times larger than that of human genome. For analyzing Gracilariopsis lemaneiformis, an important economical red alga, the purified nucleus was employed, and Arabidopsis thaliana and Chondrus crispus were used as internal references, respectively. The genome size of Gp. lemaneiformis was 97.35 ± 2.58 Mb(1C) and 112.73 ± 14.00 Mb(1C), respectively, depending on the different internal references. The results of this research will promote the related studies on the genomics and evolution of these two species.
文摘The genetic information,stored in the linear sequences of DNA,encodes all of the genes that a living organism uses to produce proteins and RNAs essential for various cellular functions.In eukaryotes,however,genomic DNA is hierarchically and efficiently packaged into multiple-level chromatin structures within the nucleus,including the nucleosome,30 nm fibers,chromatin loops,topology associated domains(TADs).
