Centromere and telomere sequence alterations reflect the rapid genome evolution within the carnivorous plant genus Genlisea.
Centromere and telomere sequence alterations reflect the rapid genome evolution within the carnivorous plant genus Genlisea.
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着丝粒和端粒序列的改变反映了食虫植物属内基因组的快速进化
DOI:
10.1111/tpj.13058
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Joerg Fuchs
中科院分区:
文献类型:
--
作者:
Trung D. Tran;Hieu X. Cao;Gabriele Jovtchev;Pavel Neumann;Petr Novák;Miloslava Fojtová;Giang T.H. Vu;Jiří Macas;Jiří Fajkus;Ingo Schubert;Joerg Fuchs
Linear chromosomes of eukaryotic organisms invariably possess centromeres and telomeres to ensure proper chromosome segregation during nuclear divisions and to protect the chromosome ends from deterioration and fusion, respectively. While centromeric sequences may differ between species, with arrays of tandemly repeated sequences and retrotransposons being the most abundant sequence types in plant centromeres, telomeric sequences are usually highly conserved among plants and other organisms. The genome size of the carnivorous genusGenlisea(Lentibulariaceae) is highly variable. Here we study evolutionary sequence plasticity of these chromosomal domains at an intrageneric level. We show thatGenlisea nigrocaulis(1C = 86 Mbp; 2n = 40) andG. hispidula(1C = 1550 Mbp; 2n = 40) differ as to their DNA composition at centromeres and telomeres.G. nigrocaulisand its close relativeG. pygmaearevealed mainly 161 bp tandem repeats, whileG. hispidulaand its close relativeG. subglabradisplayed a combination of four retroelements at centromeric positions.G. nigrocaulisandG. pygmaeachromosome ends are characterized by the Arabidopsis‐type telomeric repeats (TTTAGGG);G. hispidulaandG. subglabrainstead revealed two intermingled sequence variants (TTCAGG and TTTCAGG). These differences in centromeric and, surprisingly, also in telomeric DNA sequences, uncovered between groups with on average a > 9‐fold genome size difference, emphasize the fast genome evolution within this genus. Such intrageneric evolutionary alteration of telomeric repeats with cytosine in the guanine‐rich strand, not yet known for plants, might impact the epigenetic telomere chromatin modification.
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影响因子:
2.6
作者:
H. Weiss;H. Scherthan
通讯作者:
H. Scherthan
影响因子:
1.6
作者:
Adams, SP;Leitch, IJ;Leitch, AR
通讯作者:
Leitch, AR
DOI:
10.1073/pnas.93.25.14422
发表时间:
1996-12-10
影响因子:
11.1
作者:
Fitzgerald, MS;McKnight, TD;Shippen, DE
通讯作者:
Shippen, DE
DOI:
10.1007/s004380050918
发表时间:
1998-12-01
期刊:
MOLECULAR AND GENERAL GENETICS
影响因子:
--
作者:
Fajkus, J;Fulnecková, J;Matyásek, R
通讯作者:
Matyásek, R
DOI:
--
发表时间:
2003
期刊:
The Plant Journal
影响因子:
--
作者:
E. Sýkorová;K. Y. Lim;M. Chase;S. Knapp;I. Leitch;A. Leitch;J. Fajkus
通讯作者:
J. Fajkus