Co-evolution of plant LTR-retrotransposons and their host genomes

作     者：Meixia Zhao Jianxin Ma 

作者机构：Department of AgronomyPurdue UniversityWest LafayetteIN 47907USA College of Life SciencesQingdao Agricultural UniversityQingdao 266109China 

出 版 物：《Protein & Cell》 (蛋白质与细胞（英文版）)

年 卷 期：2013年第4卷第7期

页      面：493-501页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 08[工学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 0836[工学-生物工程] 090102[农学-作物遗传育种] 

基　　金：supported by Purdue Agricultural Research Program Shandong Province Taishan Oversea Scholarship the United Soybean Board 

主　　题：LTR-retrotransposons recombination evolu-tion epigenetic regulation plants 

摘      要：Transposable elements(TEs),particularly,long terminal repeat retrotransposons(LTR-RTs),are the most abun-dant DNA components in all plant species that have been investigated,and are largely responsible for plant genome size *** plant genomes have experi-enced periodic proliferation and/or recent burst of LTR-retrotransposons,the majority of LTR-RTs are inactivated by DNA methylation and small RNA-mediated silencing mechanisms,and/or were deleted/truncated by unequal homologous recombination and illegitimate recombina-tion,as suppression mechanisms that counteract genome expansion caused by LTR-RT amplifi ***-RT DNA is generally enriched in pericentromeric regions of the host genomes,which appears to be the outcomes of pref-erential insertions of LTR-RTs in these regions and low effectiveness of selection that purges LTR-RT DNA from these regions relative to chromosomal *** functions of various TEs in their host genomes remain blurry;nevertheless,LTR-RTs have been recognized to play important roles in maintaining chromatin structures and centromere functions and regulation of gene expres-sions in their host genomes.