LTR-RETROTRANSPOSONS AND MITES - IMPORTANT PLAYERS IN THE EVOLUTION OF PLANT GENOMES
LTR-RETROTRANSPOSONS AND MITES - IMPORTANT PLAYERS IN THE EVOLUTION OF PLANT GENOMES
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DOI：
10.1016/0959-437x(95)80016-x
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发表时间：
1995-12-01
影响因子：
4
通讯作者：
WHITE, SE
中科院分区：
文献类型：
--
作者：
WESSLER, SR;BUREAU, TE;WHITE, SE
反转录转座子是植物基因组中丰富而古老的组成部分，但最近的证据表明，许多现代植物中的元件活性仅限于逆境时期。植物反转录转座子的逆境激活可能是体细胞无性系变异的一个重要因素，也是分离新的活性元件的重要手段。最近发现，长末端重复反转录转座子和第二类元件被称为微型反向重复转座元件(MITE)，它们与多种植物的基因有关，其中一些参与了调控序列。由于其序列多样性和体积小，螨类可能是改变基因表达模式的一种有价值的进化工具。
Retrotransposons are an abundant and ancient component of plant genomes, yet recent evidence indicates that element activity in many modern plants is restricted to times of stress. Stress activation of plant retrotransposons may be a significant factor in somaclonal variation, in addition to providing an important means to isolate new active elements. Long terminal repeat retrotransposons and a second class of elements we have called miniature inverted-repeat transposable elements (MITEs) have recently been found to be associated with the genes of diverse plants where some contribute regulatory sequences. Because of their sequence diversity and small size, MITEs may be a valuable evolutionary tool for altering patterns of gene expression.