Academic Journal
| العنوان: | [Untitled] |
|---|---|
| المؤلفون: | A Ahmed Mansour, Ahmed Mansour |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://jcmb.halic.edu.tr/pdf/6-2/epigenetic_activation.pdf. |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Key Words, Retrotransposon, transposition, stress activation, epigenetic activation, LTR Genomik retrotranspozonların epigenetik aktivasyonu |
| الوصف: | Retrotransposons outnumber the genes in large plant genomes, thereby comprising the bulk of the genome. They are largely quiescent during development, but become more active under stress conditions. These ele-ments spread throughout the genome by a process termed retrotransposition, which includes transcription of an element into RNA, reverse transcription into cDNA, and reinsertion of the copied element into a new genomic location. Biotic and abiotic stresses are regular phenomena facing plants. Likewise, both retrotrans-posons and retroviruses can be stress-activated. Activation of retrotransposable elements can be induced by various stresses. In particular, long terminal repeat (LTR) retrotransposons, which were found in most plant species, are characterized by a high level of variability in the LTR sequences involved in transcription, and have evolved by gaining new expression patterns mostly associated with responses to diverse stress stimuli. Most of the plant LTR retrotransposons produce larger pools of transcripts in response to biotic and abiotic stress. Recently it was shown that the epigenetic activation of these mobile elements alters the expression of adjacent genes. The new insertions in or next to coding regions generate mutations that can lead to changes in gene expression and reshape the genome, both structurally and functionally. Thus, activation of LTR retrotransposable elements can play an essential role in plant development and evolution. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.385; http://jcmb.halic.edu.tr/pdf/6-2/epigenetic_activation.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.385 http://jcmb.halic.edu.tr/pdf/6-2/epigenetic_activation.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.41D1A3BE |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |