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首页> 外文期刊>Journal of Experimental Botany >Small RNA activity and function in angiosperm gametophytes
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Small RNA activity and function in angiosperm gametophytes

机译：被子植物配子体中的小RNA活性和功能

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Small non-coding RNAs are key post-transcriptional and transcriptional regulators of plant gene expression in angiosperm sporophytes. In recent years, gametophytic small RNAs have also been investigated, predominantly in Arabidopsis male gametophytes, revealing features in common with the sporophyte as well as some surprising differences. Transcriptomic and deep-sequencing studies confirm that multiple small RNA pathways operate in male gametophytes, with over 100 miRNAs detected throughout development. Trans-acting siRNA pathways that are associated with novel phased transcripts in pollen, and the nat-siRNA pathway have important roles in pollen maturation and gamete function. Moreover, a role for siRNA-triggered silencing of transposable elements in male and female germ cells has been established, a feature in common with the role of piRNAs in animal germlines. Current evidence supports an integral role for small RNAs in angiosperm gametophyte development and it can be anticipated that novel small RNAs with significant roles in germline development and genome integrity await discovery.
机译：小的非编码RNA是被子植物孢子体中植物基因表达的关键转录后和转录调节因子。近年来，还对配子体小RNA进行了研究，主要是在拟南芥雄配子体中，揭示了与子孢子体共有的特征以及一些令人惊讶的差异。转录组学和深度测序研究证实，在雄配子体中有多个小RNA途径起作用，在整个发育过程中检测到100多个miRNA。与花粉中新的阶段性转录物相关的反式siRNA途径和nat-siRNA途径在花粉成熟和配子功能中具有重要作用。此外，已经确定了在雄性和雌性生殖细胞中siRNA触发的转座因子沉默的作用，这是piRNA在动物种系中的作用共有的特征。目前的证据支持小RNA在被子植物配子体发育中的不可或缺的作用，可以预料，在种系发育和基因组完整性中具有重要作用的新型小RNA有待发现。

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