接连在文章的标题中看到piRNA这个关键词，以及piRNA pathway是一种抑制转座子活性的机制，让我对它产生了点兴趣。于是进行了简单的文献检索。粗略一扫，发现竟然没有植物的相关报道。这样一种重要的机制只在动物中存在好像是说不通的，即使没有可能还有另外一个问题，植物中控制转座子的激活，是什么机理？所以感觉这东西，还有点意思。piRNA pathway还和分离紊乱有关。有篇文章的标题是： Mutations to the piRNA Pathway Component aubergine Enhance Meiotic Drive of Segregation Distorter in Drosophila melanogaster.（有个水稻和分离紊乱相关的基因已经克隆了，好像是张启发老师发表在SCIENCE上的文章，呵呵这个基因和piRNA是不是有关系呢？）。检索的结果张贴在下面（检索方法，在EndNOTE上用piRNA作为关键字检索pubMed数据库），有做植物的对此感兴趣的朋友可以看看，我只需要记住有个这样奇妙的东西就行了。关于piRNA最早的报道是在2006年。那天我在微博中还写了句“这东西可能会火”，原来已经火了。

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