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首页> 外文期刊>Journal of cellular biochemistry. >Zm401, a short-open reading-frame mRNA or noncoding RNA, is essential for tapetum and microspore development and can regulate the floret formation in maize.
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Zm401, a short-open reading-frame mRNA or noncoding RNA, is essential for tapetum and microspore development and can regulate the floret formation in maize.

机译:Zm401是一种短开放阅读框架mRNA或非编码RNA,对于绒毡层和小孢子发育至关重要,并且可以调节玉米中的小花形成。

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In flowering plants, pollen formation depends on the differentiation and interaction of two cell types in the anther: the reproductive cells, called microsporocytes, and somatic cells that form the tapetum. Previously, we cloned a pollen specific gene, zm401, from a cDNA library generated from the mature pollen of Zea mays. Expression of partial cDNA of zm401 in maize and ectopic expression of zm401 in tobacco suggested it may play a role in anther development. Here we present the expression and functional characterization of this pollen specific gene in maize. Zm401 is expressed primarily in the anthers (tapetal cells as well as microspores) in a developmentally regulated manner. That is, it is expressed from floret forming stage, increasing in concentration up to mature pollen. Knockdown of zm401 significantly affected the expression of ZmMADS2, MZm3-3, and ZmC5, critical genes for pollen development; led to aberrant development of the microspore and tapetum, and finally male-sterility. Zm401 possesses highly conserved sequences and evolutionary conserved stable RNA secondary structure in monocotyledon. These data show that zm401 could be one of the key growth regulators in anther development, and functions as a short-open reading-frame mRNA (sORF mRNA) and/or noncoding RNA (ncRNA).
机译:在开花植物中,花粉的形成取决于花药中两种细胞类型的分化和相互作用:生殖细胞(称为微孢子细胞)和形成绒毡层的体细胞。以前,我们从玉米的成熟花粉产生的cDNA文库中克隆了花粉特异性基因zm401。玉米中zm401的部分cDNA的表达和烟草中zm401的异位表达提示其可能在花药发育中起作用。在这里,我们介绍该花粉特异性基因在玉米中的表达和功能表征。 Zm401主要通过发育调控的方式在花药(花瓣细胞和小孢子)中表达。即,从小花形成阶段开始表达,其浓度增加直至成熟花粉。击倒zm401会显着影响花粉发育的关键基因ZmMADS2,MZm3-3和ZmC5的表达。导致小孢子和绒毡层异常发育,最后导致雄性不育。 Zm401在单子叶植物中具有高度保守的序列和进化保守的稳定RNA二级结构。这些数据表明,zm401可能是花药发育中的关键生长调节剂之一,并具有短开放阅读框架mRNA(sORF mRNA)和/或非编码RNA(ncRNA)的功能。

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