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首页> 外文期刊>Journal of genetics >A spectrum of genes expressed during early stages of rice panicle and flower development
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A spectrum of genes expressed during early stages of rice panicle and flower development

机译：水稻穗和花发育早期表达的基因谱

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To unravel gene expression patterns during rice inflorescence development, particularly at early stages of panicle and floral organ specification, we have characterized random cloned cDNAs from developmental-stage-specific libraries. cDNA libraries were constructed from rice panicles at the stage of branching and flower primordia specification or from panicles undergoing floral organogenesis. Partial sequence analysis and expression patterns of some of these random cDNA clones from these two rice panicle libraries are presented. Sequence comparisons with known DNA sequences in databases reveal that approximately sixtyeight per cent of these expressed rice genes show varying degrees of similarity to genes in other species with assigned functions. In contrast, thirtytwo per cent represent uncharacterized genes. cDNAs reported here code for potential rice homologues of housekeeping molecules, regulators of gene expression, and signal transduction molecules. They comprise both single-copy and multicopy genes, and genes expressed differentially, both spatially and temporally, during rice plant development. New rice cDNAs requiring specific mention are those with similarity to COP1, a regulator of photomorphogenesis in Arabidopsis; sequence-specific DNA binding plant proteins like AP2-domain-containing factors; genes that specify positional information in shoot meristems like leucine-rich-repeat-containing receptor kinases; regulators of chromatin structure like Polycomb domain protein; and also proteins induced by abiotic stresses.
机译：为了揭示水稻花序发育过程中的基因表达模式，特别是在穗和花器官规格的早期阶段，我们从发育阶段特异性文库中表征了随机克隆的cDNA。 cDNA文库是从处于分支和花原基发育期的水稻穗或经历花器官发生的穗中构建的。介绍了来自这两个水稻穗文库的一些随机cDNA克隆的部分序列分析和表达模式。与数据库中已知DNA序列的序列比较显示，这些表达的水稻基因中约有68％与具有指定功能的其他物种的基因显示出不同程度的相似性。相反，百分之三十二代表未表征的基因。此处报道的cDNA编码了看家分子的潜在水稻同源物，基因表达的调节剂和信号转导分子。它们包括单拷贝和多拷贝基因，以及在水稻​​植物发育过程中在空间和时间上差异表达的基因。需要特别提及的新水稻cDNA是与拟南芥中光形态发生调节因子COP1相似的cDNA。序列特异性DNA结合植物蛋白，例如含AP2域的因子;在芽分生组织中指定位置信息的基因，例如富含亮氨酸重复序列的受体激酶;染色质结构的调节剂，如Polycomb域蛋白;以及非生物胁迫诱导的蛋白质。

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