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首页> 外文期刊>Journal of Experimental Botany >Transcript profiling of Zea mays roots reveals gene responses to phosphate deficiency at the plant- and species-specific levels
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Transcript profiling of Zea mays roots reveals gene responses to phosphate deficiency at the plant- and species-specific levels

机译：玉米根的转录本谱揭示了在植物和物种特异性水平上对磷酸盐缺乏症的基因反应

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摘要

Maize (Zea mays) is the most widely cultivated crop around the world; however, it is commonly affected by phosphate (Pi) deficiency in many regions, particularly in acid and alkaline soils of developing countries. To cope with Pi deficiency, plants have evolved a large number of developmental and biochemical adaptations; however, for maize, the underlying molecular basis of these responses is still unknown. In this work, the transcriptional response of maize roots to Pi starvation at 1, 3, 6, and 10 d after the onset of Pi deprivation was assessed. The investigation revealed a total of 1179 Pi-responsive genes, of which 820 and 363 genes were found to be either up- or down-regulated, respectively, by 2-fold or more. Pi-responsive genes were found to be involved in various metabolic, signal transduction, and developmental gene networks. A large set of transcription factors, which may be potential targets for crop breeding, was identified. In addition, gene expression profiles and changes in specific metabolites were also correlated. The results show that several dicotyledonous plant responses to Pi starvation are conserved in maize, but that some genetic responses appear to be more specific and that Pi deficiency leads to a shift in the recycling of internal Pi in maize roots. Ultimately, this work provides a more comprehensive view of Pi-responses in a model for economically important cereals and also sets a framework to produce Pi-specific maize microarrays to study the changes in global gene expression between Pi-efficient and Pi-inefficient maize genotypes.
机译：玉米（Zea mays）是世界上种植最广泛的作物。但是，在许多地区，特别是在发展中国家的酸性和碱性土壤中，磷通常缺乏磷（Pi）。为了应对Pi缺乏症，植物已经进化出大量的发育和生化适应机制。然而，对于玉米而言，这些反应的潜在分子基础仍然未知。在这项工作中，评估了Pi剥夺开始后1、3、6和10 d玉米根对Pi饥饿的转录反应。调查发现总共有1179个Pi反应基因，其中820和363个基因分别被上调或下调2倍或更多倍。发现Pi反应基因参与各种代谢，信号转导和发育基因网络。鉴定了可能是作物育种潜在靶标的大量转录因子。此外，基因表达谱和特定代谢产物的变化也相关。结果表明，玉米中几个双子叶植物对Pi饥饿的反应均得以保留，但某些遗传反应似乎更为特异性，Pi缺乏导致玉米根内部Pi的循环利用发生转移。最终，这项工作为具有重要经济意义的谷物模型提供了对Pi响应的更全面了解，并为生产Pi特异性玉米微阵列建立了框架，以研究Pi高效和Pi无效玉米基因型之间全球基因表达的变化。 。

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