Temporal and spatial auxin responsive networks in maize primary roots.

Quantitative Plant Biology Pub Date : 2022-10-03 eCollection Date: 2022-01-01 DOI:10.1017/qpb.2022.17
Maxwell R McReynolds, Linkan Dash, Christian Montes, Melissa A Draves, Michelle G Lang, Justin W Walley, Dior R Kelley
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引用次数: 0

Abstract

Auxin is a key regulator of root morphogenesis across angiosperms. To better understand auxin-regulated networks underlying maize root development, we have characterized auxin-responsive transcription across two time points (30 and 120 min) and four regions of the primary root: the meristematic zone, elongation zone, cortex and stele. Hundreds of auxin-regulated genes involved in diverse biological processes were quantified in these different root regions. In general, most auxin-regulated genes are region unique and are predominantly observed in differentiated tissues compared with the root meristem. Auxin gene regulatory networks were reconstructed with these data to identify key transcription factors that may underlie auxin responses in maize roots. Additionally, Auxin-Response Factor subnetworks were generated to identify target genes that exhibit tissue or temporal specificity in response to auxin. These networks describe novel molecular connections underlying maize root development and provide a foundation for functional genomic studies in a key crop.

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Abstract Image

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玉米主根的时空辅助素反应网络
在所有被子植物中,叶绿素是根形态发生的关键调控因子。为了更好地了解玉米根系发育所依赖的辅助素调控网络,我们对两个时间点(30 分钟和 120 分钟)和主根的四个区域(分生区、伸长区、皮层和支柱)的辅助素响应转录进行了表征。在这些不同的根区,对数百个参与不同生物过程的辅助素调控基因进行了量化。一般来说,大多数受植物生长素调控的基因都具有区域独特性,与根分生组织相比,它们主要分布在分化组织中。利用这些数据重建了叶绿素基因调控网络,以确定玉米根部叶绿素反应的关键转录因子。此外,还生成了叶黄素反应因子子网络,以确定在对叶黄素的反应中表现出组织或时间特异性的靶基因。这些网络描述了玉米根系发育的新分子联系,并为这一重要作物的功能基因组研究奠定了基础。
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