Factors governing cellular reprogramming competence in Arabidopsis adventitious root formation,Developmental Cell

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Factors governing cellular reprogramming competence in Arabidopsis adventitious root formation
Developmental Cell ( IF 10.7 ) Pub Date : 2024-07-22 , DOI: 10.1016/j.devcel.2024.06.019
Suresh Damodaran ₁ , Lucia C Strader ₁

Affiliation

Developmental reprogramming allows for flexibility in growth and adaptation to changing environmental conditions. In plants, wounding events can result in new stem cell niches and lateral organs. Adventitious roots develop from aerial parts of the plant and are regulated by multiple stimuli, including wounding. Here, we find that Arabidopsis thaliana seedlings wounded at the hypocotyl-root junction reprogram certain pericycle cells to produce adventitious roots proximal to the wound site. We have determined that competence for this reprogramming is controlled; basal cells close to the wound site can produce adventitious roots, whereas cells distal from the wound site mostly cannot. We found that altering cytokinin response or indole-3-butyric acid (IBA)-to-(indole-3-acetic acid) IAA conversion resulted in an expanded adventitious root competence zone and delineated the connection between these pathways. Our work highlights the importance of endogenous IBA-derived auxin and its interaction with cytokinin in adventitious root formation and the regenerative properties of plants.

中文翻译：

控制拟南芥不定根形成细胞重编程能力的因素

发育重编程允许灵活生长和适应不断变化的环境条件。在植物中，伤害事件会导致新的干细胞生态位和侧器官。不定根从植物的地上部分发育出来，并受到多种刺激的调节，包括受伤。在这里，我们发现在下胚轴-根连接处受伤的拟南芥幼苗重新编程某些周细胞，以在伤口部位附近产生不定根。我们已经确定这种重编程的能力是受控的;靠近伤口部位的基底细胞可以产生不定根，而远离伤口部位的细胞大多不能。我们发现改变细胞分裂素反应或吲哚-3-丁酸（IBA）到（吲哚-3-乙酸） IAA 转换导致不定根能力区扩大，并描绘了这些途径之间的联系。我们的工作强调了内源性 IBA 衍生生长素的重要性及其与细胞分裂素在不定根形成和植物再生特性中的相互作用。

更新日期：2024-07-22

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