A suberized exodermis is required for tomato drought tolerance.

A suberized exodermis is required for tomato drought tolerance.
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DOI:
10.1038/s41477-023-01567-x
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发表时间:
2024-01
期刊:
影响因子:
18
通讯作者:
Brady, Siobhan M.
Brady, Siobhan M.
中科院分区:
生物学1区
文献类型:
--
作者:
Canto-Pastor, Alex;Kajala, Kaisa;Shaar-Moshe, Lidor;Manzano, Concepcion;Timilsena, Prakash;De Bellis, Damien;Gray, Sharon;Holbein, Julia;Yang, He;Mohammad, Sana;Nirmal, Niba;Suresh, Kiran;Ursache, Robertas;Mason, G. Alex;Gouran, Mona;West, Donnelly A.;Borowsky, Alexander T.;Shackel, Kenneth A.;Sinha, Neelima;Bailey-Serres, Julia;Geldner, Niko;Li, Song;Franke, Rochus Benni;Brady, Siobhan M.

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植物根系利用精细的时空控制将环境信号与发育整合在一起。这在木栓质的沉积中是明显的,木栓质是一种质外体扩散屏障,其调节水、溶质和气体的流动,并且是环境塑性的。Suberin被认为是内胚层分化的标志,但在番茄内皮层中不存在。相反,木栓质存在于外皮层,一种在模式生物拟南芥中不存在的细胞类型。在这里,我们证明了木栓素调控网络具有相同的部分驱动木栓素生产在番茄外皮层和拟南芥内皮层。尽管网络组件有这种共同选择,但网络已经经历了重新布线,以驱动不同的空间表达,并具有特定基因的不同贡献。番茄MYB92转录因子和ASFT酶的功能遗传分析表明,植物水分亏缺反应的外胚层木栓质的重要性,外胚层屏障的功能相当于内皮层的功能,可以在其位置上发挥作用。植物根可以通过改变细胞类型发育来响应环境。在这里,控制根外胚层木栓质的分子途径的定义,因为它在干旱反应中的作用。调节外胚层木栓质水平可以是改善植物环境适应性的目标。
Plant roots integrate environmental signals with development using exquisite spatiotemporal control. This is apparent in the deposition of suberin, an apoplastic diffusion barrier, which regulates flow of water, solutes and gases, and is environmentally plastic. Suberin is considered a hallmark of endodermal differentiation but is absent in the tomato endodermis. Instead, suberin is present in the exodermis, a cell type that is absent in the model organism Arabidopsis thaliana. Here we demonstrate that the suberin regulatory network has the same parts driving suberin production in the tomato exodermis and the Arabidopsis endodermis. Despite this co-option of network components, the network has undergone rewiring to drive distinct spatial expression and with distinct contributions of specific genes. Functional genetic analyses of the tomato MYB92 transcription factor and ASFT enzyme demonstrate the importance of exodermal suberin for a plant water-deficit response and that the exodermal barrier serves an equivalent function to that of the endodermis and can act in its place. Plant roots can respond to the environment by modifying cell type development. Here, the molecular pathways controlling root exodermal suberin are defined, as is its role in drought response. Modulating exodermal suberin levels can be a target for improved plant environmental resilience.
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