植物中局部干细胞行为的分布式控制实例
A Case for Distributed Control of Local Stem Cell Behavior in Plants.
作者信息
Rahni Ramin, Efroni Idan, Birnbaum Kenneth D
机构信息
Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY 10003, USA.
The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University, Rehovot 76100, Israel.
出版信息
Dev Cell. 2016 Sep 26;38(6):635-42. doi: 10.1016/j.devcel.2016.08.015.
Abstract
The root meristem has a centrally located group of mitotically quiescent cells, to which current models assign a stem cell organizer function. However, evidence is emerging for decentralized control of stem cell activity, whereby self-renewing behavior emerges from the lack of cell displacement at the border of opposing differentiation gradients. We term this a "stagnation" model due to its reliance on passive mechanics. The position of stem cells is established by two opposing axes that reciprocally control each other's differentiation. Such broad tissue organization programs would allow plants, like some animal systems, to rapidly reconstitute stem cells from non-stem-cell tissues.
摘要
根分生组织有一组位于中心的有丝分裂静止细胞，当前模型认为这些细胞具有干细胞组织中心的功能。然而，越来越多的证据表明干细胞活性存在分散控制，即自我更新行为源于相反分化梯度边界处细胞位移的缺乏。由于其依赖被动力学，我们将此称为“停滞”模型。干细胞的位置由两个相互对立的轴确定，这两个轴相互控制对方的分化。这种广泛的组织组织程序将使植物像一些动物系统一样，能够从非干细胞组织中快速重建干细胞。
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