A predictive model for ethylene-mediated auxin and cytokinin patterning in the Arabidopsis root  

作　　者：Simon Moore George Jervis Jennifer F.Topping Chunli Chen Junli Liu Keith Lindsey 

机构地区：[1]Department of Biosciences,Durham University,South Road,Durham DH13LE,UK [2]Hubei Hongshan Laboratory,College of Life Science and Technology,Huazhong Agricultural University,Wuhan 430070,China [3]National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops,Huazhong Agricultural University,Wuhan,Hubei 430070,China

出　　处：《Plant Communications》2024年第7期120-137,共18页植物通讯（英文）

基　　金：gratefully acknowledges the Advanced Foreign Experts Project(G2023157014L);the Cultivating Fund Project of Hubei Hongshan Laboratory(2022hspy002).

摘　　要：The interaction between auxin and cytokinin is important in many aspects of plant development.Experimental measurements of both auxin and cytokinin concentration and reporter gene expression clearly show the coexistence of auxin and cytokinin concentration patterning in Arabidopsis root development.However,in the context of crosstalk among auxin,cytokinin,and ethylene,little is known about how auxin and cytokinin concentration patterns simultaneously emerge and how they regulate each other in the Arabidopsis root.This work utilizes a wide range of experimental observations to propose a mechanism for simultaneous patterning of auxin and cytokinin concentrations.In addition to revealing the regulatory relationships between auxin and cytokinin,this mechanism shows that ethylene signaling is an important factor in achieving simultaneous auxin and cytokinin patterning,while also predicting other experimental observations.Combining the mechanism with a realistic in silico root model reproduces experimental observations of both auxin and cytokinin patterning.Predictions made by the mechanism can be compared with a variety of experimental observations,including those obtained by our group and other independent experiments reported by other groups.Examples of these predictions include patterning of auxin biosynthesis rate,changes in PIN1 and PIN2 patterns in pin3,4,7 mutants,changes in cytokinin patterning in the pls mutant,PLS patterning,and various trends in different mutants.This research reveals a plausible mechanism for simultaneous patterning of auxin and cytokinin concentrations in Arabidopsis root development and suggests a key role for ethylene pattern integration.

关 键 词：Arabidopsis root auxin patterning cytokinin patterning ethylene signaling in silico digital root spatiotemporal modeling 

分 类 号：Q94[生物学—植物学]