Multiple pathways regulate shoot branching.
Multiple pathways regulate shoot branching.
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DOI：
10.3389/fpls.2014.00741
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发表时间：
2014
影响因子：
5.6
通讯作者：
Sakr S
中科院分区：
文献类型：
--
作者：
Rameau C;Bertheloot J;Leduc N;Andrieu B;Foucher F;Sakr S
枝条分枝模式是腋芽生长时空调控的结果。许多内源、发育和环境因素在花蕾和植株水平上被整合在一起，以决定生长的新梢数量。最有可能涉及的是汇聚到公共积分器的多条路径。我们提出了几条途径，不仅涉及经典激素生长素、细胞分裂素和内酯，而且还涉及其他对枝条分枝有强烈影响的信号，如赤霉素、糖或植物相变的分子因子。我们还讨论了最近关于遮荫反应的分子机制和途径的发现，作为控制分支的环境信号的例子。我们认为teosinte BRANCHED1、CycloidEA、PCF转录因子TB1/BRC1和茎中的生长素极性运输流可能是这些途径的整合因子。最后，我们讨论建模如何通过清楚地表达知识和假设并计算它们所暗示的表型属性来帮助表示这个高度动态的系统。
Shoot branching patterns result from the spatio-temporal regulation of axillary bud outgrowth. Numerous endogenous, developmental and environmental factors are integrated at the bud and plant levels to determine numbers of growing shoots. Multiple pathways that converge to common integrators are most probably involved. We propose several pathways involving not only the classical hormones auxin, cytokinins and strigolactones, but also other signals with a strong influence on shoot branching such as gibberellins, sugars or molecular actors of plant phase transition. We also deal with recent findings about the molecular mechanisms and the pathway involved in the response to shade as an example of an environmental signal controlling branching. We propose the TEOSINTE BRANCHED1, CYCLOIDEA, PCF transcription factor TB1/BRC1 and the polar auxin transport stream in the stem as possible integrators of these pathways. We finally discuss how modeling can help to represent this highly dynamic system by articulating knowledges and hypothesis and calculating the phenotype properties they imply.
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