Thellier M, Demongeot J, Norris V, Guespin J, Ripoll C, Thomas R
Laboratoire AMMIS, FRE CNRS 2829, Faculté des Sciences, Université de Rouen, 76821 Mont-Saint-Aignan Cedex, France.
Plant Biol (Stuttg). 2004 Sep;6(5):590-7. doi: 10.1055/s-2004-821090.
When subjected to an appropriate asymmetric stimulus, seedlings of Bidens pilosa L. "store" a symmetry-breaking instruction that will finally take effect (in the form of a differential growth of the cotyledonary buds) only if the plants are in a state in which they can "recall" this information. The ability of the plants to recall the stored symmetry-breaking instruction may be switched "on" or "off" by the application of a variety of stimuli. Although its detailed phenomenology is rather complicated, the overall behaviour of the plant storage/recall system can be modelled by use of an asynchronous, logical (discrete) description involving positive and negative feedback circuits, which are required for the existence of multi-stationarity and stability, respectively. The state tables, as used in this formalism, give a concise and easy-to-handle description of the evolution of the system and make it particularly easy to determine its stable states. This modelling approach may be extended to the formulation of many other experimental systems.
当受到适当的不对称刺激时，三叶鬼针草的幼苗会“存储”一个打破对称性的指令，只有当植物处于能够“回忆”此信息的状态时，该指令才会最终生效（以子叶芽的差异生长形式）。植物回忆存储的打破对称性指令的能力可以通过施加各种刺激来“开启”或“关闭”。尽管其详细的现象学相当复杂，但植物存储/回忆系统的整体行为可以通过使用涉及正反馈和负反馈回路的异步逻辑（离散）描述来建模，这分别是多稳态和稳定性存在所必需的。这种形式主义中使用的状态表给出了系统演化的简洁且易于处理的描述，并使其特别容易确定其稳定状态。这种建模方法可以扩展到许多其他实验系统的表述。
