Castle E S
J Gen Physiol. 1966 May;49(5):925-35. doi: 10.1085/jgp.49.5.925.
A kinetic model is described consisting of two sequential first order processes connected by two parallel reaction pathways, one of which is light-catalyzed. A change in light flux changes the rate constant of the light-dependent process, whereupon the levels of two chemical intermediaries readjust. The model's output duplicates all the main features of the cell's light-growth and dark-growth responses except their latent periods. An asymmetric modification of the model reproduces the two types of phototropic inversion discovered by Reichardt and Varjú and by Dennison. Simple exponential equations describe these responses of the model, as well as the theoretical course of its light and dark adaptation. It is concluded that adaptation in Phycomyces consist in the photocatalytic adjustment of the level of a metabolic reservoir.
描述了一个动力学模型，它由两个通过两条平行反应途径相连的连续一级过程组成，其中一条是光催化的。光通量的变化会改变光依赖过程的速率常数，随之两种化学中间体的水平会重新调整。该模型的输出复制了细胞光生长和暗生长反应的所有主要特征，除了它们的潜伏期。对该模型进行不对称修改可再现由赖夏德特和瓦尔朱以及丹尼森发现的两种向光性反转类型。简单的指数方程描述了该模型的这些反应以及其光适应和暗适应的理论过程。得出的结论是，藻状菌中的适应在于对代谢储备水平的光催化调节。
