The normal development of the higher plant occurs only in light (photomorphogenesis). The effect of light is due to intracellular development of a morphogenetically active effector molecule (Pfr, a chromoprotein). The point in question is, by which pathways the homeostasis of development (the course of development directed by endogenic factors) and the environmental factor "light" may act together in photomorphogenesis in order to accomplish the normal development of plants. Physiological and molecular analysis of photomorphogenesis is to contribute basically to the problem of surveying the pathways of gens and environmental influences in determining the characteristics of higher organisms, man included. The logical order of the phenomena is shown to have the precedence of an attempt for molecular analysis of photomorphogenesis. A result of the logical order is the insight that all the phenomena induced by Pfr present the spatial and temporal pattern of "primary differentiation". This primary differentiation (= formation of the specific competence) does not depend on light (developmental homeostasis). The photomorphogenesis (= development through the presence of Pfr of the pattern due to the primary differentiation), in accordance with the present knowledge is to be attributed to differential enzymatic induction and repression. This opinion is confirmed by examples. The correlation between the enzymatic activity and the structure (form, shape) still remains an unsolved problem.
高等植物的正常发育仅在光照下发生（光形态建成）。光的作用归因于一种形态发生活性效应分子（Pfr，一种色素蛋白）在细胞内的发育。问题在于，在光形态建成过程中，发育的稳态（由内源因素主导的发育进程）和环境因素“光”通过哪些途径共同作用，以实现植物的正常发育。光形态建成的生理和分子分析对于探究基因和环境影响在决定包括人类在内的高等生物特征方面的途径问题具有基础性贡献。结果表明，现象的逻辑顺序优先于对光形态建成进行分子分析的尝试。逻辑顺序的一个结果是认识到，由Pfr诱导的所有现象呈现出“初级分化”的时空模式。这种初级分化（=特定能力的形成）不依赖于光（发育稳态）。根据目前的知识，光形态建成（=由于初级分化而通过Pfr存在的模式进行的发育）应归因于酶的差异诱导和抑制。这一观点通过实例得到了证实。酶活性与结构（形态、形状）之间的相关性仍然是一个未解决的问题。
