Science. 1964 Dec 25;146(3652):1690-1. doi: 10.1126/science.146.3652.1690.
Analogs of the purines, adenine and guanine, and of the pyrimidines, cytosine and uracil, completely inhibited two-dimensional differentiation in the gametophytes of the fern, Asplenium nidus L. Analogs of thymine caused a nonspecific growth inhibition without suppressing two-dimensional growth. The effects of the analogs were reversed by the respective bases or their derivatives.
嘌呤类似物腺嘌呤和鸟嘌呤，以及嘧啶类似物胞嘧啶和尿嘧啶，完全抑制了蕨类植物巢蕨配子体的二维分化。胸腺嘧啶类似物引起非特异性生长抑制，而不抑制二维生长。类似物的作用可以被相应的碱基或其衍生物逆转。
