Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado 80309.
Plant Physiol. 1977 Nov;60(5):805-6. doi: 10.1104/pp.60.5.805.
The sporangiophore of Phycomyces shows a transient response to a double barrier, the avoidance growth response. Tensile tests conducted on the stage IV sporangiophore demonstrate that an increase in mechanical extensibility occurs about a minute after a double barrier stimulus. This change in mechanical extensibility is similar to the one that occurs after a light stimulus. We have concluded that the avoidance stimulus occurs somewhere on the same pathway between the photoreceptor mechanism and the final growth response.
藻菌的游动孢子梗对双障碍(回避生长反应)表现出瞬时响应。在 IV 期游动孢子梗上进行的拉伸测试表明,在双障碍刺激后约一分钟,机械延伸性增加。这种机械延伸性的变化与光刺激后发生的变化相似。我们得出结论,回避刺激发生在光感受器机制和最终生长反应之间的同一途径上的某个位置。