Ortega J K, Gamow R I
Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado 80302.
Plant Physiol. 1976 Mar;57(3):456-7. doi: 10.1104/pp.57.3.456.
The sporangiophore of Phycomyces responds to a temporary increase in light intensity with a transient increase in growth rate that begins 2 to 3 minutes after the initiation of the stimulus and continues until approximately the 12th minute. Tensile tests conducted on the stage IVb sporangiophore demonstrate that an increase in mechanical extensibility of the cell wall occurs 2 minutes after the initiation of a light stimulus and continues until approximately the 15th minute. This finding supports the theory that light-stimulated plant cell expansion and rate of expansion is a function of the mechanical extensibility of the cell wall.
毛霉的孢子囊柄对光照强度的暂时增加会做出反应，其生长速率会短暂提高，这种提高在刺激开始后2至3分钟开始，并持续到大约第12分钟。对IVb期孢子囊柄进行的拉伸试验表明，在光刺激开始后2分钟，细胞壁的机械伸展性增加，并持续到大约第15分钟。这一发现支持了以下理论：光刺激的植物细胞扩张及扩张速率是细胞壁机械伸展性的一个函数。
