Experiment Station of the Hawaiian Sugar Planters' Association, Honolulu, Hawaii.
Plant Physiol. 1966 Mar;41(3):369-72. doi: 10.1104/pp.41.3.369.
The translocation of (14)C-photosynthate in detached blades of sugarcane was studied under illumination from red, green, blue, and cool-white fluorescent lamps; under far-red illumination from the sun, and from incandescent lamps; and in total darkness.The percentage of basipetal translocation and the accumulation against the concentration gradient were stimulated by light from the red or blue lamps more than by green or cool-white fluorescent illumination.Basipetal translocation took place equally well in red light lacking blue irradiation and in blue light. Since the action spectrum for light-induced change in viscosity is a typical blue-type spectrum, the effect of light upon translocation is not due merely to changes in the physicochemical properties of protoplasm.Basipetal translocation took place in red light lacking blue irradiation better than in cool-white fluorescent light, which may suggest a red stimulation of translocation.Illumination in the far-red region of the spectrum did not support basipetal translocation but acted like total darkness.Because of the wide emission characteristics of the fluorescent lamps employed, it is impossible to decide whether a chlorophyll-like system or some other pigment is involved in the light stimulation of phototranslocation.Whatever the activating wavelength and whatever the pigment system involved, these results show that the phototranslocation of sucrose in the phloem is influenced by the quality of illumination.
（14）C 光合产物在甘蔗离体叶片中的运转，分别在红光、绿光、蓝光和冷白荧光灯下，在太阳光的远红光下，在白炽灯下，以及在完全黑暗中进行了研究。与绿光或冷白荧光照明相比，红光或蓝光的光照更能刺激顺浓度梯度的向基运转和积累。在缺乏蓝光辐照的红光中以及在蓝光中，向基运转同样良好。由于诱导粘度变化的光作用光谱是典型的蓝型光谱，因此，光对运转的影响不仅仅是由于原生质物理化学性质的变化。在缺乏蓝光辐照的红光中向基运转比在冷白荧光光中更好，这可能表明红光刺激了运转。在光谱的远红光区域的光照不能支持向基运转，而类似于完全黑暗。由于所使用的荧光灯具有广泛的发射特性，因此不可能确定是叶绿素样系统还是其他一些色素参与了光对光运转的刺激。无论激活波长和所涉及的色素系统如何，这些结果都表明，韧皮部中蔗糖的光运转受光照质量的影响。
