Hansen J, Strömquist L H, Ericsson A
Department of Plant Physiology, University of Umeå, S-901 87 Umeå, Sweden.
Plant Physiol. 1978 Jun;61(6):975-9. doi: 10.1104/pp.61.6.975.
Seedlings of Pinus sylvestris L. were grown for 6 weeks at an irradiance of either 8 or 40 watts per square meter in a controlled environment room. Cuttings from these plants were rooted in tap water for 75 days at either 8 or 40 watts per square meter. The photoperiod was 17 hours.During the first 30 days of the rooting period quantitative changes in carbohydrates were recorded in cuttings from the different treatments. The carbohydrate contents of the cuttings were mainly regulated by the irradiance during the stock plant stage and generally a higher carbohydrate level was found in cuttings from stock plants grown at 40 watts per square meter.The irradiance during the rooting period had only minor effects on the time course of root formation, whereas the irradiance during the stock plant stage did influence the subsequent root formation. Cuttings from stock plants grown at 8 watts per square meter rooted faster and with higher frequency than those from stock plants grown at 40 watts per square meter. These results are discussed in relation to the mentioned irradiance effects on carbohydrate content.
欧洲赤松幼苗在可控环境室内以每平方米8瓦或40瓦的光照强度生长6周。这些植株的插条在每平方米8瓦或40瓦的光照强度下于自来水中生根75天。光周期为17小时。在生根期的前30天，记录了不同处理插条中碳水化合物的定量变化。插条的碳水化合物含量主要受母株阶段光照强度的调节，一般来说，在以每平方米40瓦光照强度生长的母株上获取的插条中碳水化合物水平较高。生根期的光照强度对生根过程的时间进程影响较小，而母株阶段的光照强度确实会影响后续的生根情况。以每平方米8瓦光照强度生长的母株上获取的插条比以每平方米40瓦光照强度生长的母株上获取的插条生根更快且频率更高。结合上述光照强度对碳水化合物含量的影响对这些结果进行了讨论。
