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目的研究红蓝单色光对植物生长的影响,探索其作为植物生长光源的可行性。方法采用白、红和蓝发光二极管的光照条件培养油麦菜,分析和比较油麦菜植株在不同光质下的生长状态、生理特性和养分含量的差异。结果红光促进油麦菜茎叶径向生长,蓝光利于其茎叶横向生长和光合色素合成;油麦菜在全红光下不能正常生长,5%20%蓝光比例能提高其光合和蒸腾速率、光合色素含量、生物量和大量元素含量,改善其荧光特性。25%50%蓝光比例使光合色素含量进一步增加,但地上生物量明显下降,根冠比显著增加;红蓝单色光增加了单位面积或功率的生物产量。结论红蓝发光二极管可用于培养油麦菜,且蓝光比例为10%的光照条件最有利于油麦菜生长。
Abstract：Objective To investigate the characteristics of higher plant grown in red and/or blue light and test the capability of red and/or blue light emitting diodes(LEDs) used as the artificial lights for plant growth in controlled ecological life support system(CELSS).Methods Lettuce(Lactuca sativa var.Youmaicai) was cultivated in sole white LED,sole red LED and combined red and blue LEDs,respectively.Its growing status,physiological characteristics and the content of nutrients were evaluated,which were adopted to select the best combination of red and blue LED for plant growth.Results Red light promoted the radial growth of lettuce plants,and blue light was propitious to their transverse extension and synthesis of chlorophyll and carotenoid;lettuce plants couldn't grow normally in sole red light;with the gradual increase of blue light proportion(5%20%),there were some active effects on the growth of lettuce plants,for instance,the improvement of photosynthesis,transpiration and fluorescence(Fo,Fv/Fm and qN),the increasing of contents of chlorophyll,carotenoid and nutrients and the enhancement of total biomass;the adverse effects of blue LED on the growing of lettuce plants appeared gradually with the addition of blue light(25%50%).Its biomass of shoot decreased significantly,which induced the increase of the ratio of root/shoot.Conclusion The combined red and blue LEDs is propitious to lettuce(var.Youmaicai) growth and the best lighting condition is the combined 90% red and 10% blue light.
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基本信息:
DOI：10.16289/j.cnki.1002-0837.2010.03.001
中图分类号:S636.2
引用信息:
[1]唐永康,郭双生,艾为党等.不同比例红蓝LED光照对油麦菜生长发育的影响[J].航天医学与医学工程,2010,23(03):206-212.DOI:10.16289/j.cnki.1002-0837.2010.03.001.
基金信息:
“863”基金资助(2008AA12A219)