In agriculture, LED light sources have increasingly replaced the standard luminescent lamps and have acquired an important role in plant micropropagation. We studied the effect of different light sources such as narrow-band LEDs (bright blue, blue, green, yellow, deep red, and red) and wide-band LEDs (cold white, white, warm white, full spectrum, and an artificial solar spectrum sun box constructed by us) on development of potato plantlets in vitro. White luminescent lamps were used as a control. The light intensity of 49 µmol · m⁻² · s⁻¹ was provided in all light treatments. We showed that the long-wave narrow-band light treatments were inapplicable for potato micropropagation, because plantlets were weak with small leaves, inhibited roots, and significantly elongated stems. Blue lights provided growth of shortened plantlets with large leaves, well-growing roots, and abundant green mass. The chlorophyll content was lower under blue and bright blue light and was at the same level in the remained treatments. Significant differences in the stomatal apparatus development were observed depending on the light source. These differences were not always reflected in the plantlet phenotype: e.g., plantlets under blue and bright blue lights showed no differences in any characteristics except stomatal density and size of stomatal guard cells. We found no significant effect of blue light portion in the white lights and full spectrum on plantlet growth. An artificial solar spectrum sun box was the most suitable for potato micropropagation, because it supported the development of plantlets with good fitness, uniform internodes length, abundant roots and green mass accumulation.

在农业领域，LED 光源越来越多地取代了标准的荧光灯，并在植物微繁中发挥了重要作用。我们研究了不同光源的效果，例如窄带 LED（亮蓝色、蓝色、绿色、黄色、深红色和红色）和宽带 LED（冷白、白、暖白、全光谱和人造我们建造的太阳光谱太阳箱）关于马铃薯离体幼苗发育的研究。白色荧光灯用作对照。光强 49 µmol·m ^-2  · s ^-1在所有光治疗中都提供。我们表明，长波窄带光处理不适用于马铃薯微繁，因为植株弱，叶片小，根部受到抑制，茎部显着拉长。蓝光提供了具有大叶子、生长良好的根和丰富的绿色物质的短小植物的生长。在蓝光和亮蓝光下叶绿素含量较低，其余处理均处于相同水平。根据光源观察到气孔器发育的显着差异。这些差异并不总是反映在植物的表型中：例如，在蓝色和亮蓝色光下的植物除了气孔密度和气孔保卫细胞的大小外，在任何特征上都没有差异。我们发现白光和全光谱中的蓝光部分对植物生长没有显着影响。人工太阳光谱太阳箱最适合马铃薯微繁，因为它支持小苗的发育，适应性好，节间长度均匀，根系丰富，绿色物质积累。