Definition of the growth and development characteristics of plants in varied light conditions is a key factor for the creation of highly efficient light facilities for plant cultivation. Experimental research was conducted using an LED irradiation facility with photosynthetic photon flux densities ranging from 0 to 261 μmol m−2 s−1 and a continuous spectrum with maxima at 445 and 600 nm. Under the maximum photosynthetic photon flux density (261 μmol m−2 s−1) wheat germs demonstrated diminishing leaf surface with high values of specific leaf area, enhanced pubescence of ground tissues, increases in the number of stomata on the upper epidermis and palisade, and an increase in the thickness of the leaves as well as an increase in carotenoids but a decrease in the chlorophyll a+b/carotenoids relation. It was revealed that the optimum level of photosynthetic photon flux density for the referred spectrum was in the range from 82 to 100 µmol m−2 s−1, which may enable a reduction of irradiance under specific conditions during early development with no harm to the plants while minimizing energy consumption during cultivation.

中文翻译：

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不同强度 LED 照射下小麦芽的光形态发生

确定植物在不同光照条件下的生长发育特征是创建高效植物栽培光照设施的关键因素。使用 LED 辐照设备进行实验研究，光合光子通量密度范围为 0 到 261 μmol m-2 s-1，连续光谱在 445 和 600 nm 处具有最大值。在最大光合光子通量密度（261 μmol m−2 s−1）下，小麦胚芽表现出叶面积缩小，比叶面积值高，地面组织的短柔毛增强，上表皮和栅栏上的气孔数量增加，叶片厚度增加，类胡萝卜素增加，但叶绿素 a+b/类胡萝卜素关系降低。