Physiological Responses of Cucumber Seedlings to Different Supplemental Light Duration of Red and Blue LED

• DOI: 10.3389/fpls.2021.709313
• Publication Date: 2021-07-12T07:23:55Z
• Authors: Shuya Wang; Hua Fang; Jianming Xie; Yue Wu; Zhongqi Tang; Zeci Liu; Jian Lv; Jihua Yu
• Keywords: Phytochrome; Far-red

Normal development of plants is inhibited by inadequate light in winter greenhouses Northwest China. Growth lamps, using light-emitting diodes (LEDs) with red blue (7R2B), were used to supplement daylight for 1, 2, and 3 h. Seedling growth, photosynthesis, photosynthetic product; the Calvin cycle key sugar metabolism-related enzymes their encoding genes; signal sensing regulation gene expression studied greenhouse cucumbers under three treatments determine best supplemental durations enhance cucumber cultivation winter. Treatment LED h significantly promoted growth cucumbers, root dry matter accumulation. It improved rate, pigment content, energy utilization efficiency cucumbers. Supplementation upregulated levels genes related metabolism leaves, which synthesis accumulation photosynthates. The phytochrome B, cryptochrome hypocotyl 5 leaves also after supplementation. Combined should be natural