Division of Animal, Horticultural and Food Science, Chungbuk National University, Cheongju 28644, Republic of Korea; Brain Korea 21 Center for Bio-Health Industry, Chungbuk National University, Cheongju 28644, Republic of Korea.
Division of Animal, Horticultural and Food Science, Chungbuk National University, Cheongju 28644, Republic of Korea; Brain Korea 21 Center for Bio-Health Industry, Chungbuk National University, Cheongju 28644, Republic of Korea.
Bioelectrochemistry. 2021 Apr;138:107727. doi: 10.1016/j.bioelechem.2020.107727. Epub 2020 Dec 21.
Several studies have demonstrated that electric treatment has a positive effect, respectively, on germination, root growth and post-harvest quality. Nevertheless, there is still a lack of research on the effect of electric treatment on growth characteristics and quality of whole plants. Here, we explored the effect of electric fields on two cultivars of kale (Brassica oleracea var. acephala). Three levels of electric current (10, 50, and 100 mA) were applied to the nutrient solution of hydroponically grown plants for three weeks. Kale plants subjected to the electric fields, particularly 50 mA, had higher fresh and dry weights than the control. The absence of an electric field in a Faraday cage caused a significant decrease in shoot and root growth compared with the natural electric field (control). Electrostimulation enhanced nutrient uptake by activating root hair formation and active ion transport. Plants grown under 50 mA contained 72% more calcium, 57% more total phenolic compounds, and had a 70% greater antioxidant capacity than the control. This work provides foundational information regarding the effects of electrical stimulus on plants, which could enable the development of innovative culture technologies to improve crop yields and quality.
多项研究表明，电处理分别对发芽、根生长和采后质量有积极影响。然而，关于电处理对整株植物生长特性和品质的影响，仍缺乏研究。在这里，我们探讨了电场对两种羽衣甘蓝（Brassica oleracea var. acephala）品种的影响。将三个电流水平（10、50 和 100 mA）施加到水培植物的营养液中 3 周。与对照相比，经受电场处理的羽衣甘蓝，特别是 50 mA 的处理，其鲜重和干重更高。在法拉第笼中没有电场会导致与自然电场（对照）相比，芽和根生长显著减少。电刺激通过激活根毛形成和主动离子转运来增强养分吸收。与对照相比，在 50 mA 下生长的植物含有 72%更多的钙、57%更多的总酚化合物，并且具有 70%更大的抗氧化能力。这项工作提供了关于电刺激对植物影响的基础信息，这可能为开发创新的栽培技术以提高作物产量和品质提供依据。
