Tan Jieqiang, Zhao Shili, Chen Junyu, Pan Xiaoqin, Li Chen, Liu Yingliang, Wu Caijuan, Li Wei, Zheng Mingtao
Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.
Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming 525100, China.
J Mater Chem B. 2023 Apr 5;11(14):3113-3123. doi: 10.1039/d2tb02817d.
Nanotechnology is an effective way to stimulate the yield potential of crops. Various nano-fertilizers and nano-carriers are gradually being developed to bring about a technological revolution in the agricultural industry. As a biocompatible water-soluble nanomaterial, carbon dots (CDs) have attracted the attention of researchers for applications in agriculture. In this study, we prepared nitrogen-doped CDs (N-CDs) as a type of water-soluble carbon nanofertilizer by a one-pot hydrothermal method, and investigated its effects on lettuce biomass and quality. 100 and 200 mg L of N-CDs substantially promoted lettuce biomass accumulation (41.70%), elevated lettuce nutrient content, as well as promoted the accumulation of major nutrients. Moreover, 100 mg L N-CDs increased the chlorophyll content by 12.68%, significantly increased the electron transport rate (ETR) by 38.61%, significantly increased the light energy conversion efficiency (Y(II)) by 31.24% and increased the Rubisco activity by 60.61%, which are important reasons for its increase in actual photosynthesis rate. N-CDs also have a positive effect on plant nitrogen metabolism by promoting the activity of glutamine synthetase. The significant benefits of N-CDs on lettuce make them have great potential for agricultural yield increase and quality improvement.
纳米技术是提高作物产量潜力的有效途径。各种纳米肥料和纳米载体正在逐步开发，以给农业产业带来一场技术革命。作为一种生物相容性水溶性纳米材料，碳点（CDs）在农业应用方面已引起研究人员的关注。在本研究中，我们通过一锅水热法制备了氮掺杂碳点（N-CDs）作为一种水溶性碳纳米肥料，并研究了其对生菜生物量和品质的影响。100和200 mg/L的N-CDs显著促进了生菜生物量的积累（41.70%），提高了生菜的营养成分含量，并促进了主要养分的积累。此外，100 mg/L的N-CDs使叶绿素含量增加了12.68%，显著提高了电子传递速率（ETR）38.61%，显著提高了光能转换效率（Y(II)）31.24%，并使核酮糖-1,5-二磷酸羧化酶（Rubisco）活性提高了60.61%，这些都是其实际光合速率提高的重要原因。N-CDs还通过促进谷氨酰胺合成酶的活性对植物氮代谢产生积极影响。N-CDs对生菜的显著益处使其在提高农业产量和改善品质方面具有巨大潜力。
