Cheng Bingxu, Yang Zhilin, Chen Feiran, Yue Le, Cao Xuesong, Li Jing, Qian Hai-Long, Yan Xiu-Ping, Wang Chuanxi, Wang Zhenyu
Institute of Environmental Processes and Pollution Control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China.
School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
Sci Total Environ. 2023 Nov 25;901:165973. doi: 10.1016/j.scitotenv.2023.165973. Epub 2023 Aug 1.
Carbon dots (CDs)-enabled agriculture has been developing rapidly, but small-scale synthesis and high costs hinder the agricultural application of CDs. Herein, biomass-derived carbon dots (B-CDs) were prepared on a gram-level with low cost, and these B-CDs significantly improved crop photosynthesis. The B-CDs, exhibiting small size and blue fluorescence, were absorbed by crops and enhanced photosynthesis via light-harvesting. Foliar application of B-CDs (10 mg·kg) could promote chlorophyll synthesis (30-100 %), Ferredoxin (Fd, 40-80 %), Rubisco enzyme (20-110 %) and upregulated gene expression (20-70 %), resulting in higher net photosynthetic rates (130-300 %), dry biomass (160-300 %) and fresh biomass (80-150 %). Further, the B-CDs could increase crop photosynthesis under nutrient deficient conditions, which was attributed to the release of nutrients from B-CDs. Therefore, the B-CDs enhanced the photosynthesis via enhancing light conversion and nutrient supply. This study provides a promising material capable of enhancing photosynthesis for sustainable agriculture production.
基于碳点（CDs）的农业发展迅速，但小规模合成和高成本阻碍了碳点在农业中的应用。在此，以低成本制备了克级生物质衍生碳点（B-CDs），这些B-CDs显著改善了作物光合作用。B-CDs尺寸小且具有蓝色荧光，被作物吸收并通过光捕获增强光合作用。叶面喷施B-CDs（10 mg·kg）可促进叶绿素合成（30-100%）、铁氧还蛋白（Fd，40-80%）、核酮糖-1,5-二磷酸羧化酶（Rubisco酶，20-110%）并上调基因表达（20-70%），从而提高净光合速率（130-300%）、干生物量（160-300%）和鲜生物量（80-150%）。此外，B-CDs可在养分缺乏条件下提高作物光合作用，这归因于B-CDs中养分的释放。因此，B-CDs通过增强光转化和养分供应来增强光合作用。本研究提供了一种有前景的材料，能够增强光合作用以实现可持续农业生产。
