荧光 g-CN 纳米片提高了玉米的光合作用效率。
Fluorescent g-CN nanosheets enhanced photosynthetic efficiency in maize.
机构信息
Institute of Environmental Processes and Pollution Control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China.
Institute of Environmental Processes and Pollution Control, and School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi, Jiangsu 214122, China.
出版信息
NanoImpact. 2021 Oct;24:100363. doi: 10.1016/j.impact.2021.100363. Epub 2021 Nov 12.
Nano-enabled agriculture becomes a new and rapidly evolving area of research, particularly, nanomaterials (NMs) with light-harvesting capacities for enhancing photosynthesis. However, mechanisms for the interactions between these NMs and plants are not fully understood. Herein, fluorescent and water-soluble graphitic carbon nitride (g-CN) nanosheets were prepared and used as artificial antenna to amplify light harvesting ability and enhance photosynthesis in maize. Upon root exposure to 10 mg·L g-CN nanosheets, the g-CN can be taken up and distributed in leaves. Also, the nutrients (Mg, P, Fe, and Mn), chlorophyll content, electron transfer rate, net photosynthetic rate, and carbohydrates content in maize were increased significantly by 1.1%, 51.8%, 44.6%, 121.8%, 12.1%, 44.5%, 30.0% and 32.3%, respectively. In addition, the gene expressions of psbA (photosystem II reaction center protein A) and psaA (photosystem I P700 chlorophyll A apoprotein A1) were up-regulated by 56.3% and 26.8%, respectively. Moreover, the activities of phosphoenolpyruvate carboxylase (PEPC) and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) were significantly increased by 242.3% and 156.3%, respectively. This study provides a new perspective on the use of g-CN nanosheets to promote plant growth and develop nano-enabled agricultural technology.
纳米农业成为一个新的快速发展的研究领域，特别是具有光捕获能力的纳米材料，可增强光合作用。然而，这些纳米材料与植物之间的相互作用机制尚未完全了解。在此，制备了具有荧光和水溶性的石墨相氮化碳（g-CN）纳米片，并将其用作人工天线，以放大光捕获能力并增强玉米的光合作用。当根部暴露于 10 mg·L 的 g-CN 纳米片时，g-CN 可以被吸收并分布在叶片中。此外，g-CN 纳米片处理使玉米中的营养物质（Mg、P、Fe 和 Mn）、叶绿素含量、电子转移率、净光合速率和碳水化合物含量分别显著增加了 1.1%、51.8%、44.6%、121.8%、12.1%、44.5%、30.0%和 32.3%。此外，psbA（光系统 II 反应中心蛋白 A）和 psaA（光系统 I P700 叶绿素 A 脱辅基蛋白 A1）的基因表达分别上调了 56.3%和 26.8%。此外，磷酸烯醇丙酮酸羧化酶（PEPC）和核酮糖-1,5-二磷酸羧化酶/加氧酶（Rubisco）的活性分别显著增加了 242.3%和 156.3%。本研究为利用 g-CN 纳米片促进植物生长和开发纳米农业技术提供了新的视角。
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