School of Life Sciences, Shanxi Datong University, Datong, 037009, China.
Institute of Carbon Materials Science, Shanxi Datong University, Datong, 037009, China.
Plant Physiol Biochem. 2021 May;162:447-455. doi: 10.1016/j.plaphy.2021.03.013. Epub 2021 Mar 12.
The nano-carbon graphene has unique structural and physicochemical properties, which are conducive to various biomedical applications. We assessed the effect of graphene oxide (GO) on tomato plants at the seedling and mature stages in terms of morphological and biochemical indices. GO treatment significantly improved the shoot/stem growth of tomato in a dose-dependent manner by increasing the cortical cells number, cross-sectional area, diameter and vascular-column area. In addition, GO also promoted the morphological development of the root system and increased biomass accumulation. The surface area of root tips and hairs of tomato plants treated with 50 mg/L and 100 mg/L GO were significantly greater compared to the untreated control. At the molecular level, GO induced the expression of root development-related genes (SlExt1 and LeCTR1) and inhibited the auxin-responsive gene (SlIAA3). However, 50 mg/L and 100 mg/L GO significantly increased the root auxin content, which in turn increased the number of fruits and hastened fruit ripening compared to the control plants. Taken together, GO can improve the tomato growth when used at the appropriate concentration, and is a promising nano-carbon material for agricultural use.
纳米碳石墨烯具有独特的结构和物理化学性质，有利于各种生物医学应用。我们评估了氧化石墨烯（GO）在幼苗和成熟阶段对番茄植株在形态和生化指标方面的影响。GO 处理以剂量依赖的方式显著改善了番茄的芽/茎生长，增加了皮层细胞数量、横截面积、直径和维管束面积。此外，GO 还促进了根系的形态发育，增加了生物量积累。与未处理的对照相比，用 50mg/L 和 100mg/L GO 处理的番茄植株根尖和根毛的表面积显著增大。在分子水平上，GO 诱导了与根发育相关的基因（SlExt1 和 LeCTR1）的表达，并抑制了生长素反应基因（SlIAA3）。然而，50mg/L 和 100mg/L GO 显著增加了根中的生长素含量，这反过来又增加了果实数量并加速了果实成熟，与对照植物相比。综上所述，在适当的浓度下，GO 可以改善番茄的生长，是一种有前途的农用纳米碳材料。
