PJB-2022-425
CERIUM NITROGEN CO-DOPED CARBON DOTS PROMOTE ROOT GROWTH OF ARABIDOPSIS THALIANA VIA AUXIN SYNTHESIS AND TRANSPORT
TING MU
Abstract
Cerium–Nitrogen co–doped carbon quantum dots (Ce-N-CDs), a novel type of carbon-based nanomaterials, are prepared using hydrothermal synthesis. Ce-N-CDs demonstrate low toxicity, stability, and satisfactory biocompatibility. Effects of Ce-N-CDs on Arabidopsis root growth were analyzed at the molecular and physiological levels in this work. Ce-N-CDs (0.04 mg/mL) promoted the root tip meristem (RAM) and primary root (PR) growth. Ce-N-CDs effectively regulated the genes expression associated with cell cycle and facilitate the RAM and PR growth by enhancing cell division capacity of the RAM and activity of stem cells niche. The expression of auxin synthesis genes was upregulated after treatment with Ce-N-CDs, and the increased abundance of auxin transporters PIN1, PIN2, and PIN7 led to the increased accumulation of auxin and promotion of root growth. Thus, Ce-N-CDs can potentially promote plant growth and bioimaging.
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