Carbon dots (CDs) obtained from rapeseed
pollen with a high production
yield, good biocompatibility, good water solubility, low cost, and
simple synthesis are systematically characterized. They can be directly
added to Hoagland nutrient solution for planting hydroponically cultivated Lactuca sativa L. to explore their influence on the
plants at different concentrations. By measuring lettuce indices of
growth, morphology, nutrition quality, gas exchange, and content of
photosynthetic pigment, amazing growth-promotion effects of CDs were
discovered, and the mechanism was analyzed. Moreover, the in vivo
transport route of CDs in lettuce was evaluated by macroscopic and
microscopic observations under UV light excitation. The results demonstrate
that pollen-derived CDs can be potentially used as a miraculous fertilizer
for agricultural applications and as a great in vivo plant bioimaging
probe.
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