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Biomimetic Preparation of Silicon Quantum Dots and Its Phytophysiology Effect on Cucumber Seedling

Abstract

In this study, a biomimetic synthetic strategy was proposed to facile produce red fluorescent silicon quantum dots (SiQDs) using unicellular algae of diatom as reaction precursor. The resultant SiQDs of ~2.0 nm diameter display a remarked red luminescence with nontoxicity, high quantum yield (~15%) and narrow full width at half maximum (FWHM, ~35 nm). Specifically, the as-prepared SiQDs have shown promise as a regulator of plant growth. After cultivating cucumber seedling with SiQDs, the growth of cucumber seedlings has been significant promoted within a wide range of concentration (0.01-0.3 mg/mL). The total fresh weight of cucumber seedlings significant increased by 51.91% (P<0.001) compared with control group after incubation of 10 days. Moreover, it was discovered that the growth of cucumber seedlings is positively correlated with water uptake rate of roots. After incubation of 5 days, the concentration for the optimum significantly increased water uptake rate of roots by 74.6% compared with control group. The real-time fluorescence quantitative polymerase chain reaction (RT-PCR) analysis revealed that the expression of aquaporin gene in cucumber roots treated with SiQDs was increased significantly compared to control group. This is the first time to report on the phytophysiology effect of red fluorescent SiQDs on cucumber seedlings growth. The results enlarge the applications of SiQDs in plant science.

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Publication details

The article was received on 12 Nov 2018, accepted on 14 Jan 2019 and first published on 14 Jan 2019


Article type: Paper
DOI: 10.1039/C8TB02981D
Citation: J. Mater. Chem. B, 2019, Accepted Manuscript
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    Biomimetic Preparation of Silicon Quantum Dots and Its Phytophysiology Effect on Cucumber Seedling

    Y. Li, W. Li, H. Zhang, R. Dong, D. Li, Y. Liu, L. Huang and B. Lei, J. Mater. Chem. B, 2019, Accepted Manuscript , DOI: 10.1039/C8TB02981D

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