Nano-silica/polymer composites increase the growth and development of Poa pratensis, Festuca arundinacea, F. rubra and Lolium perenne in sandy soil by facilitating the uptake of silica nanoparticles into cells
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Abstract
Background and aims
A nano-silica/polymer composite (NSPC) was developed as an environmentally friendly agent and applied as a sustainable sand-fixing material. This study aimed to investigate the effects of the NSPC curing agent on enhancing the growth of plants in sandy soil and the role of silicon (Si) in plant metabolism.
Methods
Four different grasses (Poa pratensis, Festuca arundinacea, F. rubra and Lolium perenne) were grown in a monoculture pot experiment in a controlled growth chamber at 3 °C with a 12 h photoperiod. After the addition of NSPC to sandy soil, grass seeds were allowed to grow for 60 days. The changes in the total chlorophyll (Chl a + b) and carotenoid (Car) contents and the amount of Si, defined as the total silica, in grasses at different growth stages were determined. Seedling growth was measured manually by using measuring tape or handheld instruments such as Vernier callipers. The uptake and translocation of silica nanoparticles in the grass plants were investigated by transmission electron microscopy.
Results
The results revealed that, compared with the control, NSPC treatment positively affected the seedling growth and Chl and Car contents of the grass. Furthermore, NSPC significantly promoted photosynthesis and increased the Si content of grass in sandy soil by facilitating the uptake of silica nanoparticles into cells.
Conclusion
NSPC application to sandy soil improved the morphophysiological and biochemical responses of grass plants, leading to improved grass yield potential. This effect was attributed to the increased photosynthetic efficiency mediated by the cellular uptake of silica nanoparticles.
期刊介绍：
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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