MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-Construction By Ministry and Province), College of Agriculture, Yangtze University, Jingzhou, 434025, Hubei, China.
Key Laboratory of Integrated Pest Management of Crops in Central China, Ministry of Agriculture/Hubei Key Laboratory of Crop Diseases, Institute of Plant Protection and Soil Science, Insect Pests and Weeds Control, Hubei Academy of Agricultural Sciences, Wuhan, 430064, Hubei, China.
J Nanobiotechnology. 2023 Jan 3;21(1):2. doi: 10.1186/s12951-022-01753-7.
Silica nanoparticles (SiNPs) have been demonstrated to have beneficial effects on plant growth and development, especially under biotic and abiotic stresses. However, the mechanisms of SiNPs-mediated plant growth strengthening are still unclear, especially under field condition. In this study, we evaluated the effect of SiNPs on the growth and sugar and hormone metabolisms of wheat in the field.
SiNPs increased tillers and elongated internodes by 66.7% and 27.4%, respectively, resulting in a larger biomass. SiNPs can increase the net photosynthetic rate by increasing total chlorophyll contents. We speculated that SiNPs can regulate the growth of leaves and stems, partly by regulating the metabolisms of plant hormones and soluble sugar. Specifically, SiNPs can increase auxin (IAA) and fructose contents, which can promote wheat growth directly or indirectly. Furthermore, SiNPs increased the expression levels of key pathway genes related to soluble sugars (SPS, SUS, and α-glucosidase), chlorophyll (CHLH, CAO, and POR), IAA (TIR1), and abscisic acid (ABA) (PYR/PYL, PP2C, SnRK2, and ABF), whereas the expression levels of genes related to CTKs (IPT) was decreased after SiNPs treatment.
This study shows that SiNPs can promote wheat growth and provides a theoretical foundation for the application of SiNPs in field conditions.
研究表明，硅纳米颗粒（SiNPs）对植物的生长和发育具有有益影响，尤其是在生物和非生物胁迫下。然而，SiNPs 介导的植物生长增强的机制尚不清楚，特别是在田间条件下。在本研究中，我们评估了 SiNPs 对田间小麦生长和糖及激素代谢的影响。
SiNPs 分别使分蘖数和节间伸长增加了 66.7%和 27.4%，从而产生了更大的生物量。SiNPs 通过增加总叶绿素含量来提高净光合速率。我们推测 SiNPs 可以通过调节植物激素和可溶性糖的代谢来调节叶片和茎的生长。具体而言，SiNPs 可以增加生长素（IAA）和果糖含量，从而直接或间接地促进小麦生长。此外，SiNPs 增加了与可溶性糖（SPS、SUS 和α-葡萄糖苷酶）、叶绿素（CHLH、CAO 和 POR）、IAA（TIR1）和脱落酸（ABA）（PYR/PYL、PP2C、SnRK2 和 ABF）相关的关键途径基因的表达水平，而 SiNPs 处理后与细胞分裂素（IPT）相关的基因表达水平降低。
本研究表明 SiNPs 可以促进小麦的生长，为 SiNPs 在田间条件下的应用提供了理论基础。
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