Agro-Nanotechnology and Advanced Materials Research Center, Department of Food Science, Agricultural Research Organization, The Volcani Institute, P.O.B 15159, Rishon Lezion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.
Agro-Nanotechnology and Advanced Materials Research Center, Department of Food Science, Agricultural Research Organization, The Volcani Institute, P.O.B 15159, Rishon Lezion 7505101, Israel.
Colloids Surf B Biointerfaces. 2021 Nov;207:112032. doi: 10.1016/j.colsurfb.2021.112032. Epub 2021 Aug 11.
The increasing need for agricultural production on the one hand, and requirements for greener and more sustainable agricultural practices on the other, have led to a growing demand for efficient and eco-friendly materials for the delivery of agrochemicals. Here we describe, the use of layered double hydroxide (LDH) particles as a carrier for a plant hormone. Magnesium-aluminum LDH intercalated with indole-3-acetic acid (IAA) was synthesized by co-precipitation method, characterized, and examined for real-life applications. Scanning electron microscopy revealed that both pristine and IAA-intercalated LDH particles exhibit hexagonal platelet morphology. X-ray diffraction showed a hydrotalcite-like structure and, together with Fourier transform infrared spectroscopy, verified the efficacious intercalation of IAA anions. The intercalation protected the IAA from enzymatic degradation and allowed its sustained release, as demonstrated by enzymatic stability and release tests, correspondingly. In-vivo assay revealed that intercalation inside LDH significantly increases the biological activity of IAA in promoting adventitious root development in plant cuttings. Results demonstrate the applicability of LDH as an advanced, effective, and sustainable carrier that overcomes the practical limitations of agrochemicals and significantly enhances their efficiency.
一方面，农业生产的需求不断增加，另一方面，对绿色和更可持续的农业实践的要求也在不断提高，这导致人们对用于输送农用化学品的高效、环保材料的需求日益增长。在这里，我们描述了将层状双氢氧化物 (LDH) 颗粒用作植物激素载体的用途。通过共沉淀法合成了插层有吲哚-3-乙酸（IAA）的镁铝 LDH，并对其进行了表征，同时考察了其在实际应用中的性能。扫描电子显微镜显示，原始和 IAA 插层 LDH 颗粒均呈现出六方板状形态。X 射线衍射显示出水滑石样结构，与傅里叶变换红外光谱一起，验证了 IAA 阴离子的有效插层。插层保护 IAA 免受酶降解，并允许其持续释放，这一点通过酶稳定性和释放测试得到了证实。体内试验表明，插层在 LDH 内部显著提高了 IAA 的生物活性，促进了植物插条不定根的发育。结果表明，LDH 作为一种先进、有效和可持续的载体具有适用性，克服了农用化学品的实际局限性，并显著提高了其效率。
