Department of Botany, Government College University Lahore, Pakistan.
Institute of Molecular Biology and Biotechnology, The University of Lahore, 54590, Lahore, Pakistan.
Plant Physiol Biochem. 2023 Aug;201:107830. doi: 10.1016/j.plaphy.2023.107830. Epub 2023 Jun 10.
Soils deficient in essential micro-nutrients produce nutritionally starved crops that do not fulfill human nutritional requirements. This is getting serious since progressively increasing nutritional disorders are being diagnosed in residents of third-world countries like Pakistan. During this study, we synthesized a spinel nanocomposite (nMnZnFeO) and investigated its effectiveness in improving the micronutrient status and yield traits of rice. The nMnZnFeO exhibited a cubic structure at the most prominent peak (311); a crystallite size of 44 nm, and an average grain size ranging from 7 to 9 μm. Foliar application of this nanocomposite was performed to 45 days old plants at concentrations 0, 10, 20, 30, 40, and 50 mg L and data from rice plant parts (straw, husk, and grain) was recorded at maturity. Agronomic traits like the number of tillers, straw dry weight, root dry biomass, and grain yield per plant were improved by nMnZnFeO application (+34.4% yield). Whereas some biochemical traits like amino acids, soluble sugars, flavonoids, and phenolics varied significantly in rice plant parts compared to the control. Above all, the maximum Zn and Fe concentrations in rice grain were recorded through foliar application of spinel nanocomposite (40 and 50 mg L). Therefore, results indicated that micronutrient supply in the form of a nanocomposite could positively regulate nutritional quality and rice grain yield.
土壤中缺乏必需的微量营养素会导致营养不足的作物生长，无法满足人类的营养需求。这种情况越来越严重，因为在巴基斯坦等第三世界国家的居民中，越来越多的营养失调症被诊断出来。在这项研究中，我们合成了一种尖晶石纳米复合材料（nMnZnFeO），并研究了它在改善水稻微量元素状况和产量特性方面的有效性。nMnZnFeO 在最显著的峰（311）处表现出立方结构；结晶粒度为 44nm，平均晶粒尺寸在 7 到 9μm 之间。在 45 天大的植株上进行叶面喷施，浓度为 0、10、20、30、40 和 50mg/L，并在成熟时记录水稻植株各部分（秸秆、壳和谷物）的数据。通过 nMnZnFeO 的应用，提高了农艺性状，如分蘖数、秸秆干重、根干生物量和每株植物的籽粒产量（产量提高 34.4%）。然而，与对照相比，一些生化特性，如氨基酸、可溶性糖、类黄酮和酚类，在水稻植株各部分中差异显著。最重要的是，通过叶面喷施尖晶石纳米复合材料，水稻籽粒中的最大锌和铁浓度（40 和 50mg/L）被记录下来。因此，结果表明，以纳米复合材料形式提供的微量元素可以积极调节营养质量和水稻籽粒产量。
