Salehi Hajar, Cheheregani Rad Abdolkarim, Raza Ali, Djalovic Ivica, Prasad P V Vara
Laboratory of Plant Cell Biology, Department of Biology, Bu-Ali Sina University, Hamedan, Iran.
College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China.
Front Plant Sci. 2023 Jan 19;13:1098772. doi: 10.3389/fpls.2022.1098772. eCollection 2022.
The world has experienced an unprecedented boom in nanotechnology. Nanoparticles (NPs) are likely to act as biostimulants in various plants due to having high surface/volume value. However, understanding the actual effect of NPs is essential to discriminate them from other counterparts in terms of being applicable, safe and cost-effective. This study aimed to assay the impact of manganese(III) oxide (MnO)-NPs seed-priming (SP) and a combination of SP and foliar application (SP+F) on performance at several times intervals and comparison with other available manganese (Mn) forms. Our findings indicate that SP with MnSO and MnO-NPs stimulates the processes that occur prior to germination and thus reduces the time for radicle emergence. In both applications (i.e., SP and +F), none of the Mn treatments did show adverse phytotoxic on growth at morpho-physio and biochemical levels except for MnO which delayed germination and further plant growth, subsequently. Besides, from physio-biochemical data, it can be inferred that the general mechanism mode of action of Mn is mainly attributed to induce the photosynthetic processes, stimulate the superoxide dismutase (SOD) activity, and up-regulation of proline and phenolic compounds. Therefore, our results showed that both enzymatic and non-enzymatic antioxidants could be influenced by the application of Mn treatments in a type-dependent manner. In general, this study revealed that MnO-NPs at the tested condition could be used as biostimulants to improve germination, seedling development and further plant growth. However, they are not as effective as MnSO treatments. Nonetheless, these findings can be used to consider and develop MnO-NPs priming in future studies to improve seed germination and seedling quality in plants.
世界经历了纳米技术前所未有的蓬勃发展。由于具有高表面/体积比，纳米颗粒（NPs）可能在各种植物中充当生物刺激剂。然而，了解NPs的实际效果对于在适用性、安全性和成本效益方面将它们与其他同类物质区分开来至关重要。本研究旨在测定氧化锰（MnO）-NPs种子引发（SP）以及SP与叶面喷施相结合（SP+F）在几个时间间隔对植物性能的影响，并与其他可用的锰（Mn）形式进行比较。我们的研究结果表明，用硫酸锰和MnO-NPs进行种子引发可刺激发芽前发生的过程，从而减少胚根出现的时间。在两种施用方式（即SP和+F）中，除了MnO延迟发芽和随后的植物生长外，没有一种Mn处理在形态生理和生化水平上对植物生长表现出不利的植物毒性。此外，从生理生化数据可以推断，Mn的一般作用机制模式主要归因于诱导光合作用过程、刺激超氧化物歧化酶（SOD）活性以及脯氨酸和酚类化合物的上调。因此，我们的结果表明，酶促和非酶促抗氧化剂都可能以类型依赖的方式受到Mn处理施用的影响。总体而言，本研究表明，在测试条件下MnO-NPs可用作生物刺激剂，以改善发芽、幼苗发育和进一步的植物生长。然而，它们不如硫酸锰处理有效。尽管如此，这些发现可用于在未来的研究中考虑和开发MnO-NPs引发，以提高植物种子的发芽率和幼苗质量。
