Gohari Gholamreza, Panahirad Sima, Mohammadi Asghar, Kulak Muhittin, Dadpour Mohamad Reza, Lighvan Zohreh Mehri, Sharifi Sina, Eftekhari-Sis Bagher, Szafert Sławomir, Fotopoulos Vasileios, Akbari Ali
Department of Horticultural Sciences, Faculty of Agriculture, University of Maragheh, Maragheh, Iran; Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology Limassol, Cyprus.
Department of Horticultural Sciences, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
Plant Physiol Biochem. 2023 Mar;196:89-102. doi: 10.1016/j.plaphy.2023.01.019. Epub 2023 Jan 12.
Salt stress is of the most detrimental abiotic stress factors on either crop or non-crop species. Of the strategies employed to boost the performance of the plants against harmful impacts of salt stress; application of novel nano-engineered particles have recently gained great attention as a promising tool. Octa-aminopropyl polyhedral oligomeric silsesquioxanes nanoparticles (OA-POSS NPs) were synthesized and then a foliar-application of OA-POSS NPs were carried out on sweet basil plants subjected to the salt stress. In that context, interactive effects of OA-POSS NPs (25, 50 and 100 mg L) and salinity stress (50 and 100 mM NaCl) were assayed by estimating a series of agronomic, physiological, biochemical and analytical parameters. OA-POSS NPs decreased the harmful effects of salinity by increasing photosynthetic pigment content, adjusting chlorophyll fluorescence, and triggering non-enzymatic (phenolic content) and enzymatic antioxidant components. The findings suggested that 25 mg L OA-POSS NPs is the optimum concentration for sweet basil grown under salt stress. Considering the essential oil profile, estragole was the predominant compound with a percentage higher than 50% depending on the treatment. In comparison to the control group, 50 mM NaCl did not significantly affect estragole content, whilst 100 mM NaCl caused a substantial increase in estragole content. Regarding OA-POSS NPs treatments, increments by 16.8%, 11.8% and 17.5% were observed following application with 25, 50 and 100 mg L, respectively. Taken together, the current study provides evidence that POSS NPs can be employed as novel, 'green' growth promoting agents in combating salt stress in sweet basil.
盐胁迫是对作物和非作物物种最具有害影响的非生物胁迫因素之一。在为提高植物抵御盐胁迫有害影响而采用的策略中，应用新型纳米工程颗粒最近作为一种有前景的工具受到了极大关注。合成了八氨基丙基多面体低聚倍半硅氧烷纳米颗粒（OA-POSS NPs），然后对遭受盐胁迫的甜罗勒植株进行了OA-POSS NPs的叶面喷施。在此背景下，通过评估一系列农艺、生理、生化和分析参数，测定了OA-POSS NPs（25、50和100 mg/L）与盐胁迫（50和100 mM NaCl）的交互作用。OA-POSS NPs通过增加光合色素含量、调节叶绿素荧光以及触发非酶促（酚类含量）和酶促抗氧化成分，降低了盐度的有害影响。研究结果表明，25 mg/L的OA-POSS NPs是盐胁迫下甜罗勒生长的最佳浓度。考虑到精油成分，根据处理方式的不同，草蒿脑是主要成分，其含量高于50%。与对照组相比，50 mM NaCl对草蒿脑含量没有显著影响，而100 mM NaCl导致草蒿脑含量大幅增加。关于OA-POSS NPs处理，分别施用25、50和100 mg/L后，草蒿脑含量分别增加了16.8%、11.8%和17.5%。综上所述，本研究提供了证据表明POSS NPs可作为新型“绿色”生长促进剂用于对抗甜罗勒的盐胁迫。
