PDF(Pubmed)
Abstract：
Agriculture has a significant environmental impact and is simultaneously called to major challenges, such as responding to the need to develop more sustainable cropping systems with higher productivity. In this context, the present study aimed to obtain lignin nanoparticles (LNs) from pomace, a waste product of the olive oil chain, to be used as a nanobiostimulant in tomato plants. The biostimulant effect of this biopolymer is known, but its reduction to nanometer size can emphasize this property. Tomato plants were subjected to different LN dosages (25, 50, and 100 mg L-1) by foliar application, and inductive effects on photosynthetic machinery, aerial and root biomass production, and root morphology were observed. The treated plants showed increased efficiency in catching and using light, while they reduced the fraction dissipated as heat or potentially toxic to cells for the possibility of creating reactive oxygen species (ROS). Finally, this benefit was matched by increased pigment content and a stimulatory action on the content of nitrogen (NBI) and antioxidant substances such as flavonoids. In conclusion, the present study broadens the horizon of substances with biostimulant action by demonstrating the validity and efficacy of nanobiostimulants obtained from biological residues from the olive oil production chain.
摘要：
农业具有重大的环境影响，同时也面临着重大挑战，例如应对发展具有更高生产力的更可持续种植系统的需求。在这种情况下，本研究旨在从果渣中获得木质素纳米颗粒(LNs)，橄榄油链的废品，用作番茄植物中的纳米生物刺激剂。这种生物聚合物的生物刺激作用是已知的，但它缩小到纳米尺寸可以强调这一性质。番茄植物通过叶面施用不同的LN剂量（25、50和100mgL-1），和对光合机械的诱导效应，空中和根系生物量生产，观察根系形态。处理过的植物在捕获和利用光方面表现出更高的效率，同时它们减少了作为热量或对细胞有潜在毒性的部分，以产生活性氧（ROS）。最后,这种益处与增加的色素含量和对氮含量（NBI）和抗氧化物质如类黄酮的刺激作用相匹配。总之,本研究通过证明从橄榄油生产链的生物残留物中获得的纳米生物刺激剂的有效性和功效，拓宽了具有生物刺激剂作用的物质的视野。
