Jiménez-Arias David, Bonardd Sebastian, Morales-Sierra Sarai, Almeida Pinheiro de Carvalho Miguel Â, Díaz Díaz David
ISOPlexis, Center for Sustainable Agriculture and Food Technology, Madeira University, Campus Universitário da Penteada, 9020-105 Funchal, Madeira, Portugal.
Departamento de Química Orgánica, Universidad de la Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain.
J Agric Food Chem. 2023 Feb 9;71(7):3192-200. doi: 10.1021/acs.jafc.2c07927.
Biostimulants are an interesting strategy to increase crop tolerance to water deficits, and there is an extensive bibliography on them. However, most of them need to be treated continuously to increase protection throughout the growth cycle. In this context, we chose menadione sodium bisulfite, whose protective effect against water deficit has been previously demonstrated but only for a short period of time. Nanoencapsulation seems to be an interesting way to improve the properties of biostimulants. Our results show that menadione sodium bisulfite (MSB) encapsulated in chitosan/tripolyphosphate nanoparticles can increase the system's tolerance against an imposed water deficit and delay the need for retreatment by at least 1 week, accelerating plant recovery after rehydration. This highlights the positive properties of nanoencapsulation and shows how a simple encapsulation process can significantly improve the biostimulant protective properties, opening up new possibilities to be explored under field conditions to cope with water-deficit stress.
生物刺激剂是提高作物对水分亏缺耐受性的一种有趣策略，关于它们有大量的文献资料。然而，它们中的大多数需要持续处理才能在整个生长周期内增强保护作用。在此背景下，我们选择了亚硫酸氢钠甲萘醌，其对水分亏缺的保护作用此前已得到证实，但仅在短时间内有效。纳米封装似乎是改善生物刺激剂性能的一种有趣方法。我们的结果表明，壳聚糖/三聚磷酸钠纳米颗粒包封的亚硫酸氢钠甲萘醌（MSB）可以提高系统对施加的水分亏缺的耐受性，并将再次处理的需求推迟至少1周，加速复水后植物的恢复。这突出了纳米封装的积极特性，并展示了一个简单的封装过程如何能显著改善生物刺激剂的保护性能，为在田间条件下探索应对水分亏缺胁迫的新可能性开辟了道路。
