Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil.
Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Biologia Aplicada à Agropecuária, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil.
J Sci Food Agric. 2022 Jan 30;102(2):801-812. doi: 10.1002/jsfa.11415. Epub 2021 Jul 19.
Sunscald is a physiological disorder that occurs in many horticultural products when exposed to excessive solar radiation and high temperatures. Traditionally, sunscald is controlled using physical barriers that reflect radiation, however this practice is not always efficient. A possible alternative would be the use of chemical barriers, such as mycosporine-like amino acids (MAAs), which protect aquatic organisms against ultraviolet (UV) radiation. Thus, this study aimed to develop a lipid-based emulsion containing MAAs for using in the preharvest of horticultural products.
Emulsions were developed using 10% (w/v) of corn oil (CO) and soybean oil (SO), carnauba wax (CW), and beeswax (BW) as lipid bases (LBs). The emulsion containing CW and ammonium hydroxide was the most stable, resembling commercial wax. Therefore, this formulation was used as the basis for the incorporation of the commercial product Helioguard™ 365, a source of MAA, in concentrations of 0%, 1%, 2%, and 4% (v/v). The MAA incorporation resulted in little modifications in the stability of the emulsion, providing an increase in the absorbance with peaks in the UV-B ranging from 280 to 300 nm.
The lipid-base emulsion containing MAAs could be used as a chemical barrier to control sunscald in horticultural products. © 2021 Society of Chemical Industry.
日灼是园艺产品在遭受过量太阳辐射和高温时发生的一种生理失调。传统上，通过反射辐射的物理屏障来控制日灼，但这种做法并不总是有效。一种可能的替代方法是使用化学屏障，如菌多酚类氨基酸（MAAs），它可以保护水生生物免受紫外线（UV）辐射。因此，本研究旨在开发一种含有 MAAs 的脂质乳液，用于园艺产品的采前处理。
使用 10%（w/v）的玉米油（CO）和大豆油（SO）、巴西棕榈蜡（CW）和蜂蜡（BW）作为脂质基础（LB）开发了乳液。含有 CW 和氨的乳液最稳定，类似于商业蜡。因此，该配方被用作商业产品 Helioguard™ 365 的基础，这是一种 MAAs 的来源，浓度分别为 0%、1%、2%和 4%（v/v）。MAAs 的掺入对乳液的稳定性几乎没有影响，在 UV-B 范围内从 280 到 300nm 处的吸收峰增加。
含有 MAAs 的脂质基乳液可用作控制园艺产品日灼的化学屏障。© 2021 化学工业协会。
