Gómez-Bellot María José, Lorente Beatriz, Medina Sonia, Gil-Izquierdo Ángel, Durand Thierry, Galano Jean-Marie, Vicente-Sánchez Sergio, Ortuño María Fernanda, Sánchez-Blanco María Jesús
Department of Irrigation, CEBAS-CSIC, University Campus of Espinardo-Edif. 25, 30100 Espinardo, Spain.
Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, University Campus of Espinardo-Edif. 25, 30100 Espinardo, Spain.
Plants (Basel). 2022 Dec 8;11(24):3427. doi: 10.3390/plants11243427.
The use of reclaimed water is considered an efficient tool for agricultural irrigation; however, the high salinity associated to this water could compromise plant quality and yields. Balm and spearmint plants were submitted for 15 days to three irrigation treatments in a controlled chamber: control with EC: 1.2 dS m (control), reclaimed water from secondary effluent (EC: 1.6 dS m) (S) and water from secondary effluent with brine (EC: 4.4 dS m) (SB). The plant water status, stomatal and hormonal regulation, nutritional response, concentration of amino acids and plant oxidative stress-based markers, as well as growth were evaluated. Both species irrigated with saline reclaimed water reduced leaf water potential and gas exchange in comparison with control plants, following 2 days of exposure to irrigation treatments. Nevertheless, spearmint plants recovered photosynthetic activity from the seventh day onwards, maintaining growth. This was attributed to hormonal changes and a greater accumulation of some amino acids and some plant oxylipins (phytoprostanes) in comparison to balm plants, which contributed to the improvement in the organoleptic and health-promoting properties of spearmint. A longer irrigation period with saline reclaimed water would be necessary to assess whether the quality of both species, especially spearmint, could further improve without compromising their growth.
再生水的使用被认为是农业灌溉的一种有效手段；然而，这种水的高盐度可能会影响植物质量和产量。在可控环境舱中，对香脂薄荷和留兰香植物进行了为期15天的三种灌溉处理：电导率为1.2 dS/m的对照处理（对照）、二级出水的再生水（电导率为1.6 dS/m）（S）以及含盐水的二级出水（电导率为4.4 dS/m）（SB）。评估了植物的水分状况、气孔和激素调节、营养反应、氨基酸浓度、基于植物氧化应激的标志物以及生长情况。与对照植物相比，用含盐再生水灌溉的两种植物在经过2天的灌溉处理后，叶片水势和气体交换均降低。然而，留兰香植物从第七天起恢复了光合活性，并保持了生长。这归因于激素变化以及与香脂薄荷相比，留兰香中一些氨基酸和一些植物氧脂素（植物前列腺素）的积累更多，这有助于改善留兰香的感官特性和促进健康的特性。需要更长时间用含盐再生水进行灌溉，以评估这两种植物，尤其是留兰香，在不影响其生长的情况下，质量是否能进一步提高。
