Bonasia Anna, Lazzizera Corrado, Elia Antonio, Conversa Giulia
Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, 71100 Foggia, Italy.
Plants (Basel). 2025 Mar 10;14(6):863. doi: 10.3390/plants14060863.
A greenhouse trial was conducted in Southern Italy to examine the effects of foliar applications of two substances, methyl-jasmonate (MeJA) and a zeolite, on the harvest and post-harvest performance of two hydroponically grown baby leaf genotypes (leafy chicory 'Cicoria costa rossa'; kale 'Cavolo nero'). MeJA is a phyto-hormone primarily studied for fruit and post-harvest applications, while zeolite is typically used for pest and disease biological control. MeJA (Sigma-Aldrich Merck KGaA, Darmstadt, Germany), and a commercial zeolite (Big-Zeo, Agricola Internazionale s.r.l., Pisa, Italy) (BigZeo) were sprayed twice at the second and fourth true leaf stages (BigZeo, 5 kg ha; MeJA, 250 µM). Bio-physiological (yield, dry matter DM, chlorophyll CHL, weight loss WL) and qualitative (nitrate, carotenoids, phenols, flavonoids, anthocyanins, antioxidant activity) traits were evaluated in both raw and fresh-cut (7 day-cold-stored) products. Treatments did not significantly affect yield (1.0 kg m), while plant responses to the substances concerning other traits were genotype-dependent. MeJA enhanced greenness (CHL), texture (DM), and antioxidant activity (by increasing carotenoids and flavonoids) in chicory. In contrast, zeolite improved greenness, texture, and antioxidant activity (by increasing carotenoids, anthocyanins, and phenols), and reduced nitrate in kale. Treatments did not affect weight loss (2.2 g 100 g f.w., on average). After 7 days of storage, MeJA-treated chicory and zeolite-treated kale exhibited improved textural and nutritional quality.
在意大利南部进行了一项温室试验，以研究叶面喷施两种物质——茉莉酸甲酯（MeJA）和一种沸石，对两种水培生菜基因型（叶用菊苣‘Cicoria costa rossa’；羽衣甘蓝‘Cavolo nero’）收获期及采后性能的影响。MeJA是一种主要针对果实和采后应用进行研究的植物激素，而沸石通常用于病虫害的生物防治。在第二和第四片真叶期对MeJA（德国达姆施塔特市默克集团旗下的西格玛奥德里奇公司生产）和一种商用沸石（意大利比萨市Agricola Internazionale s.r.l.公司生产的Big-Zeo）进行了两次喷施（Big-Zeo，5千克/公顷；MeJA，250微摩尔）。对生鲜产品和鲜切产品（冷藏7天）的生物生理特性（产量、干物质（DM）、叶绿素（CHL）、失重（WL））和品质特性（硝酸盐、类胡萝卜素、酚类、黄酮类、花青素、抗氧化活性）进行了评估。处理对产量（1.0千克/平方米）没有显著影响，而植株对这些物质在其他特性方面的反应则取决于基因型。MeJA提高了菊苣的绿度（CHL）、质地（DM）和抗氧化活性（通过增加类胡萝卜素和黄酮类物质）。相比之下，沸石提高了羽衣甘蓝的绿度、质地和抗氧化活性（通过增加类胡萝卜素、花青素和酚类物质），并降低了其硝酸盐含量。处理对失重没有影响（平均为2.2克/100克鲜重）。冷藏7天后，用MeJA处理的菊苣和用沸石处理的羽衣甘蓝在质地和营养品质方面均有所改善。
