Foliar application of mineral nutrients, proteins, and plant growth regulators is frequently practiced on strawberries for better yield and extended harvest period. Here, we evaluated the influence of 24-epibrassinolide, a brassinosteroid, on strawberry plant growth, yield, and fruit quality. Healthy strawberry plants were foliar sprayed with 1, 2 and 3 µM 24-epibrassinolide after 100, 115, and 130 days of runner transplantation. Foliar application of 24-epibrassinolide enhanced specific leaf area and root-to-shoot ratio in concentration-dependent manner. Though, root weight ratio and leaf area ratio were also positively influenced with 24-epibrassinolide applications, but plants treated with 2 µM 24-epibrassinolide exhibited maximum response. Overall, better vegetative growth of plants exogenously treated with 3 µM 24-epibrassinolide led to threefold increase in flowering and better fruit harvest index than control plants. Principal component analysis was further employed to delineate concentration-dependent effects of 24-epibrassinolide. Though, foliar application of 1 µM 24-epibrassinolide was positively correlated with fruit pH and 2 µM 24-epibrassinolide application had a promotive impact on leaf area, plant dry weight, and fruit sugars but foliar spray of 3 µM 24-epibrassinolide was most influential in inducing plant vegetative growth (leaf area ratio, specific leaf area, root-to-shoot ratio, root weight ratio and shoot weight ratio), yield (flowers and fruits per plant and harvest index), and quality attributes (sugar–acid ratio, ascorbic acid, and organoleptic characteristics) of strawberry fruits. Conclusively, results suggest that foliar application of 3 µM 24-epibrassinolide favours vegetative growth, enhances yield and improves quality of strawberry fruit.

经常在草莓上使用矿质营养素、蛋白质和植物生长调节剂进行叶面喷施，以提高产量和延长收获期。在这里，我们评估了 24-表油菜素内酯（一种油菜素内酯）对草莓植株生长、产量和果实品质的影响。在转轮移植 100、115 和 130 天后，对健康的草莓植物进行叶面喷洒 1、2 和 3 µM 24-表布拉斯内酯。叶面喷施 24-表布拉斯内酯以浓度依赖的方式增加比叶面积和根茎比。虽然根重比和叶面积比也受到 24-表油菜素内酯应用的积极影响，但用 2 µM 24-表油菜素内酯处理的植物表现出最大的响应。全面的，用 3 µM 24-表布拉斯内酯外源处理的植物的营养生长更好，开花增加了三倍，果实收获指数比对照植物更好。进一步采用主成分分析来描述 24-表油菜素内酯的浓度依赖性效应。虽然，叶面喷施 1 µM 24-表油菜素内酯与果实 pH 值呈正相关，2 µM 24-表油菜素内酯的喷洒对叶面积、植物干重和果实糖分有促进作用，但叶面喷洒 3 µM 24-表油菜素内酯的影响最大在诱导植物营养生长（叶面积比、比叶面积、根茎比、根重比和茎重比）、产量（每株花卉和果实和收获指数）和质量属性（糖酸比） ，抗坏血酸，和感官特征）草莓果实。总之，结果表明，叶面喷施 3 µM 24-表布拉斯内酯有利于草莓果实的营养生长、提高产量和质量。