Aril browning is a serious physiological disorder especially under environmental stress in pomegranate (Punica granatum cv. ‘Rabab’). Evidence shows that calcium (Ca), boron (B), and brassinosteroids (BRs) could improve cellular protection, stimulates anthocyanin biosynthesis, and reduce pulp browning. In this experiment, the simple and interactive effect of 24-epibrassinolide (EBR) on increasing the efficiency of Ca and B on improving the aril browning disorder in ‘Rabab’ pomegranate was investigated. A factorial experiment was conducted in a randomized complete block design with the exogenous foliar spray of EBR at two levels − 0 (Ctrl.), and − 0.4 mg L⁻¹ and foliar nutrition contained − untreated (Ctrl.), − calcium chelate (2 g L⁻¹), − boric acid (0.5 g L⁻¹) and − calcium chelates (2 g L⁻¹) + boric acid (0.5 g L⁻¹). The foliar spray was applied a week before full bloom, 4 weeks after full bloom, and before the arils fully mature stage. The interactive effect of EBR1 + Ca + B had the highest influence on the reduction of the browning index (BI). This treatment significantly increases fruit total soluble solids (TSS), total anthocyanin, phenolic, and flavonoid content that had a negative correlation with the BI in cv. ‘Rabab’ pomegranate. Exogenous foliar spray of EBR significantly enhanced the effect of Ca and B on reducing the aril browning disorder, and this effect could be due to the improving the pollen function and fruit quality indices, which plays a very important role in controlling synthesis and preventing dissociation of anthocyanin.

假种皮褐变是一种严重的生理疾病，尤其是在环境压力下石榴（Punica granatum cv。'Rabab'）中。有证据表明，钙（Ca），硼（B）和油菜素类固醇（BRs）可以改善细胞保护，刺激花色苷的生物合成，并减少果肉褐变。在此实验中，研究了24-表油菜素内酯（EBR）对提高Ca和B改善'Rabab'石榴的假种褐变疾病的效率的简单和交互作用。在随机完整区组设计中进行了析因实验，其中外源性EBR叶面喷洒在两个水平下-0（Ctrl。），以及-0.4 mg L ^-1和叶面营养包含-未处理（Ctrl。），-螯合钙（ 2 g L ^-1），-硼酸（0.5 g L^-1）和-螯合钙（2 g L ^-1）+硼酸（0.5 g L ^-1）。在盛开前一周，盛开后4周以及假种皮完全成熟之前进行叶面喷雾。EBR1 + Ca + B的相互作用对褐变指数（BI）的降低影响最大。该处理显着增加了果实总可溶性固形物（TSS），总花色苷，酚和类黄酮含量，这些含量与cv中的BI呈负相关。'Rabab'石榴。外源EBR叶面喷洒显着增强了Ca和B对减少假种皮褐变的作用，这种作用可能是由于花粉功能和果实品质指数的改善，在控制合成和防止花粉的离解中起着重要作用。花青素。