There has recently been a revival interest in use of distinct foliar treatments for obtaining uniform skin coloration of some table grape varieties. Poor coloration of grape skin in early ripening red table grape growing is one of the major problems that grape growers may run across. In order to cope with these difficulties in uneven skin coloration in table grape varieties, different foliar treatments such as abscisic acid and melatonin may be utilized. Grape skin color is one of the major quality factors, providing remarkable contributions to market values of table grapes and is found out by assessing anthocyanin content or color characteristics. In present research, it was benefited from various concentrations of foliar abscisic acid (S-ABA) and melatonin (Mt), including control, S‑ABA 300 mgL⁻¹, S‑ABA 400 mgL⁻¹, S‑ABA 500 mgL⁻¹, Mt 300 µM, Mt 400 µM and Mt 500 µM and CIELAB color system was used for quantifying skin color of berries. Study results showed that abscisic acid treatments were more effective than melatonin treatments on grape yield and quality characteristics and respectively, treatments of S‑ABA 500 mgL⁻¹, S‑ABA 400 mgL⁻¹, S‑ABA 300 mgL⁻¹, Mt 500 µM, Mt 400 µM, Mt 300 µM resulted in darker red skin color and higher total phenolic compounds content in ‘Early Cardinal’ grape variety.

最近，人们对使用不同的叶面处理来获得一些鲜食葡萄品种的均匀皮肤颜色重新产生了兴趣。早熟红鲜食葡萄种植过程中葡萄皮着色不良是葡萄种植者可能遇到的主要问题之一。为了解决鲜食葡萄品种皮肤颜色不均匀的这些困难，可以使用不同的叶面处理，例如脱落酸和褪黑激素。葡萄皮色是主要品质因素之一，对鲜食葡萄的市场价值做出了显着贡献，可通过评估花青素含量或颜色特征来发现。在目前的研究中，它受益于不同浓度的叶脱落酸 (S-ABA) 和褪黑激素 (Mt)，包括对照，S-ABA 300 mgL ^-1, S-ABA 400 mgL ^-1 , S-ABA 500 mgL ^-1 , Mt 300 µM, Mt 400 µM 和 Mt 500 µM 和 CIELAB 颜色系统用于量化浆果的皮肤颜色。研究结果表明，在葡萄产量和品质特性方面，脱落酸处理比褪黑激素处理更有效，S-ABA 500 mgL ^-1、S-ABA 400 mgL ^-1、S-ABA 300 mgL ^-1、Mt 500处理µM、Mt 400 µM、Mt 300 µM 导致'Early Cardinal'葡萄品种的皮肤颜色更深，总酚类化合物含量更高。