The effect of gibberellic acid application methods on morphophysiological traits, biochemistry indices, and fruit number of Jerusalem Cherry (Solanum pseudocapsicum L.)

A greenhouse experiment was performed on jerusalem cherry treated with gibberellic acid (ga3) in four levels (0 (control), 100, 200, and 400 mg/lit) and three types of application method (foliar, drip treatment, and foliar + drip treatment). results showed significant reciprocal effects of experimental factors on plant height, lateral shoot length, lateral shoot number, fruit number, root length, root wet weight, stem wet weight, chlorophyll (a, b, total), pigment function, chlorophyll index, and reducing sugars. simultaneous application of foliar spray and drip application method + ga3 increased carotenoid and leaf area ratio compared to the use of each treatment alone. the highest amount of chlorophyll a (19.75 μg/ml), chlorophyll b (4.63 μg/ml), total chlorophyll (25.27 μg/ml), and the total amount of pigments (27.67 μg/ml) were obtained by leaf foliar spray and drip treatment with 400 mg/lit, drip treatment with 200 mg/lit, and foliar spray and drip application method with 200 mg/lit concentration. the use of ga3 increased the number of fruits, pigment performance, and reducing sugars. combined ga3 application methods of leaves foliar spray + drip application) resulted in better performance than each method alone. therefore, combined application method is recommended for ga3 treatment to improve jerusalem cherry's morphological and photochemical characteristics.