Effects of Gibberellin (GA3) Concentration on the Quality of White Java Plum (Syzygiumcumini)

Abstract

White Java plum (Syzygiumcumini) is a native plant of Indo-Malaysia, which has been only infrequently in the wild and even more rarely when cultivated. That is because the quality of java plum fruit is very low, and hence affecting society’s demand for the fruit. This study aimed to determine the quality improvement of white java plum fruit due to the induction of gibberellins. There were several fruit quality parameters applied in the study, including seed size, fruit size, the weight of seeds and fruit, thick fruit flesh, and sugar content in fruit. The study was conducted at Kadiri University, Kediri City, East Java, in August-September 2019. The experiment employed a Completely Randomized Design with a single factor, which was the induction of gibberellins with 5 levels of concentration (0, 25, 50, 75, and 100 ppm) and 6 replications. The white java plum tree utilized as an experimental sample was 10 years old. The results showed that the induction of gibberellins at a concentration level of 75 ppm was able to improve the quality of the white java plum, in spite of the fact that, on average, the parameters were not significantly different from the concentration of 100 ppm.