Effects of naphthalene acetic acid (NAA) on the fruit growth, chlorophyll, maturity index and sugar content in water apple

Abstract

The experiment was carried out to investigate the effect of NAA on the growth and development of water apple fruits (Syzygium samarangense). Three concentrations of GA3 at 6, 12, 18 mg/l and water control were applied using swabbing technique. The number of buds and fruit setting were increased at 6 mg/l NAA concentration as compared to the other treatments. It also decreased the premature fruit dropping. It was found that the application of NAA at 6mg/l increased fruit length and diameter. In addition to that fruit growth, maturity development and per fruit weight were higher at NAA at 6mg/l compared to other concentrations and water control. With regard to fruit quality, the application of NAA at 6mg/l increased TSS (soluble sugar), besides, acid conten (pH) were higher in treated fruits than water control. From this study it can be seemed that 6mg/l NAA was showed better results than other concentrations and water control.