Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2015.72.77Syzygium samarangense) Treated with Organic Acids]]>Nur IzzahK. AwangY. DingP. HafizaY. SatarM.G.M. 22015142This study reports the effectiveness of various concentrations of ascorbic acid, citric acid and oxalic acid used as acidulants to regulate activities of antioxidant, polygalacturonase, pectin methylesterase and polyphenol oxidase of fresh-cut wax apple (Syzygium samarangense). The samples of fresh-cut wax apple, cut in wedges (1/8), were dipped into ascorbic acid, citric acid and oxalic acid at four different concentrations (0, 0.5, 1.0, 1.5 and 2.0%) for 1 min. The changes in the parameters were monitored for nine days while they are in storage at 4°C. Fruit treated with oxalic acid contained the highest antioxidant activity, followed by those treated with citric acid and ascorbic acid. The activity of antioxidant increased with the increasing storage period. Similar effects of acid treatments were detected for total phenolic contents. There was no effect of types of organic acids on polygalacturonase activity but acid dipping reduced the activity of the enzyme. In contrast, types of acids and acid concentration did not alter the activity of pectin methylesterase activity. Activity of pectin methylesterase in fruit sampled on day 6 and 9 were higher than those of the earlier dates. Similar pattern of effects of acid treatment were observed for polyphenol oxidase activity.]]>Ali, Z.M., L.H. Chin and H. Lazan,200467317327Alothman, M., R. Bhat and A.A. Karim,2009115785788Altunkaya, A. and V. Gokmen,2008Lactuca sativa).]]>10711731179Anyasi, T.A., A.I.O. Jideani and G.R.A. Mchau,2015172515522Barrelt, D.M. and C. Gonzalez,199459574577Brummell, D.A. and M.H. Harpster,200147311339Chan, S.W., C.Y. Lee, C.F. Yap, W.M. Wan Aida and C.W. Ho,2009Citrus hystrix) peels.]]>16203213Chuni, S.H., Y. Awang and M.T.M. Mohamed,2010Hylocereus polyrhizus).]]>12713718Gil, M.I., E. Aguayo and A.A. Kader,20065442844296Gross, K.C.,198217933934Kahkonen, M.P., A.I. Hopia and M. Heinonen,20014940764082Kayashima, T. and T. Katayama,2002157313Kevers, C., M. Falkowski, J. Tabart, J.O. Defraigne, J. Dommes and J. Pincemail,20075585968605Khandaker, M.M., A.N. Boyce, N. Osman and A.S. Hossain,2012Syzygium samarangense [Blume] Merrill & L. M. Perry var. Jambu Madu) as affected by growth regulator application.]]>2012Kim, S.J. and K.M. Jung,2011Polyphenol oxidase) activity and total phenolic contents on browning and quality of dried-persimmon according to maturity degree of astringent persimmon (Diospyros kaki Thunb.).]]>7115 118Lim, Y.Y., T.T. Lim and J.J. Tee,20063920Pizzocaro, F., D. Torreggiani and G. Gilardi,1993172130Portela, S.I. and M.I. Cantwell,199814351357Riov, J.,197453312316Shiri, M.A., M. Ghasemnezhad, D. Bakshi and M. Saadatian,2011102506 2515Simirgiotis, M.J., S. Adachi, S. To, H. Yang and K.A. Reynertson et al.,2007Syzygium samarangense (Wax apple).]]>107813819Simsek, S. and A. Yemenicioglu,200742943950Soliva-Fortuny, R.C. and O. Martin-Belloso,200314341353Supapvanich, S., J. Pimsaga and P. Srisujan,2011Syzygium samarangenese [Blume] Merrill & L.M. Perry) during storage.]]>127912917Suttirak, W. and S. Manurakchinakorn,20107514Toivonen, P.M.A. and D.A. Brummell,200848114Yoruk, R., M.O. Balaban, M.R. Marshall and S. Yoruk,20022002pp: 74Zhu, Y., Z. Pan and T.H. Mchugh,200731632648Brummell, D.A.,200633103119Rocha, A.M.C.N. and A.M.M.B. Morais,200282120126