Abstrakt
This study was done using three nitrogenous compounds to evaluate their effects on postharvest characteristics of chrysanthemum (Chrysanthemum indicum) cut flowers. The study consisted of three separate and parallel experiments, in which ammonium sulfate, calcium nitrate and potassium nitrate were used in different concentrations of zero, 50, 100, 200 and 500 mg dm‒3 N for pretreatment of stems for 6 hour before transferring to holding d-water solution. The results showed that petal ion leakage and leaf SPAD values were increased by increasing ammonium sulfate, but not calcium or potassium nitrate. Petal carotenoids were increased by pretreatment of ammonium sulfate and potassium nitrate. There was constant increase in water uptake by increasing the levels of calcium nitrate and potassium nitrate, while ammonium sulfate at high concentrations (200 and 500 mg dm‒3 N) resulted in significant less water uptake compared to control. Ammonium sulfate in 50 and 100 mg dm‒3 increased shelf life of pretreated stems, but higher concentrations significantly reduced cut flowers shelf life. Increasing concentrations of calcium nitrate and particularly potassium nitrate have led to prolongation of flower shelf life to 12 days compared to 6 days of control. The results indicate that pretreatment of chrysanthemum cut flowers with ammonium sulfate in rather low concentrations or with moderate to high concentrations of calcium nitrate or potassium nitrate can significantly improve shelf life and postharvest flower qualities.
Bibliografia
Ahmadi, N., Mibus, H., Serek, M. (2009). Characterization of ethylene-induced organ abscission in F1 breeding lines of miniature roses (Rosa hybrida L.). Post. Biol. Technol., 52(3), 260–266.
De Capdeville, G., Maffia, L.A., Finger, F.L., Batista, U.G. (2005). Pre-harvest calcium sulfate applications affect vase life and severity of gray mold in cut roses. Sci. Hortic., 103(3), 329–338.
Doi, M., Reid, M.S. (1995). Sucrose improves the postharvest life of cut flowers of a hybrid Limonium. HortScience, 30(5), 1058–1060.
Druge, U. (2000). Influence of pre-harvest nitrogen supply on post-harvest behavior of ornamentals: importance of carbohydrate status, photosynthesis and plant hormones. Gartenbauwissenschaft, 65(2), 53–64.
Emongor, V.E. (2004). Effects of gibberellic acid on postharvest quality and vaselife life of gerbera cut flowers (Gerbera jamesonii). J. Agron., 3(3), 191–195.
Ichimura, K., Kawabata, Y., Kishimoto, M., Goto, R. Yamada, Y. (2003). Shortage of soluble carbohydrates is largely responsible for short vase life of cut ‘Sonia’ rose flowers. J. Japan. Soc. Horti., 70, 292–298
Kronzucker, H.J., Britto, D.T., Davenport, R.J., Tester, M. (2001). Ammonium toxicity and the real cost of transport. Trends Plant Sci., 6, 335–337.
Marschner, H. (2011). Marschner’s mineral nutrition of higher plants. Academic Press, London .
Mascarini, L., Lorenzo, G., Vilella, F. (2005). Nitrogen concentration in nutrient solution, post harvest life and flowers commercial quality in hydroponic gerbera. Acta Hortic., 697, 371.
Nergi, M.A.D., Ahmadi, N. (2014). Effects of 1-MCP and ethylene on postharvest quality and expression of senescence-associated genes in cut rose cv. Sparkle. Sci. Hortic., 166, 78–83.
Paull, R.E., Chantrachit, T. (2001). Benzyladenine and the vase life of tropical ornamentals. Postharvest. Biol. Technol., 21(3), 303–310.
Pineda, J., Sanchezdelcastillo, F., Gonzalez, A.M., Vazquez-Alarcon, A. (2010). Chrysanthemum response to foliar methanol application and nitrogen source in nutrient solution. Terra Latinoam., 28(2), 129–137
Pun, U.K., Ichimura, K. (2003). Role of sugars in senescence and biosynthesis of ethylene in cut flowers. Jap. Agric. Res. Quart., 37(4), 219–224.
Rahayu, Y.S., Walch-Liu, P., Neumann, G., Römheld, V., von Wirén, N., Bangerth, F. (2005). Root-derived cytokinins as long-distance signals for NO3−-induced stimulation of leaf growth. Exp. Bot., 56(414), 1143–1152.
Roude, N., Nell, T.A., Barrett, J.E. (1991). Longevity of potted chrysanthemums at various nitrogen and potassium concentrations and NH4: NO3 ratios. HortScience, 26(2), 163–165.
Sairam, R.K., Vasanthan, B., Arora, A. (2011). Calcium regulates Gladiolus flower senescence by influencing antioxidative enzymes activity. Acta Phys. Plant., 33(5), 1897–1904.
Skutnik, E., Lukaszewska, A., Serek, M., Rabiza, J. (2001). Effect of growth regulators on postharvest characteristics of Zantedeschia aethiopica. Post. Biol. Technol., 21(2), 241–246.
Souri, M.K., Neumann, G., Roemheld, V. (2009). Nitrogen forms and water consumption in tomato plants. Hortic. Environ. Biotechnol., 50, 377–383.
Starkey, K.R., Pedersen, A.R. (1997). Increased levels of calcium in the nutrient solution improves the postharvest life of potted roses. J. Am. Soc. Hortic. Sci., 122(6), 863–868.
Zamani, S., Kazemi, M., Aran, M. (2011). Postharvest life of cut rose flowers as affected by salicylic acid and glutamin. World Appl. Sci. J., 12(9), 1621–1624.
Zeng, C.L., Liu, L., Xu, G.Q. (2011). The physiological responses of carnation cut flowers to exogenous nitric oxide. Sci. Hortic., 127(3), 424–430.
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