The effects of interaction between Zinc and Manganese on the rate of growth and certain parameters of photosynthesis in tomato crop (Lycopersicon esculentum. Mill cv. Urbana Early 111)
Subject Areas : Geneticسمیه Ebrahimi 1 , سارا Saadatmand 2 , R.A Khavari-nejad 3
1 - Department of Biology, Faculty of Sciences, Islamic Azad University of Science and Research Branch, Tehran, Iran.
2 - Department of Biology, Faculty of Sciences, Islamic Azad University of Science and Research Branch, Tehran, Iran.
3 - Department of Biology, Faculty of Sciences, Islamic Azad University of Science and Research Branch, Tehran, Iran.
Keywords: growth, Toxicity, Zinc, Tomato, Manganese, Pigments of leaf,
Abstract :
In this study, the effects of interaction between zinc (0, 20, 30, and 60 µMZnSo47H2O) and manganese (0, 10, 20 and 30 µMMnSo4H2O) on certain parameters of growth and photosynthesis in 42-day old of tomato crop (Lycopersicon esculentum. Mill cv Urbana Early 111), has been investigated. Results showed that the resistant of tomato crop against stress of Zinc and Manganese, was little. After the first week's treatment, toxicity symptoms of Zinc and manganese was observed as overhang of parenchyma level and pigment accumulation of leaf. Parameters of growth and photosynthesis including values of root and leaf protein, insoluble and soluble sugars in the root, content of chlorophylls a and b, relative growth rate, specific leaf area and leaf area ratio were decreased under zinc and Manganese stresses. The results of this study showed that using high concentrations zinc and manganese caused high toxicity in tomato plants.
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