Uptake and distribution of K, Na and S ions in salt-treated seedlings of mango.
Nigam J. K., Sant Ram, Misra K. K.
Author Affiliation: Department of Horticulture, G.B. Pant University of Agriculture and Technology, Pantnagar 263 145, India.
Indian Journal of Horticulture 59 : 17-23
Abstract : Twenty-seven mango cultivars were screened for salt tolerance under greenhouse conditions. Seedlings were irrigated daily with Hoagland solution with or without 4.5 dS/m salt solution (sodium chloride+sodium sulfate). Six salt-tolerant cultivars (Dudhia Langra, Guruwari, Hybrid 15/1, Kala Hapus, Kurtha Kolumban, and Nariyal) were further tested for tolerance to salinity (0, 4.5, 7.5, and 9.0 dS/m). Seedlings irrigated with saline solutions after 30 days of establishment were analysed for K and Na contents after 4 months of treatment. The K, Na and S contents of leaves, stems, and roots increased in all cultivars with the increase in salinity. Hybrid 15/1 had the highest K and Na contents in leaves and stems and the highest K concentration in roots as well, which indicated that it was the most tolerant among the evaluated cultivars. Variation in root Na content among cultivars was not significant. Hybrid 15/1 recorded the lowest S concentration in stems, leaves, and roots.