Uptake and distribution of nutrient ions in salt treated seedlings of mango germplasm.
Nigam J. K., Misra K. K.
Author Affiliation: Department of Horticulture, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar 263 145 (Uttaranchal), India.
9 : 1-13
Abstract : The uptake and distribution of ions in 24 two-month-old seedlings of different mango genotypes (Dudhia Langra, Gurwari, Hybrid 15/1, Kala Hapus, Krutha Kolumban and Nariyal) treated with salt (NACl and Na2SO4 at 4.5 dS/m) were investigated in pots filled with river sand. Among these, the genotypes showing salt tolerance were exposed to salt concentrations of 0.0, 4.5, 7.5 and 9.0 dS/m during 2000-01. Results showed that Na accumulation was higher in roots than in leaves and stems, while Cl accumulation was higher in leaves than stems and roots. Salt treatment at 4.5 dS/m significantly reduced P content in the cultivars at varying degrees. Leaf, stem and root Ca, Mg and K content decreased with increasing salt concentration. Na content in all plant parts increased with increasing salinity. Leaf Cl content increased significantly with increasing salt concentrations. S content in all parts of the seedlings increased with increasing salinity. Among the cultivars, Hybrid 15/1 was the most tolerant to salinity.