Salinity effect on nutrient absorption in dwarf apple rootstocks (M.pomila)
Journal Title: Applied Science Reports - Year 2013, Vol 4, Issue 2
Abstract
Excess salt in the soil solution may adversely affect plant growth either through osmotic inhibition of water uptake by roots or specific ion effects. Specific ion effects may cause direct toxicity or alternatively, the insolubility or competitive absorption of ions may affect the plants nutritional balance (Greenway and Munns, 1980). Salinity was shown to increase the uptake of Na or decrease the uptake of Ca and K (Neel et al., 2002). Apple is one of the nonhalophite plants and susceptible to salinity stress. Therefore under salinity stress probably is reaches important damage to the plant metabolism and plant growth. In order to study the effects of salinity stress on elements absorption an experiment was conducted in west Azerbaijan agriculture research center of Iran in 2010. This experiment was arranged in a factorial using a randomized completely designs with three replications. The main factor was salinity treatment that included 4 levels: o, 2, 4 and 6 dsm-1 (ds/m) and the minor factor was seedling treatment of apple dwarf rootstocks that included 4 levels: Gami almasi, Azayesh, Malling number 9 and Malling Merton number 106. Results showed that apple dwarf rootstocks had different response to salinity stress in point of view nutrients absorption.The results of this work indicate that increasing salt concentration in the plants leads to: (a) a decline in the K, N and Cu concentration in leaves of plants (b) the increasing of Na and Cl concentration in leaves of all rootstocks (c) the reduction of P, Fe, B, Zn and Mn concentration in leaves of some rootstocks and the increasing concentration of these elements in some rootstocks. With increase of salinity amount of Na, Cl and Na/K ratio in leaves gradually were increased and K gradually was decreased, but with the most increase of salinity, amount of Na and Cl severely were increased and amount of K severely was decreased. Increasing level of salinity stress had negative effect on absorption of some element.
Authors and Affiliations
A Alizadeh, V Alizade , X Xelilova
Keywords
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