Salt torelance of mango rootstocks (Magnifera indica L. cv. Osteen)

Abstract

The aim of this work was to establish the criteria to determine the relative tolerance of mango rootstocks (Mangi-fera indicaL.) to high Cl-and Na+concentrations present in irrigation water. Two rootstocks, Gomera-1 and Gomera-3 grafted with the cultivar Osteen, were subjected to study. Grafted plants were exposed to salinized irrigation watersmeasured by electrical conductivity (1.02, 1.50, 2.00 and 2.50 dS m-1). Results indicated differences in retaining toxic elements in different organs (roots, stem, or leaves) of both rootstocks. Gomera-3 was more sensitive as took uphigher amounts of Cl-and Na+than Gomera-1. Gomera-1 was more tolerant, being the tolerance possibly associatedwith the capacity of this rootstock to restrict the uptake and transport of Cl-and Na+ions from the root system to theaboveground parts. The Cl-ions were more toxic in rootstock and cultivar leaves, while the Na+ions were more toxicin the roots. Therefore, the present study reveals that Gomera-1 proved to be the most adaptable rootstock to salineconditions, making it feasible for use in areas with low water quality