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Differences in salt tolerance of some fruit species



Differences in salt tolerance of some fruit species



Egyptian Journal of Horticulture 17(1): 1-8



The effect of salinity on survival and distribution of Na+ and Cl- in seedling of eleven fruit species was studied. The seedlings were grown in nutrient solution salinized with 174 mM NaCl. The results demonstrated a wide variation in response to salinity. The relative salt tolerance was in the following increasing order: apricot, peach, almond, mango, sour orange, apple, pear, grape, guava, olive and date palm. Salinity increased Na+ and Cl- in leaves and roots of the salt treated plants. In all the studied fruit species except date palm, Cl- was relatively high in roots and low in leaves. The specie which exhibited a greater degree of salt tolerance than the other, contained lower Cl- in the leaves. This indicated that the ability of these fruit species to tolerate salinity seems to depend on its ability for chloride exclusion. In contrast, date palm seedlings accumulated Na and Cl- in the leaves and this may serve as useful function by providing osmotic solutes.

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