Nutritional responses of grafted cucumber on two types of Iranian local squash to alkalinity and salinity stresses

Abstract

High bicarbonate (HCO₃^-) content and associated high pH of irrigation water are detrimental to plant nutrient absorption. This experiment was arranged as a factorial in the framework of a completely randomized design with two factors, rootstock (ungrafted cucumber, Cucurbita moschata, and Cucurbita maxima) and bicarbonate (10 mM NaHCO₃ or AS and 10 mM NaCl or SS). Regardless of rootstock, bicarbonate increased the pH of nutrient solution in all treatments. Under NaHCO₃ treatment, the uptake and leaf concentration of K and Fe, and Mn uptake were not affected in plants grafted onto C. moschata rootstocks, whereas a significant decrease of them recorded in the control plants. Although the effect of alkalinity and rootstocks on Mg concentration was not significant, the highest Mg uptake observed in plants grafted onto C. moschata rootstocks. It is concluded that using C. moschata rootstock could reduce the deleterious effects of alkalinity stress on nutrient uptake by cucumber plants.

Keywords:

• Alkalinity
• bicarbonate
• Cucumis sativus
• grafting
• rootstock

Acknowledgments

Here we would like to thank Azar Abkesht Sahand Company for the financial support of the research.

Disclosure statement

No potential conflict of interest was reported by the authors.