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Plant and Soil

, Volume 236, Issue 1, pp 123–128 | Cite as

Interactive effects of boron and salinity stress on the growth, membrane permeability and mineral composition of tomato and cucumber plants

  • M. Alpaslan
  • A. Gunes
Article

Abstract

A greenhouse study was conducted in order to determine interactive effects of NaCl salinity and B on the growth, sodium (Na), chloride (Cl), boron (B), potassium (K) concentrations and membrane permeability of salt resistant Tomato (Lycopersicon esculentum L. cv. Lale F1) and salt sensitive cucumber (Cucumis sativus L. cv. Santana F1) plants. Plants were grown in a factorial combination of NaCl (0 and 30 mM for cucumber and 0 and 40 mM for tomato) and B (0, 5, 10 and 20 mg kg−1 soil). Boron toxicity symptoms appeared at 5 mg kg−1 B treatments in both plants. Salinity caused an increase in leaf injury due to B toxicity, but it was more severe in cucumber. Dry weights of the plants decreased with the increasing levels of applied B in nonsaline conditions, but the decrease in dry weights due to B toxicity was more pronounced in saline conditions especially in cucumber. Salinity × B interaction on the concentration of B in both plants was found significant. However, increase in B concentrations of tomato decreased under saline conditions when compared to nonsaline conditions. Contrary to this, B concentration of cucumber increased as a result of increasing levels of applied B and salinity. Salinity increased Na and Cl concentrations of both plants.

Potassium concentration of tomato was not affected by salinity and B treatments, but K concentration of cucumber was decreased by salinity. Membrane permeability of the plants was increased by salinity while toxic levels of B had no effect on membrane permeability in nonsaline conditions. Membrane permeability was significantly increased in the presence of salinity by the increasing levels of applied B.

boron toxicity membrane permeability salinity 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  1. 1.Department of Soil Science and Plant Nutrition, Faculty of AgricultureUniversity of AnkaraAnkara-Turkey

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