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Abstract
Boron (B) is an essential nutrient required in very small amount by crop plants and it can become toxic to plants when present in slightly higher amount. Increasing concentration of B is often found in association with salinity. The presence of salinity and high B may result in synergistic or antagonistic effects on plant growth. A hydroponic trial was conducted to evaluate the influence of various levels of B on the growth, physiological and biochemical responses of salt tolerant and sensitive wheat genotypes under saline conditions. The present study comprised of twelve treatments including four rates of B (control, 0.5, 1 and 1.5 mM) and three levels of salinity (control, 100 and 200 mM NaCl). Two salt tolerant (SARC-I and Sehar-2006) and two salt sensitive (Koistan-90 and MH-97) wheat genotypes were used. The tested salt tolerant and sensitive wheat genotypes showed significant variations and responded differently to salinity and B individually as well as in combination. The salt tolerant genotypes showed better growth due to high antioxidant activity, maintenance of photosynthesis and stomatal conductance and low leaf Na, B and Cl concentration in the presence of individual and combined stresses of salinity and high B as compared to sensitive genotypes. The highest level of salinity and B in combination caused the highest reduction in plant growth as compared to their respective controls. However the interactive effect of salinity and boron was antagonistic as increasing salinity reduced boron toxicity while increasing boron reduced harmful effects of salinity on growth and physiological attributes of wheat

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Tayyaba Naz, Javaid Akhtar, Muhammad Anwar-ul-Haq, Muhammad Saqib, Muhammad Mazhar Iqbal, Muhammad Shahid. (2018) INTERACTION OF SALINITY AND BORON IN WHEAT AFFECTS PHYSIOLOGICAL ATTRIBUTES, GROWTH AND ACTIVITY OF ANTIOXIDANT ENZYMES, , Volume 55, Issue 2.
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Pakistan Journal of Agricultural Sciences
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Volume 55
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