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Improvement in tolerance to salt stress during tomato cultivation
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Improvement in tolerance to salt stress during tomato cultivation
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This study was conducted to evaluate the physiological impact of seed priming on improving the salt tolerance of tomato cultivars H-2274 and Rio Grande. Tomato seeds were primed with 5 M NaCl solution at 20 °C for 3 days in a dark environment. | Turkish Journal of Biology http://journals.tubitak.gov.tr/biology/ Research Article Turk J Biol (2014) 38: 193-199 © TÜBİTAK doi:10.3906/biy-1307-62 Improvement in tolerance to salt stress during tomato cultivation Mustafa DEMİRKAYA* Safiye Çıkrıkçıoğlu Vocational College, Erciyes University, Kayseri, Turkey Received: 31.07.2013 Accepted: 05.11.2013 Published Online: 28.03.2014 Printed: 28.04.2014 Abstract: This study was conducted to evaluate the physiological impact of seed priming on improving the salt tolerance of tomato cultivars H-2274 and Rio Grande. Tomato seeds were primed with 5 M NaCl solution at 20 °C for 3 days in a dark environment. The seeds of the control treatments were handled in a similar way, using tap water instead of NaCl solution. After the priming procedure, seeds were washed and sown in standard germination trays. From each treatment group, 21 homogeneous seedlings were transplanted into 10-L pots full of turf for subsequent salinity experiments. In order to avoid osmotic shock, the volume of the applied NaCl solutions (0 mM, 100 mM, and 200 mM NaCl) was increased from 30 mL/day to 50 mL/day after 5 days. As a major physiological parameter, the chlorophyll content was evaluated 3 times during the experimental phase. Furthermore, the mineral compositions (Na, K, Ca, and Mg) of the leaves as well as the content of soluble sugars (glucose, fructose, and sucrose) were evaluated at the end of the experiment. Consequently, it was found that seed priming with NaCl may provide a good alternative to reduce salinity-induced stress in tomato plants. Key words: Lycopersicon esculentum, plant physiology, salinity, seed priming 1. Introduction Tomatoes are one of the most frequently consumed vegetables in many countries, being the main source of several phytonutrients and providing important nutritional value to the human diet (Willcox et al., 2003). During their lifespan, plants are frequently exposed to various negative conditions. Such .
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