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چکیده
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Salicylic Acid (SA) was at the inception of the sale of pharmaceutical substances that was made in Germany in 1898. SA has been widely distributed in the plant chain and is known as a group of plant growth hormones. SA In plant metabolism, various regulating roles, such as resistance to thermal salinity in plants. To study the effects of various concentrations of salicylic acid (0, 3-10, 2-10 and 1-10 × 3 mol) on the electrolyte leakage of tomato membrane under different temperature conditions (25 ± 3 and 37 ± 3 ° C), and The effects of various concentrations of salicylic acid (0, 3-10, 4-10 and 6-10 mol) on Na Na concentration in different concentrations of potassium (1.46 and 1.33 gr / l) of tomato nymphal medium with 5 treatments And 4 replicates and 4 treatments and 4 replicates in factorial arrangement in a completely randomized design. In the heat stress test after spraying, the plants were placed in designated environments for 48 hours. After the desired time, the electrolyte membrane leakage was measured. The electrolyte leakage rate was 48% in the control treatment at a temperature of 3 ± 25 to 77% at 37 ± 3 ° C, indicating a significant effect on ion leakage. In the presence of SA, a decreasing trend was observed in the electrolyte leakage of the membrane and the highest reduction was observed at a high temperature of 3-10 mA SA. At low temperatures, the concentration of 1-10 × 3 mole led to the lowest ion leakage. High temperatures increase the electrolyte leakage from the membrane, and the presence of SA can prevent the increase of ion leakage from the membrane and increase of heat resistance in tomato. In the study of the effects of different concentrations of salicylic acid on Na Na concentration in different concentrations of potassium, chlorophyll content, leaf area, leaf length and width, root and shoot length, height, diameter, shoot size and sodium and potassium content of shoots and roots. Became Chlorophyll index, total fresh weight, root fresh
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