Effect of K + Concentration on Physiological Indexes of Tilia amurens under Low Temperature Stress
2-year-old Tilia amurens seedlings were treated with different concentrations of kalium ion (50% , 100% , 150% , 200% , 250%) aiming to approach the optimal concentration range for improving the cold resistance of seedlings. The changes of different physiological indexes of T. amurens seedlings, such as the relative osmosis of protoplasm membrane, contents of MAD, soluble sugar and dissociative proline, were detected under low temperature conditions (around - 10 degree C) after 2,4,6,8 and 10 hours of treatment, respectively. Results show that the contents of MDA and dissociative proline exhibit irregular changes, while the relative osmosis of protoplasm membrane and the content of soluble sugar present significant variations under different K+ treatments, which demonstrates that the resistance of T. amurens seedlings to low temperature stress is improved. The seedlings treated with K+ at a concentration of 250% have high cold-resistances.
Tilia amurensLow temperature stressK+Physiological indexes
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NSTL
万方数据
维普
