| In this paper, with cherry (Prunus pseudocerasus) as experimental materials, drying method, guaiacol method, three chloroacetic acid-thiobarbituric acid, three acid indene ketone method, variance analysis and multiple comparison method of stress conditions of high temperature and drought simulation, cherry leaf relative water content (RWC), POD activity, MDA content and proline, soluble protein, photosynthetic pigment content change research. The results show that:1, in the simulation under drought stress, the relative water content of leaves than in the control group were decreased in different degree, in which the simulated drought stress were the most serious (PEG-6000concentration30%) relative water content of leaves decreased the most obvious; leaf POD activity than the control group appeared. Rise, the moderate drought stress (PEG-6000concentration of20%) the POD activity increased most significantly; the content change of MDA and proline were similar, compared with the control group had increased to varying degrees, and simulated drought stress and more serious, the content of MDA and proline increased more significantly.2in the simulation of high temperature stress conditions, degree of leaf and plant cherry damage of different temperature and different. The higher the temperature of high temperature stress, with stress time increased, cherry leaf damage degree increase. The higher the temperature, the conductivity of cherry leaf is bigger, and with the extension of stress time, change trend of conductivity showed "S" curve. Cherry leaf malondialdehyde and proline content increases as the temperature rises, the higher the temperature, the more the content of leaves; change trend of SOD and the activity of POD in leaves of cherry seedlings with increasing temperature and generally increased first and then decreased, the higher the temperature, the more obvious trends with temperature changes; increasing, the stress time prolonged, cherry leaf carotenoid content decreased. |
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