Effects of PEG-6000 Stress on Seed Germination and Seedling Physiological  Indexes of Three Cucumber Varieties(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effects of PEG-6000 Stress on Seed Germination and Seedling Physiological  Indexes of Three Cucumber Varieties

Author(s):: ZHANG Qingxia; KOU Erfeng; (College of Agriculture ＆ Forestry Sci-Tech,Longdong University,Qingyang,Gansu 745000)

Abstract:: Seeds of three common cucumber varieties were tested under different concentrations of PEG-6000(mass concentration 5%,10%,15%,20%) simulated drought stress.The testing items included germination rate of seeds,relative germination rate, germination index,seed germination drought resistance index,vigor index,seed vigor index of drought resistance,radicle length,chlorophyll content, MDA content and proline content.The results showed that,under stress of different PEG-6000 concentrations solution,the germination rate, the seed germination drought resistance index and radicle length of the various cucumber varieties,had a significant negative correlation with the concentration of PEG solution.As the PEG solution concentration increased,the MDA and the proline content in all seedlings of cucumber varieties increased,while chlorophyll content decreased.Drought resistance of each variety differed.‘Ludiwang’ showed the strongest drought resistance,it was more superior in germination and physiological indexes than other varieties.

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Last Update: 2017-04-18