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《Xinjiang Agricultural Sciences》 2018-01
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Drought Evaluation of Different Varieties of Flax

YAN Wen-liang;GUO Dong-liang;ZHONG Li;YANG Liang-jie;JIANG Hai-xia;ZHANG YU;XIE Li-qiong;College of Life Science and Technology,Xinjiang University;  
【Objective】To screen the suitable PEG-6000 concentration to evaluate the drought resistance of flax,and explore the causes of drought resistance in flax seeds.【Method】Different PEG-6000 concentrations( 0,5%,10%,15%,20%,25% and 30%) were used to simulate the drought stress on germination stage in 15 flax seeds and seven indicators including germination energy,germination rate were measured. Membership function method was used to comprehensively analyze the correlation among the water absorption rate,thousand-grain weight and drought resistance of flax seeds. 【Result】Under 5% PEG-6000 stress,except Atalante,the germination rate of the remaining cultivars was higher than that of CK. All of the variation coefficients of 20% PEG-6000 concentration were the highest among the three indicators of germination rate,bud length and total length. Under different treatments,the water absorption rate of flax seeds in 48 hours was obviously negatively correlated with the drought resistance of flax. 【Conclusion】Low PEG-6000 concentration can promote the germination of flax seeds. 20% PEG-6000 concentration is the optimum concentration of flax drought resistance to evaluate the difference of varieties in flax. The water absorption rate of seeds is one of the factors affecting the drought resistance of flax.
【Fund】: 新疆维吾尔自治区高技术项目(201517108);; 国家自然科学基金项目(31160056/C020408)~~
【CateGory Index】: S563.2
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