核农学报2011，Vol.25Issue(2)：342-347,390,7.
种子引发对NaCl胁迫下小麦幼苗生理特性的影响
EFFECT OF SEED PRIMING ON PHYSIOLOGICAL CHARACTERISTICS OF WHEAT SEEDLING UNDER SALT STRESS
摘要
Abstract
In this study, two winter wheat varieties, Jinnong 207 with strong salt tolerance and Yunmai 218 with weak salt tolerance were taken as the tested materials, 20％ PEG and 100mmoL/L KNO3 water solution were used to prime their seeds to study the effect of priming on germination of wheat seeds, salt tolerance and physiological characters of seedlings under stimulated salt stress. Results showed that the priming treatments both improved germination potential,germination rate, germination index and activity index of two varieties. Membrane permeability of two varieties significantly declined, while the contents of soluble proteins obviously increased. The salt tolerance index and salt tolerance ratio of the two variet ies were improved to different degrees. Under salt stress by 100mmol/L NaCl, membrane permeability and contents of MDA of the two varieties decreased; the activities of POD, SOD and contents of RNA,proline, and soluble proteins were improved, indicating that seed priming enhanced salt tolerance of wheat seedlings by improvement of activities of antioxidant enzymes and the contents of osmotic regulatory substances and soluble protein.The study also revealed that seed priming had better effect on Yunmai 218 with weak salt tolerance than that on Jinnong 207 with strong salt tolerance, and generally priming effect of KNO3water solution was better than that of PEG.关键词
种子引发/小麦/NaCl胁迫/生理特性/耐盐性Key words
seed priming/ wheat/ NaCl stress/ physiological characters/ salt tolerance引用本文复制引用
史雨刚,孙黛珍,雷逢进,杨进文,王曙光..种子引发对NaCl胁迫下小麦幼苗生理特性的影响[J].核农学报,2011,25(2):342-347,390,7.基金项目
山西省科技攻关项目(2007031001-6) （2007031001-6）
