几种化学调控物质对盐胁迫下小麦幼苗生长及生理指标的调控作用  

Effect of Seed Soaking with Four Chemical Regulators on Root and Seedling Growth of Different Wheat Genotypes under NaCl Stresses

作　　者：刘良全[1] 张水利[2] 景小元[2] 王璐[1] 张永清[1] 

机构地区：[1]山西师范大学生命科学学院,山西临汾041004 [2]山西师范大学城市与环境科学学院,山西临汾041004

出　　处：《麦类作物学报》2010年第1期73-78,共6页Journal of Triticeae Crops

基　　金：国家自然科学基金项目(30871483);山西省自然科学基金项目(2006011086)

摘　　要：为了探明化学调控物质对盐胁迫下小麦幼苗及根系生长的调控作用,采用水培方式研究了烯效唑、水杨酸、硅酸钠、硝酸镧等4种化学调控物质浸种对盐胁迫条件下2个小麦品种(临汾8050和临旱536)根系及幼苗生长的影响。结果表明,适当浓度的化学调控物质浸种可以显著或极显著地减少盐胁迫下小麦幼苗的MDA含量,增加幼苗的次生根数、总根长、根冠比、功能叶面积、叶片叶绿素含量、根系Pro含量、SOD和POD活性,但可溶性糖含量的提高未达显著水平。2个小麦品种对化学调控物质处理的敏感程度存在差异。适当浓度化学调控物质浸种能有效缓解盐胁迫对小麦幼苗根系的伤害,具有显著促进小麦根系生长、培育壮苗的作用。In order to determine the regulatory effect of chemical regulators on root growth of wheat under salt stress, a solution culture experiment using NaCl to induce salt stresses was carried out to evaluate the effects of seed soaked with four chemical regulators（S-3307 ,SA, NaSiO4,and La（NO3）a） on the growth and antioxidant enzyme activity of wheat seedling and root. The results showed that： comparing with the control, seed soaking with chemical regulators enhanced seedling growth and increased the plant height, leaf area, total root length and number, and fresh weight, chlorophyll content and Pro content and the activities of SOD and POD; The soluble sugar content increased unsignificantly ; The MDA decreased significantly at the same time. Soaking seeds with chemical regulators could play an important role in raising healthy wheat seedlings wheat under slat-stresses.

关 键 词：小麦 化学调控 盐胁迫 幼苗 生理指标 

分 类 号：S512.1[农业科学—作物学] S311