PEG模拟水分胁迫对香椿种子萌发的生理生化指标影响  

PEG Simulated Water Stress Effects on Physiological and Biochemistry Indexes of Germination of Toona sinensis Seeds

作　　者：石贵玉[1,2] 廖文雪[1] 秦丽凤[1,3] 陆连连[1] 

机构地区：[1]广西师范大学生命科学学院,广西桂林541004 [2]广西环境工程与保护评价重点实验室,广西桂林541004 [3]桂林市林业科学研究所,广西桂林541004

出　　处：《福建林业科技》2009年第4期142-145,共4页Journal of Fujian Forestry Science and Technology

基　　金：广西环境工程与保护评价重点实验室研究基金(桂科能0702K027)资助

摘　　要：以香椿种子为材料,采用5%、10%、15%、20%的聚乙二醇(PEG-6000)溶液对香椿种子萌发进行人工水分胁迫处理,研究不同处理对种子萌发及幼苗生理生化指标的影响。结果表明,不同浓度的PEG处理胁迫对香椿种子的萌发均有一定的延缓作用;随着PEG浓度的上升,香椿种子的发芽率、发芽势、发芽速度及幼芽长度都呈现明显的下降趋势,POD、SOD活性呈上升趋势;低浓度的PEG对香椿幼根的生长有促进作用,随着PEG浓度的增加对香椿幼根的生长均表现抑制作用。Taking Toona sinensis seed as the material,the manual water stress treatment was conducted with different concentrations of polyethylene glycol（PEG-6000） solution（5%,10%,15%,20%）,different treatments effects on Toona sinensis seed germination and seedling physiological and biochemistry indexes were researched,The results showed that different concentrations of PEG handling stress on Toona sinensis seed germination had a certain delay role.With the increased concentration of PEG,Toona sinensis seed germination rate,energy,speed and scion length significantly showed the downward trend.POD,SOD activity showed the upward trend.Low PEG concentration promoted Toona sinensis young root growth,with the concentration increase,young root growth were strongly suppressed.

关 键 词：香椿种子 聚乙二醇 水分胁迫 种子萌发 生理生化指标 

分 类 号：S644.4[农业科学—蔬菜学]