水分胁迫对圆叶决明生理生化特性的影响  

Effect on Physiological and Biochemical Charateristics in Chamaecrista Rotundifolia Under Water Stress

作　　者：任丽花[1,2] 王义祥[3] 罗旭辉[3] 翁伯琦[3] 

机构地区：[1]福建省农业科学院中心实验室,福建福州350003 [2]福建省精密仪器农业测试重点实验室,福建福州350003 [3]福建省农业科学院农业生态研究所/农业部福州农业环境科学观测实验站,福建福州350003

出　　处：《福建农业学报》2013年第11期1093-1098,共6页Fujian Journal of Agricultural Sciences

基　　金："十二五"国家科技支撑计划(2012BAD14B15);福建省科技计划重大专项(2012NZ0002);福建省科技计划项目--省属公益类科研院所基本科研专项(2011R1027-2)

摘　　要：运用聚乙二醇(PEG-6000)模拟水分胁迫,研究水分胁迫下CPI86134幼苗叶片若干生理生化指标的变化情况。结果表明:随着胁迫程度的加重,圆叶决明叶片相对含水量减小,叶片叶绿素含量增加,渗透调节物质增加,作为细胞保护酶的SOD、POD活性均升高,同时,细胞膜受到伤害,膜透性增加,作为膜脂过氧化产物的丙二醛含量也随之增加;随着胁迫时间的延长,POD活性先升高后降低,说明干旱胁迫下细胞保护酶活性升高,但当胁迫超出了植物可以忍耐的程度后,酶活性降低。The effects of water stress on several physiobiochemical indexes of Chamaecrista rotundifolia under PEG- 6000 treatment were studied in a series laboratory tests. The results showed that the RWC was decreased, the content of Chl and osmotic adjustment matter were raised, the activity of SOD and POD were increased, meanwhile, the cell membrane systems of mulberry were damaged and osmotic capability was boosted, relative electric conductivity and MDA content were increased along with the increasing of water stress. Furthermore, along with the time prolonged of water stress, the activity of POD was increased at first and then decreased, demonstrated that the activity of cell protective enzymes was increased under drought stress, but then decreased with the heavier stress to exceed the endurance for Chamaecrista rotundifolia.

关 键 词：水分胁迫 圆叶决明 生理生化特性 聚乙二醇 

分 类 号：Q945.1[生物学—植物学]