PEG对翅荚决明种子萌发和幼苗生长的影响  

Effect of Seed Germination and Seedling Growth of Cassia Alata L. after PEG

作　　者：廖友媛[1,2] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]湖南工业大学,湖南株洲412008

出　　处：《湖南工业大学学报》2009年第2期24-27,共4页Journal of Hunan University of Technology

摘　　要：对PEG处理后的翅荚决明种子萌发和幼苗生长的相关生理指标进行了测试,结果表明:与对照相比,吸胀种子在不同质量分数PEG溶液中萌发的发芽率均有所下降,且质量分数越大,其对种子萌发的抑制作用越显著;幼苗在不同质量分数PEG溶液中培养后,其质膜相对透性、丙二醛含量随PEG溶液质量分数的增加呈递增趋势,而叶绿素含量呈先升后降的变化趋势,净光合速率(Pn)随PEG溶液质量分数的增加而递减。The physiological irides of seed germination and seedling growth of Cassia alata L. after PEG treatment were tested. The result showed that all different quality concentrations of PEG treatments reduced the germination percentage, and the restriction efficiency increased with the increasing of concentration. The cultivation tests of seedlings in PEG solutions of different quality concentrations showed that the membrane permeability and malonaldehyde content increased with the increasing of PEG concentration, however, the chlorophyll content of the seeding leaves increased at first but then decreased, while the Pn decreased.

关 键 词：聚乙二醇 翅荚决明 种子萌发 幼苗生长 干旱胁迫 

分 类 号：Q945[生物学—植物学]