水土保持研究2011，Vol.18Issue(3)：221-225,5.
PEG胁迫对沙冬青种子萌发过程的影响
Effects of PEG Stress on Seed Germination of Ammopiptanthus mongolicus
摘要
Abstract
The effects on seed germination of Ammopiptanthus mongolicus and the change law of soluble protein, proline, MDA, SOD, POD, CAT of seedlings were discussed. 5 different polyethylene glycol (PEG) mass concentrations from 5％ to 25％ were designed in this study by stimulating drought stress and the osmotic potentials in soil were -0.054 MPa, -0. 177 MPa, -0.393 MPa, -0. 735 MPa, -1.25 MPa. The results showed that the germination rate of Ammopiptanthus mongolicus seeds decreased with increase of PEG concentration, while the death rate increased, and the fresh weights of seedlings decreased by different degrees. The relative electrical conductivity and the MDA content were consistantly rising. The chang of soluble protein content and proline content were similar, all first increased (5 ％ ～ 15 ％) then decreased (20％and 25％). When treated with 15％ PEG, the seedlings were influenced and when PEG concentration was more than 20％, the seedlings were severely influenced.关键词
沙冬青/PEG胁迫/种子萌发Key words
Ammnopiptanthus mongolicus/ PEG stress/ seed germination分类
农业科技引用本文复制引用
段慧荣,李毅,马彦军..PEG胁迫对沙冬青种子萌发过程的影响[J].水土保持研究,2011,18(3):221-225,5.基金项目
科技部农业成果转化项目(2009GF32G100375) （2009GF32G100375）
