甘肃农业科技
甘肅農業科技
감숙농업과기
GANSU AGRICULTURAL SCIENCE AND TECHNOLOGY
2014年
8期
25-27,28
,共4页
PEG 干旱胁迫%种子萌发%幼苗生长%亚麻
PEG 榦旱脅迫%種子萌髮%幼苗生長%亞痳
PEG 간한협박%충자맹발%유묘생장%아마
PEG drought stress%Seed germination%Seedling growth%Linum usitatissium
采用不同PEG浓度模拟干旱条件，对亚麻品种陇亚8号种子萌发及幼苗进行胁迫。结果表明，在较低PEG浓度下（20%），亚麻种子萌发率、幼苗茎叶鲜重、主根长度、幼苗色素浓度显著下降，叶片MDA积累量显著升高，侧根数目增多，叶片内可溶性糖含量增加；随着PEG浓度增加，亚麻种子萌发率、幼苗茎叶鲜重下降趋缓，叶片MDA积累量上升趋缓，主根长度、色素浓度下降，侧根明显增多，叶片可溶性糖含量提高。
採用不同PEG濃度模擬榦旱條件，對亞痳品種隴亞8號種子萌髮及幼苗進行脅迫。結果錶明，在較低PEG濃度下（20%），亞痳種子萌髮率、幼苗莖葉鮮重、主根長度、幼苗色素濃度顯著下降，葉片MDA積纍量顯著升高，側根數目增多，葉片內可溶性糖含量增加；隨著PEG濃度增加，亞痳種子萌髮率、幼苗莖葉鮮重下降趨緩，葉片MDA積纍量上升趨緩，主根長度、色素濃度下降，側根明顯增多，葉片可溶性糖含量提高。
채용불동PEG농도모의간한조건，대아마품충롱아8호충자맹발급유묘진행협박。결과표명，재교저PEG농도하（20%），아마충자맹발솔、유묘경협선중、주근장도、유묘색소농도현저하강，협편MDA적루량현저승고，측근수목증다，협편내가용성당함량증가；수착PEG농도증가，아마충자맹발솔、유묘경협선중하강추완，협편MDA적루량상승추완，주근장도、색소농도하강，측근명현증다，협편가용성당함량제고。
Three PEG-6000 concentrations (20%,25% and 30%)simulated drought stress were used in this study to test its influence on the seed germination and seedling growth characters of Linum usitatissium L. ( Longya-8). The results showed that the seed germination rate declined rapidly at the 20% PEG concentration,and as well as the seedling total weight of stems and leaves, taproot length and the pigment concentrations,and the MDA concentration increased rapidly,indicating a serious adverse effect of drought stress at 20% PEG concentration to Linum usitatissium L. seed germination and seedling growth. Along with the rising PEG concentration,the lateral root numbers and the soluble sugar contents increased. The results indicated that Linum usitatissium L. may enhance its drought resisting ability by increasing the lateral root numbers and leaf soluble sugar contents at drought stress.
