摘要
采用水培溶液添加PEG6000模拟干旱胁迫的方式,研究了化学调控物质浸种对不同程度水分胁迫下小麦根系及幼苗生长影响。结果表明,水分胁迫不同程度地降低了小麦幼苗的株高、叶面积、地上部及根的干重、根系活力、SOD、POD活性等,并明显增加了根系MDA含量水平。化学调控物质浸种处理可以增加各种条件下小麦的总根长、叶面积、根活力及SOD与POD活性,且表现出在干旱胁迫下增加幅度高于正常处理的现象。化学调控物质浸种有利于缓解干旱胁迫带来的不良影响。利用FA、GA、MET及稀土等化学调控物质浸种具有促进根系生长、培育小麦壮苗的突出作用。图3,表2,参14。
An experiment using polyethylene glycol （PEG6000） to induce water stresses was carried out to evaluate the effects of soaked seed with different chemical regulators on the seedling and root growth of wheat. The result showed that： （1）Comparing with the control group, the wheat seedling under different water stress has small height.And the area of leaf, dry weight of stem, leaf and root,root vigor,POD and SOD activities decreased drastically. The MDA content of root increased significantly at the same time. （2）soaked Seed with the chemical regulators increased the total root length, leaf area, root vigor and the activity of SOD and POD, and this increase under water stresses was remarkably higher than that under normal condition. And therefore, the detrimental effects resulting from the water stress were decreased. （3）Soaked seeds with FA or GA or MET or rare earths could play an important role in raising healthy wheat seedlings.
出处
《农业系统科学与综合研究》
CSCD
2007年第2期201-204,211,共5页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家高技术研究发展计划(2002AA241161)
山西省自然基金项目(2006011086)
关键词
水分胁迫
化学调控物质
浸种
小麦根系
幼苗生长
water stress
soaked seed
chemical regulators
wheat roots
seedling growth
