摘要
尿囊素（Ａｌ．）和广增素（ＧＺＳ）３００ｍｇ／Ｌ浸种可促进水稻幼苗生长，但对根／冠比影响不明显。在５～１５℃低温胁迫下３ｄ，Ａｌ．与ＧＺＳ均能提高稻叶ＳＯＤ活力，保护质膜结构，使丙二醛（ＭＤＡ）累积与电解质渗漏显著减少。同时能提高叶片相对含水量，并保持叶表保护结构基本完好。回温（２３～２６℃）７ｄ后，Ａｌ．与ＧＺＳ处理组稻苗存活率大大高于ＣＫ组。
Rice seeds were soaked in 300 mg/L Allantoin(All.) and its compound Guangzengsu(GZS), the growth of rice seedlings was promoted, but didn't affact the root/shoot ratio significantly. Three days after chilling stress (5～15℃) treatment, the activity of SOD in All.or GZS treated leaves increased,the structure of plasma membrane remained undamaged, the content of MDA and the leakage of electrolytes decreased obviously. Meanwhile the relative content of water in leaves increased and the defensive structure of leaves' surface kept almost undamaged basically.Seven days after returned to the normal temperature(23～26℃), the survival rate of All. group and GZS group was signifccantly higher than the CK group.
关键词
尿囊素
广增素
水稻幼苗
低温胁迫
allantoin
guangzengsu
riceseedling
chillingstress
