盐碱胁迫对野生地肤种子发芽和幼苗生长的影响  

Effects of Saline-Alkali Stress on Seed Germination and Seedling Growth of Wild Wancomponents(Kochia scoparia(L.) Schrad)

作　　者：张慧蓉[1] 张建伟[1] 张兆沛[1] 吴金祥[1] 

机构地区：[1]河南科技学院,河南新乡453003

出　　处：《种子》2010年第1期15-19,共5页Seed

基　　金：河南省自然科学基金项目"设施主要蔬菜耐盐性研究"(0611031000)

摘　　要：将中性盐NaCl、Na2SO4和NaHCO3、Na2CO3两种碱性盐按不同比例混合,模拟出30种与天然盐碱土壤相似的条件,进行野生地肤种子发芽试验和幼苗生长情况检测等7项指标,结果表明:在混合盐碱胁迫作用下,地肤种子发芽受到明显抑制,发芽率、发芽势、发芽指数等指标呈下降趋势,并随盐碱度递增,下降程度逐渐增大,高盐高碱效应较单独高盐或高碱作用大;幼苗存活率和相对含水量在不同处理组间均呈下降趋势,而MDA和可溶性糖含量则随着盐碱度的升高逐渐上升,其中可溶性糖含量在低盐浓度(50、100 mmol/L)或低pH条件下,增加幅度小于高盐浓度(200、250 mmol/L)或高pH,两者具有明显的协同作用。The seeds of wild wancomponents （Kochia scoparia （L） Schrad） were tested under 30 kinds of mixed salt solutions composed of NaCl, Na2S04, NaHC03, Na2 CO3 at different proportions of salinity and alka- linity similar to natural saline-alkali soil. Seven indexes such as germination rate were determined. The results showed that the germination capability of wild wancomponents seeds was restrained obviously under complex saline-alkali stress. Complex saline-alkali stress decreased germination rate, germination energy and germina- tion index. With saline-alkali concentration increasing, the trend became more obvious. The mixed effect of high saline-alkali stress was much stronger than that of high salt stress or high alkali stress respectively. The survival rate and relative water content decreased among all the six different treated groups, but MDA and solu- ble sugar content increased gradually with saline-alkali degree increasing, and increasing range of soluble sugar under 50,100 mmol/L or low pH was lower than 200,250 mmol/L or high pH. So it played obvious coopera- tion role between saline and alkali stress.

关 键 词：野生地肤 盐碱胁迫 发芽指标 丙二醛 可溶性糖 

分 类 号：Q945.34[生物学—植物学]