【摘要】 用纸床培养,通过测定萌发率、胚根长、胚芽长、鲜重等生物量指标及各项生理生化指标的方法探究了不同浓度NaCl(0 mmol/L、25 mmol/L、50 mmol/L、100 mmol/L、150 mmol/L、200 mmol/L)胁迫对特大叶荆芥幼苗种子萌发及幼苗生长的影响。结果表明:NaCl胁迫对荆芥种子萌发率无明显影响,而荆芥根长、芽长、鲜重、子叶展开数和种皮脱落数等均随浓度的增加呈下降趋势,当胁迫浓度≥100 mmol/L时抑制极为显著。SOD和POD活性在25 mmol/L的NaCl胁迫浓度下较对照组升高,而在其后的胁迫浓度下均较对照组低,阴离子氧生成量表现出相应的先下降后上升的趋势。更多还原

【Abstract】 By the method of filter paper cultivation,some biomass indexes including germination rate,radical length,germ length,fresh weight and some physiological indexes were studied to explore the influence of NaCl( 0 mmol / L,and 25 mmol / L,and50 mmol / L,and 100 mmol / L,and 150 mmol / L,and 200 mmol / L) stress on seed germination and seedling growth of Nepeta cataria L.. The results showed that effects on seed germination rate was not significant under NaCl( 0 mmol / L,and 25 mmol / L,and 50 mmol / L,and 100 mmol / L,and 150 mmol / L,and 200 mmol / L) stress,while these indexes including root length,bud length,fresh weight,the number of cotyledons opened and seed coat drop decreased with the increasing of NaCl concentration,when the concentrations is higher than 100 mmol / L the inhibition was significant. When concentration of NaCl was 25 mmol / L,SOD and POD activity was higher than the control group,while under subsequent stress,concentration activity was lower than the control group,and the anionic oxygen generation showed a corresponding upward trend after the first drop.更多还原