精口恶唑禾草灵抗性及敏感菵草种群萌发条件的比较  

Comparison of Factors Affecting Seed Germination of Beckmannia syzigachne Resistant and Susceptible Populations to Fenoxaprop-p-ethyl

作　　者：艾萍[1] 吕波[2] 李俊[1] 董立尧[1,2] 

机构地区：[1]南京农业大学植物保护学院/农业部作物病虫害监测与防控重点开放实验室,江苏南京210095 [2]南京农业大学理学院/江苏省农药学重点实验室,江苏南京210095

出　　处：《杂草科学》2011年第2期36-39,共4页Weed Science

基　　金：国家自然科学基金(编号:30971928);国家博士点基金(编号:2009097120046)

摘　　要：为了比较对精口恶唑禾草灵抗性及敏感菵草种群在萌发特性上的差异,采用培养皿法研究了温度、光照、pH值、水势、盐胁迫对其萌发的影响。结果表明,pH值为4-10条件下,2个种群的萌发率无显著性差异;全光照条件下,抗性菵草的萌发率显著低于敏感菵草;10℃条件下,抗性菵草的萌发率显著低于敏感菵草;水势胁迫和盐分胁迫对抗性菵草萌发的影响大于敏感菵草,当水势为-0.5 MPa时,抗性菵草无萌发,敏感菵草萌发率为41.9%;当NaC l溶液浓度为160 mmol/L时,抗性菵草无萌发,敏感菵草的萌发率为51.7%。In order to investigate and compare the seed germination characteristics of Beckmannia syzigachne between the resistant and susceptible population to fenoxiaprop-p-ethyl,some factors affecting seed germination including temperture,light,pH value,water potential and NaCl stress have heen tested and evaluated via dish dipping method.The results showed that there was no significant difference to be found in seed germination rate between the resistant and susceptible population when pH values ranged from 4 to 10.Seed germination rate of the resistant population was signifcant lower than that of susceptible population under the whole light condition or at the temperature of 10 ℃.The inhibiting effect of water potential and NaCl stress on seed germination in the resistant population was higher than that of susceptible population.The germination in resistant population was completely inhibited under-0.5 MPa water potential,while the germination rate in susceptible population reached to 41.9%.The germination in resistant population was completely inhibited with 160 mmol/L NaCl treatment,while germination rate in the susceptible population reached to 51.7%.

关 键 词：菵草 温度 光照 PH值 水势 盐胁迫 萌发 

分 类 号：Q142[生物学—生态学]