盐胁迫对假苇拂子茅种子萌发的影响VIP免费

伊犁师范学院化学与生物科学学院2013届学士学位论文（设计）论文题目：盐胁迫对假苇拂子茅种子萌发的影响作者姓名：艾克热木·吐尔地班级：生物科学09-2专业：生物科学学号：09070401044指导教师：赵玉院系：化学与生物科学学院完成时间：2013年5月目录目录...............................................................I摘要..............................................................IIIAbstract...........................................................IV1.前言.............................................................11.1盐胁迫对种子萌发影响的研究进展...............................11.2假苇拂子茅概述...............................................21.3研究意义....................................................32.材料与方法.......................................................42.1材料.........................................................42.2试验方法.....................................................42.3数据的处理和测定方法：.......................................43．结果与分析.......................................................63．1NaHCO3胁迫对假苇拂子茅种子萌发的影响.......................63.1.1NaHCO3胁迫对种子发芽率的影响..........................63.1.2NaHCO3胁迫对种子发芽势的影响..........................63.1.3NaHCO3胁迫对种子发芽指数的影向........................73.1.4NaHCO3胁迫对种子根冠的影响............................83.2Na2CO3胁迫对假苇拂子茅种子萌发的影响.........................93.2.1Na2CO3对种子发芽率的影响...............................93.2.2Na2CO3对种子发芽势的影响..............................103.2.3Na2CO3胁迫对种子发芽指数的影响........................113.2.4Na2CO3胁迫对种子根冠长度的影响........................123.3NaCl胁迫对种子萌发的影响...................................133.3.1NaCl对种子发芽率的影响...............................133.3.2NaCl对种子发芽势的影响...............................143.3.3NaCl对种子发芽指数的影响.............................153.3.4NaCl对假苇拂子茅种子根冠的影响.......................164.结论.............................................................18参考文献：.........................................................19致谢...............................................................20摘要本研究以假苇拂子茅为实验材料，通过不同胁迫梯度的NaCl，Na2CO3和NaHCO3溶液处理假苇拂子茅的种子,并以蒸馏水处理的种子为对照，探讨不同浓度的盐水对相同条件下的假苇拂子茅种子的发芽率、发芽势、发芽指数以及根芽生长的影响。测定分析结果表明:碱性盐Na2CO3和NaHCO3胁迫比中性盐NaCl胁迫显著降低了假苇拂子茅种子的发芽率。因此，假苇拂子茅种子对中性盐NaCl的耐盐性最强。随着NaCl浓度的增加，假苇拂子茅种子的胚芽长和胚根长逐渐下降，而Na2CO3和NaHCO3胁迫下下降速度更快。碱性盐Na2CO3和NaHCO3胁迫下的假苇拂子茅种子胚根胚芽的受抑制大小顺序为：胚根>胚芽；而中性盐NaCl胁迫下其结果为：胚根>胚芽。关键词：假苇拂子茅；盐胁迫；种子萌发；发芽率；发芽势；根芽比AbstractInthisstudy,Calamagrostispseudophragmitesasexperimentalmaterial,throughdifferentstressgradientandNaCl,Na2CO3andNaHCO3solutiontreatedCalamagrostispseudophragmitesseed,andtheseedtreatedwithdistilledwaterascontrol,theeffectofdifferentconcentrationofbrinefalsereedblowinginunderthesameconditions,thegerminationrateofMaoseedgerminationpotential,germinationindexandrootgrowth.Theresultsshowedthat:alkalinesaltNa2CO3andNaHCO3stressthanneutralsaltstressofNaClsignificantlyreducedthegerminationrateofCalamagrostispseudophragmitesseeds.Therefor...