生物类毕业论文

存档日期：2010年6月存档编号：06241028本科生毕业论文（设计）论文题目：苋菜种子萌发特性的研究姓名：徐晨院系：生命科学学院专业：生物科学（师范）年级、班组：06生11指导教师：高侠莉徐州师范大学生命科学学院印制苋菜种子萌发特性的研究徐晨指导老师：高侠莉(徐州师范大学生命科学学院，江苏徐州221116)摘要：种子萌发是植物生活史中的关键性特征，它关系到幼苗的建成、存活、竞争和个体未来的适合度。因此，建立获取植物种子萌发特性的研究思路，掌握获取植物种子萌发特性的实验方法，可以快速地了解植物的特征，有效地促进或抑制植物的生长，以便应用于生活及生产实践，有助于取得更高的效率和更好的效果。在实验室条件下采用常规方法对苋菜种子萌发的生物学特性进行了初步研究。主要选取了三种苋菜种子进行实验，分别是皱果苋、凹头苋和反枝苋种子，根据它们在20℃、25℃、30℃条件下的萌发情况，分析了温度对种子萌发的影响，并与它们冷藏4年后的种子萌发情况进行了对比，分析了贮藏对种子萌发的影响。结果表明，皱果苋种子萌发的适宜温度在25℃左右，凹头苋种子萌发的适宜温度在25～30℃之间，反枝苋种子萌发的适宜温度在30℃以上，冷藏4年后的皱果苋种子的萌发率为零，冷藏4年后的凹头苋和反枝苋种子的萌发率增高了，尤其是反枝苋种子的萌发率更是显著增高。关键词：苋菜、种子萌发、休眠、温度、贮藏StudiesonSeedGerminationCharacteristicsofAmaranthXUChenSupervisor:GAOXiali(SchoolofLifeSciences,XuzhouNormalUniversity,Xuzhou,Jiangsu,221116,China)Abstract:Seedgerminationisakeyfeatureofplantspecies,itisrelatedtoseedlingestablishment,survival,competitionandindividualfitnessofthefuture.Therefore,establishedforseedgerminationcharacteristicsofideas,controlaccesstoseedgerminationcharacteristicsofexperimentalmethods,canquicklyunderstandthecharacteristicsofplants,andeffectivelypromoteorinhibitthegrowthofplants,inordertobeappliedtolifeandproductionpractice,helptoachievegreaterefficiencyandbetterresults.Thebiologicalcharacteristicsofamaranthseedgerminationhavebeenstudiedpreliminarilybyconventionalmethodsunderlaboratoryconditions.Itmainlyselectedthreetypesofamaranthseedstodoexperiments,wereWrinkled-fruitAmaranth,EmarginateAmaranthandCommonAmaranth,accordingtotheirgerminationconditionsunder20℃,25℃,30℃,analyzestheimpactoftemperatureonseedgerminationandComparedwiththeirgerminationconditionsoftheseedsbefrozen4years,analyzestheimpactofstorageonseedgermination.TheresultsshowedthattheseedgerminationsuitabletemperatureofWrinkled-fruitAmaranthisaround25℃,theseedgerminationsuitabletemperatureofEmarginateAmaranthisbetween25~30℃,theseedgerminationsuitabletemperatureCommonAmaranthofabove30℃,frozen4yearslater,theseedgerminationrateofWrinkled-fruitAmaranthiszero,frozenfouryearslater,theseedgerminationrateofEmarginateAmaranthandCommonAmaranthishigher,andinparticular,theseedgerminationrateofCommonAmaranthissignificantlyhigher.Keywords:Amaranth,SeedGermination,Dormancy,Temperature,Storage目录引言................................................................................11材料与方法............................................................................................................................................21.1试验材料.................................................................................................................................................21.2仪器设备.................................................................................................................................................21.3试验设计................................................................................................................................................21.3.1试验操作...........................................................................................................................................21.3.2数据整理...........................................................................................................................................21.3.3统计分析...........................................................................................................................................32结果与分析............................................................................................................................................32.1同一品种不同温度的发芽动态......................................................................................................32.1.1不同温度处理对皱果苋种子萌发的影响.....................................................................................32.1.2不同温度处理对凹头苋种子萌发的影响.....................................................................................32.1.3不同温度处理对反枝苋种子萌发的影响.....................................................................................42.2同一温度不同品种的发芽动态......................................................................................................42.2.120℃处理对不同种子萌发的影响.................................................................................................42.2.225℃处理对不同种子萌发的影响.................................................................................................52.2.330℃处理对不同种子萌发的影响.................................................................................................52.3冷藏四年后不同种子的发芽动态.................................................................................................63小结与讨论............................................................................................................................................6致谢......................................................................................................................................................................7参考文献..........................................................................................................................................................71引言苋菜（AmaranthusmangostanusL.）别名千穗谷、西