摘  要：本实验采用不同浓度的肌醇和Ca2+协同作用，在小麦幼苗期进行处理，研究其对小麦幼苗的生长发育促进作用。研究结果表明：肌醇和Ca2+协同能促进小麦幼苗生长发育。在处理Ⅱ时与对照比小麦幼苗的叶片鲜重增加了18.75%、干重增加了9.36%，根系鲜重增加了25.49%、干重增加了33.76%，根系活力提高了41.63%，可溶性糖含量增加了23.31%，叶绿素含量提高了36.84%，SOD活性提高了5.04%，POD活性提高了16.67%，MDA含量降低了31.73%。由此可见，在肌醇浓度为2.5mg/L，Ca2+浓度为500mg/L时,两者协同对小麦生长发育具有最好的促进作用。54028

毕业论文关键词：小麦幼苗,肌醇, Ca2+,协同作用

Abstract: The synergistic promote effect of different concentration of inositol and Ca2+ on wheat seedlings was studied in this experiment. The results showed that the growth and development of wheat seedling was obviously enhanced after treatment with mixture of inositol and Ca2+.The best was treatmentⅡ. The fresh weights of leaves were increased by 18.75%, the dry weights of leaves were increased by 9.36%, the fresh weights of roots were increased by 25.49%, the dry weights of roots were increased by 33.76%. And root vigor and soluble sugar content in wheat seedlings were increased by 41.63% and 23.31% respectively, and the contents of chlorophyll, activities of SOD, POD were increased by36.84%, 5.04%and16.67% respectively. Meanwhile the content of MDA was decreased by31.73%. The conclusion was that the best concentration in mixture inositol was 2.5mg/L and Ca2+ was 500mg/L.

Keywords : wheat seedling, inositol, Ca2+, synergistic effect 

目  录

1 引言 4

1.1 肌醇的植物生理功能研究概况 4

1.2 Ca2+的植物生理功能研究概况 5

1.3 小麦幼苗素质的有关指标 5

1.4 本实验探究的目的意义 6

2材料与方法 6

2.1材料 6

2.2试验方法 6

2.3测定项目及方法 7

2.4数据的统计分析方法 7

3结果与分析 7

3.1不同处理对小麦幼苗干重、鲜重的影响 7

3.2不同处理对小麦根系活力的影响 8

3.3不同处理对小麦幼苗叶绿素含量的影响 9

3.4不同处理对小麦幼苗MDA含量的影响 10

3.5不同处理对小麦幼苗SOD活性的影响 11

3.6不同处理对小麦幼苗POD活性的影响 12

3.7不同处理对小麦幼苗可溶性糖含量的影响 12

小   结 14

参考文献 15

致   谢 17

1 引言

小麦是世界第一大粮食作物，是人类重要的粮食作物，属于三大谷物之一，产量几乎全作食用，仅约有六分之一作为饲料使用。全世界有43个国家，有35%-40%的人口以小麦为主要粮食。据联合国粮农组织数据库统计，世界小麦常年产量为5.8亿吨左右。我国小麦种植面积约3 ×107hm2 ,总产量约占粮食作物总产量的25%以上[1]，是世界上唯一小麦总产量超过一亿吨的国家，位居世界第一。当前我国麦区采用的种植方式主要有四种：等行距窄幅条播，宽辐条播，宽窄行条播和小窝密播。如何提高小麦幼苗的品质，是小麦高产稳产的前提。本研究旨在采用肌醇和Ca2+协同作用来调控小麦幼苗的生长发育，达到提高小麦幼苗素质的能力，打好小麦稳产高产的基础。