盐胁迫和光照条件对矮牵牛种子发芽影响的研究
关键词：矮牵牛种子；光照和盐胁迫；发芽率
Study on the effect of salt stress and light conditions on Seed Germination of Petunia hybrid
Abstract: Petunia is suitable for the decoration of parterre, scenery spots and home. And it is a ornamental plant with high economic value. Up to now, salt stress is the main environmental factor that prevents plants from growing. The specific manifestation is the low germination rate, the late sprouting in spring, the bad growth and so on. Secondly, the growth of the plants can not leave photosynthesis. So it is of great importance of studying the factors of salt stress and light condition on the petunia. . The experiment of Petunia hybrida seeds in six sodium chloride concentrations (0、5、10、40、60、80mmol/L) and four kinds of light intensity (dark, light, light, weak light) analysis of germination condition after the treatment of salt stress and light on the germination effect. The results shows that with the increasing concentration of NaCl, Petunia seed germination potential and germination rate decrease under the force of salt. And root growth is significantly inhibited by salt stress, while the low concentration of salt treatment promots hypocotyl and cotyledon growth. Thus it shows the increasing weight of seeds. Under the light, along with the weakening illumination, Petunia seed germination potential and germination rate decreases, root growth is inhibited significantly under the weak light, and the hypocotyl and cotyledon in the dark condition is the best.
Keywords:Petunia seed; light and salt stress; germination rate
目录
1 引言 1
1.1 矮牵牛的用途 1
1.2 矮牵牛的生物学特性 1
1.3 种子萌发的意义 2
1.4 种子萌发所需的外界条件 2
1.5 盐对种子萌发的影响 3
1.5.1 植物抗盐性的调控 4
1. 6 光对种子萌发的诱导作用 4
1.6.1 光照胁迫对种子萌发的影响 5
1.7 本研究问题的提出及意义 6
2 实验过程 6
2.1 实验材料及所需器材 6
2.1.1 实验材料 6
2.1.2 实验器材 6
2.2 实验方法 7
2.2.1 盐胁迫组 7
2.2.2 光照组 7
2.2.3 计算公式 7
2.3实验研究假设 7
3 结果与分析 8
3.1 盐胁迫对矮牵牛种子萌发的影响 8
3.2光照对矮牵牛种子萌发的影响 9
4 讨论与结论 10
4.1盐胁迫对矮牵牛种子萌发的影响 10
4.2光照对矮牵牛种子萌发的影响 10