甘薯茎尖离体培养及植株再生体系建立
时间:2021-08-30 21:47 来源:毕业论文 作者:毕业论文 点击:次
摘要:实验选用徐薯18甘薯品种为材料,以MS为基本培养基,研究不同激素对甘薯茎尖培养的影响。结果表明,选用薯块催芽获得的茎尖成活率高于田间蔓尖;6-BA 0.5mg/L附加低浓度的IAA,有利于甘薯茎尖成活;MS+2.4-D 2.0mg/L比较适宜徐薯18茎尖生长。利用徐薯18进行了甘薯细胞悬浮培养及有效植株再生研究。将长约0.5mm的茎尖组织培养在添加2.0mg·L-1 2,4-D的MS培养基上,悬浮培养得到小细胞团转移到2,4-D培养基上,继续增殖并形成体细胞胚,转移到ABA培养基上,使体细胞胚进一步发育成植株。71514 毕业论文关键词:甘薯,茎尖培养,细胞悬浮培养,植株再生 Abstract:Sweet potato Xushu 18 was used as material and MS as base medium in this experimental to study the effect of different hormones on shoot tip culture of sweet potato. The results showed that the selection of sweet potato piece of germination of shoot tip survival rate is higher than the field tendril tip; 0.5mg/l 6-BA added low concentrations of IAA in the medium, is conducive to the sweet potato stem tip survival; MS supplemented with 2.0mg/l 2,4-D more appropriate Xushu 18 shoot tip growth. The suspension culture and effective plant regeneration of sweet potato were studied by using the sweet potato 18. The stem tip tissue of approximately 0.5mm was cultured on the MS culture medium supplemented with 2.0 mg•L-1 2,4-D. Then the small cell clusters were obtained by suspension culture, the small cell mass transfer to the 2,4-D culture medium to continue proliferation and the formation of somatic embryos, the final somatic embryos will be transferred to the ABA medium, so that the somatic embryo is further developed into plants. Key word: sweet potato, meristem culture; cell suspension culture; plant regeneration 目录 1 前言 4 2 材料与方法 4 2.1 实验材料 4 2.2 茎尖组织的获取 5 2.3 培养基配置及培养条件 5 2.4 胚性细胞悬浮培养系的建立 5 2.5 植株再生 5 3 结果与分析 6 3.1 甘薯外植体取材的来源对其茎尖培养的影响 6 3.2 6-BA与IAA对甘薯茎尖培养的影响 6 3.3 不同2.4-D浓度对甘薯茎尖生长的影响 6 3.4 细胞悬浮培养系的建立 7 3.5 植株再生 7 结论 9 参考文献 10 致谢 12 1 前言 甘薯(Ipomoen batatas L.Lam)原产于南美,自十六世纪引入中国后,至今已有几百年历史。甘薯是重要的粮食、饲料和工业原料作物,具有高产、稳产、适应性强,应用范围广的特点,然而由于甘薯病毒病的广泛存在,以及生产中甘薯进行无性繁殖,造成病毒病的蔓延,从而造成甘薯种性退化、品质下降、产量下降[1],同时甘薯资源保存也面临着绝种的威胁。论文网 甘薯广泛种植于我国的20多个省区,是我国四大粮食作物之一。其年种植面积约600万hm2,鲜薯总产量达1亿多吨[2],而每年因甘薯病毒病造成的损失高达40亿元[3-4]。国内外迄今尚未育出高抗病毒病的实用甘薯品种,也无防治病毒病的高效农药,因此利用茎尖分生组织培养培育脱毒甘薯苗是目前防治甘薯病毒、减缓甘薯种性退化的一项行之有效的重要措施。Nielsen[5]最早采用茎尖培养方法脱除了甘薯木栓病毒。目前通过茎尖培养获得的脱毒甘薯已经广泛地应用于生产,增产效果显著。能否成功地将这一新方法应用于甘薯改良,其关键是要建立甘薯细胞组织培养的有效植株再生系。 (责任编辑:qin) |