培养基中CuSO4和Fe盐对小麦胚培养再生效果的影响
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国家自然科学基金项目(面上项目,重点项目,重大项目)、国家转基因专项


Effects of CuSO4 and Iron Source on the Tissue Culture of Wheat
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan),The National Transgenic Special Foundation of China

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    摘要:

    Fe和Cu是植物组织培养中不可缺少的成分,作为金属离子螯合剂与植物生长发育中一些关键酶的活性密切相关。优化培养基中Fe和Cu离子的浓度可提高组织培养再生效率,对建立小麦高效遗传转化体系有一定意义。本研究以小麦基因型CB037、新春9号和Bobwhite为材料进行成熟胚和幼胚培养,研究了CuSO4和Fe2-EDTA对小麦组织培养再生效果的影响。结果发现,培养基中添加0.1~4.1 祄ol L-1 CuSO4对小麦成熟胚组织培养无显著效果,超过6.1 祄ol L-1对愈伤组织有毒害作用;培养基中添加40 祄ol L-1 Fe盐对小麦成熟胚组织培养和植株再生具有促进作用;不同小麦基因型其幼胚培养对Fe盐的反应不同,40 祄ol L-1~50 祄ol L-1 Fe盐处理对CB037幼胚再生效果最好,20 祄ol L-1 Fe盐浓度对新春9号和Bobwhite幼胚再生效果好,高浓度铁盐抑制作用显著;在相同培养条件下,CB037幼胚再生率最高,新春9号次之,Bobwhite最低。

    Abstract:

    To optimize the concentrations of CuSO4 and iron source used in wheat embryo culture, investigation on the influence of Fe and Cu ions in culture media on wheat regeneration was performed using CB037, Xinchun9, and Bobwhite as materials. The results showed that the the efficiencies of embryogenic callus induction and green shoot induction has not difference when the concentration of CuSO4 was from 0.1 to 4.1 祄ol L-1, and 6.1 祄ol L-1 was toxic for mature embryos of wheat. Regeneration efficiency from the mature embryos of CB037 was obviously improved on the media containing 40 祄ol L-1 iron source. The optimal concentration of iron source were 40 to 50 祄ol L-1 when the immature embryos of CB037 were used as explants, both of callus differentiation and green shoots induction in this level were higher than them in the level of 20 祄ol L-1(at random). For the immature embryo culture of Xinchun9 and Bobwhite, the ideal concentration of iron source was 20 祄ol L-1. The sensibility of different genotypes to iron source is discrepant. In average, the order for regeneration potential of immature embryos among the three wheat genotypes used in this study is CB037, Xinchun 9 and Bobwhite.

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别晓敏,杜丽璞,徐惠君,等.培养基中CuSO4和Fe盐对小麦胚培养再生效果的影响[J].植物遗传资源学报,2011,12(6):975-981.

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  • 收稿日期:2011-01-25
  • 最后修改日期:2011-03-30
  • 录用日期:2011-05-04
  • 在线发布日期: 2011-09-19
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