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核农学报  2014 

一个辐射诱变的水稻卷叶突变体的特性研究

DOI: 10.11869/j.issn.100-8551.2014.05.0757, PP. 757-764

Keywords: 水稻,卷叶突变体,IAA,色胺

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Abstract:

通过60Co-γ射线处理籼稻品种青华占的干种子,获得一个稳定遗传的卷叶突变体(γ-rl),对其进行叶片细胞学观察、根形态特性分析及生长素(IAA)和色胺含量的分析。结果显示卷叶突变体γ-rl叶片的中脉面积比野生型增加,而侧脉数目减少;突变体种子萌发后幼苗的主根长度比野生型显著缩短,根总数也显著减少,表明幼苗期γ-rl的根系发育明显差于野生型;突变体γ-rl幼苗的主根生长对外源IAA、IAA抑制剂NPA处理的反应与野生型相比也存在显著差异;在幼苗期,突变体γ-rl叶片内源IAA的含量明显低于野生型,而色胺的含量明显高于野生型,但在抽穗期,突变体γ-rl叶片的IAA和色胺含量与野生型相比均无显著差异。研究结果将为阐明该突变体卷叶突变产生的原因及卷叶相关基因(OsFMO(t))的功能打下基础。

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