对独脚金内酯(strigolactones,SLs)调控植物侧枝发育的分子机制及其与生长素相互作用的相关研究结果进行了总结和归纳,在此基础上提出今后的重点研究方向。相关的研究结果显示:在拟南芥[Arabidopsis thaliana(Linn.) Heynh.]、豌豆(Pisum sativum Linn.)和水稻(Oryza sativa Linn.) 等植物多枝突变体中SLs 作为可转导信号参与侧枝发育的分子调控,从这些植物中已克隆获得参与SLs 生物合成及信号应答途径的一些基因。作为一种植物激素,SLs 在侧枝发育调控网络中与生长素相互作用;腋芽发育与其中生长素的输出密切相关, SLs 通过调控芽中生长素的输出间接抑制腋芽发育和侧枝生长,而生长素则在SLs 生物合成中起调节作用。

The related research results about molecular mechanism of strigolactones (SLs) in regulating of plant lateral shoot development and interactions between SLs and auxin were summarized and induced, and on these bases, key research directions in future were put forward. The related research results show that taking as a transduced signal, SLs are involved in molecular regulation of lateral shoot development of high branching mutants of Arabidopsis thaliana (Linn.) Heynh., Pisum sativum Linn. and Oryza sativa Linn., etc, and some genes involved in biological synthesis and signal response ways of SLs are also cloned from these species. Taking as a phytohormone, SLs interacts with auxin in regulatory network of lateral shoot development. The axillary bud development closely relates to its auxin output, while SLs indirectly inhibits axillary bud development and lateral shoot growth through controlling auxin output in bud, and auxin plays a regulatory effect in strigolactones biosynthesis.