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水稻(Oryza sativa)作为世界上最主要的粮食作物之一,对其主要农艺性状调控机理的研究具有重要意义。分蘖是水稻生长发育过程中一种特殊的分枝,它不仅是与水稻产量密切相关的重要农艺性状,也是揭示高等植物侧枝生长发育机制的理想模型。独脚金内酯(strigolactone,SL)是一类新型植物激素,能够抑制植物分枝的生长发育。近年来,关于SL合成与信号在调控水稻分蘖方面的研究取得了重要进展,但对其信号转导的下游组分的研究还相对匮乏。该文综述了SL合成途径、信号途径及下游靶基因调控水稻分蘖的研究进展,并与在拟南芥(Arabidopsis thaliana)、豌豆(Pisum sativum)和矮牵牛(Petunia hybrida)中的研究进行了比较,同时还对如何挖掘SL途径的新组分进行了讨论。
Oryza sativa, as one of the most important food crops in the world, is of great significance for the study of the regulation mechanism of its main agronomic traits. Tillering is a special branch in the process of rice growth and development. It is not only an important agronomic trait closely related to rice yield, but also an ideal model for revealing the growth and development of higher plants. Strigolactone (SL) is a new class of plant hormones that can inhibit the growth of plant branches. In recent years, significant progress has been made in the research of SL synthesis and signal regulation in tillering of rice, but the research on its downstream components of signal transduction is relatively scarce. This review summarizes the progress in the regulation of tillering of rice by the pathways of SL synthesis, signaling and downstream target genes and has been reviewed in studies with Arabidopsis thaliana, Pisum sativum and Petunia hybrida Comparison, but also on how to tap the new components of the SL pathway were discussed.