独角金内酯调控水稻分蘖芽休眠的研究进展

Advances in Strigolactones Regulating the Dormancy of Rice Tiller Bud

化学控制无效分蘖是水稻高产栽培的研究热点和努力方向,但目前为止还没有发现合适的化学调控剂,独角金内酯是最近才被发现的一种激素或前体,已被证明参与了水稻分蘖的调控,但其调控机理和信号转导途径尚不明确。本研究归纳总结了独角金内酯对水稻分蘖的调控作用、其合成及信号转导过程以及其调控水稻分蘖发生的作用机制等方面的研究进展,认为独角金内酯能较好地抑制水稻分蘖发生,并可能通过抑制分蘖芽中生长素的外输以及进入分蘖芽中直接参与抑制腋芽生长两条途径来发挥作用,另外,本研究还对其中存在的争议问题进行了探讨,并展望了独角金内酯在水稻大田生产中调控分蘖发生的应用前景。

Chemical control of the ineffective tillering in high-yield rice cultivation has been the hotspot and the future research direction.However,the appropriate chemical regulator has not been found yet.Strigolactones are newly discovered hormone precursors and have been shown in the regulation of rice tillering,while the regulation mechanism and signal transduction pathways of strigolactones are still unclear.In this study,the author summarized the regulation of strigolactones on rice tillering,the synthesis and signal transduction pathway of strigolactones,and the mechanism of strigolactones in controlling rice tillering.It is considered that strigolactones are able to inhibit the tillering of rice,and it might play a role in two pathways,by preventing auxin export in tiller buds or inhibiting buds outgrowth through directly entering tiller buds.The author also discussed current problems in the research,and proposed the application prospect of strigolactones regulating the tillering in field production of rice.