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首页> 外文期刊>Journal of Experimental Botany >Phytohormone signalling pathways interact with sugars during seed germination and seedling development
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Phytohormone signalling pathways interact with sugars during seed germination and seedling development

机译：植物激素信号传导途径在种子发芽和幼苗发育过程中与糖相互作用

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Exogenous glucose delays seed germination in Arabidopsis thaliana not only in wild type (WT), but also in a number of mutants in hormone signalling pathways. This study demonstrates that the ABA Insensitive 3 (ABI3) gene in the ABA signalling pathway and the RGA-like 2 (RGL2) and SPINDLY (SPY) genes in the GA signalling pathways all play important roles in the glucose-induced delay of seed germination. Transcription of the ABI3 and RGL2 genes is up-regulated by glucose. This study also supports the idea that different sugars such as the hexose stereoisomers, glucose, and mannose, delay or inhibit seed germination via different branches of the hormone signalling pathways. Analysis of post-germination seedling development of wild-type plants indicates that exogenous glucose supplied after germination may have a concentration-dependent stimulatory effect on root and shoot growth. Comparison of WT and spy seedling growth on different glucose concentrations suggests that the stimulatory effect of glucose is partially exerted via the GA or cytokinin signalling pathways. The effects of glucose on plant growth and development may be stimulatory or inhibitory depending on the developmental stage. The inhibitory effect on seed germination seems to be accomplished via the activation of the ABA signalling pathway, through ABI3, and inactivation of the GA signalling pathway through RGL2 and SPY. On the other hand, the stimulatory effect of glucose on seedling growth may involve the GA and/or cytokinin signalling pathways.
机译：外源葡萄糖不仅延迟野生型（WT）的拟南芥种子的萌发，而且延迟激素信号传导途径中的许多突变体的种子发芽。这项研究表明，ABA信号通路中的ABA不敏感3（ABI3）基因以及GA信号通路中的RGA-like 2（RGL2）和SPINDLY（SPY）基因均在葡萄糖诱导的种子萌发延迟中起重要作用。 。葡萄糖上调ABI3和RGL2基因的转录。这项研究还支持这样的想法，即不同的糖（如己糖立体异构体，葡萄糖和甘露糖）会通过激素信号传导途径的不同分支延迟或抑制种子发芽。对野生型植物发芽后幼苗发育的分析表明，发芽后供应的外源葡萄糖可能对根和芽的生长具有浓度依赖性的刺激作用。 WT和间谍苗在不同葡萄糖浓度下的生长比较表明，葡萄糖的刺激作用部分通过GA或细胞分裂素信号传导途径发挥。葡萄糖对植物生长和发育的影响可能取决于发育阶段，可能是刺激性的或抑制性的。对种子萌发的抑制作用似乎是通过ABA信号通路的激活，通过ABI3以及GA信号通路的抑制通过RGL2和SPY来实现的。另一方面，葡萄糖对幼苗生长的刺激作用可能涉及GA和/或细胞分裂素信号传导途径。

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