Planta ( IF 3.6 ) Pub Date : 2024-03-05 , DOI: 10.1007/s00425-024-04357-7
Yue Yang 1, 2 , Ziyun Ren 1, 2 , Lei Li 1, 2 , Yu Li 1, 2 , Yi Han 1, 2, 3 , Yongxiu Liu 1, 2, 4 , Hong Cao 1, 4
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Main conclusion
WOX family gene WOX2 is highly expressed during seed development, which functions redundantly with WOX1 and WOX4 to positively regulate seed germination.
Abstract
WOX (WUSCHEL-related homeobox) is a family of transcription factors in plants. They play essential roles in the regulation of plant growth and development, but their function in seed germination is not well understood. In this report, we show that WOX1, WOX2, and WOX4 are close homologues in Arabidopsis. WOX2 has a redundant function with WOX1 and WOX4, respectively, in seed germination. WOX2 is highly expressed during seed development, from the globular embryonic stage to mature dry seeds, and its expression is decreased after germination. Loss of function single mutant wox2, and double mutants wox1 wox2 and wox2 wox4-1 show decreased germination speed. WOX2 and WOX4 are essential for hypocotyl–radicle zone elongation during germination, potentially by promoting the expression of cell wall-related genes. We also found that WOX2 and WOX4 regulate germination through the gibberellin (GA) pathway. These results suggest that WOX2 and WOX4 integrate the GA pathway and downstream cell wall-related genes during germination.
中文翻译：
WOX2 与 WOX1 和 WOX4 冗余地发挥作用，积极调节拟南芥种子萌发
主要结论
WOX家族基因WOX2在种子发育过程中高表达，与WOX1和WOX4冗余发挥作用，正向调节种子萌发。
抽象的
WOX（WUSCHEL 相关同源框）是植物中的转录因子家族。它们在调节植物生长和发育中发挥着重要作用，但它们在种子萌发中的功能尚不清楚。在本报告中，我们表明 WOX1、WOX2 和 WOX4 是拟南芥中的密切同源物。 WOX2 在种子萌发过程中分别与 WOX1 和 WOX4 具有冗余功能。 WOX2在种子发育过程中高表达，从球状胚阶段到成熟干燥种子，其表达在萌发后下降。功能丧失的单突变体wox2和双突变体wox1 wox2和wox2 wox4-1显示发芽速度降低。 WOX2 和 WOX4 对于发芽过程中下胚轴-胚根区的伸长至关重要，可能是通过促进细胞壁相关基因的表达来实现的。我们还发现 WOX2 和 WOX4 通过赤霉素 (GA) 途径调节萌发。这些结果表明WOX2和WOX4在萌发过程中整合了GA途径和下游细胞壁相关基因。
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