School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
Transgenic Res. 2024 Oct;33(5):293-296. doi: 10.1007/s11248-024-00409-6. Epub 2024 Sep 17.
The study by Zheng et al. (2024) identifies a NAC transcription factor, SOMBRERO (SMB), localized in the root cap of Arabidopsis, which is essential for root halotropism. SMB influences root halotropism by establishing asymmetric auxin distribution in the lateral root cap (LRC) and maintaining the expression of the auxin influx carrier gene AUX1. This mechanism leads to directional root bending away from high salinity areas. The findings reveal the SMB-AUX1-auxin module as a crucial mediator in root cap signaling and root halotropic response.
郑等人（2024）的研究确定了一个 NAC 转录因子，SOMBRERO（SMB），位于拟南芥的根冠中，对于根的向盐性至关重要。SMB 通过在侧根冠（LRC）中建立不对称的生长素分布并维持生长素流入载体基因 AUX1 的表达来影响根的向盐性。这种机制导致根弯曲远离高盐区域。这些发现揭示了 SMB-AUX1-生长素模块作为根冠信号和根向盐性反应的关键介质。
