Department of Biological Sciences; Graduate School of Science; The University of Tokyo; Bunkyo-ku, Tokyo, Japan.
Plant Signal Behav. 2012 Sep 1;7(9):1118-20. doi: 10.4161/psb.21307. Epub 2012 Aug 17.
The trans-Golgi network (TGN) contains multiple sorting domains and acts as the compartment for cargo sorting. Recent evidence indicates that the TGN also functions as an early endosome, the first compartment in the endocytic pathway in plants. The SYP4 group, plant Qa-SNAREs localized on the TGN, regulates both secretory and vacuolar transport pathways. Consistent with a secretory role, SYP4 proteins are required for extracellular resistance to fungal pathogens. However, the physiological role of SYP4 in abiotic stress remains unknown. Here, we report the phenotypes of a syp4-mutant in regard to salinity and osmotic response, and describe the physiological roles of the SYP4 group in the abiotic stress response.
高尔基体内网络（TGN）包含多个分拣结构域，作为货物分拣的隔室。最近的证据表明，TGN 还充当早期内体，即植物胞吞途径中的第一个隔室。植物 Qa-SNARE 定位于 TGN 的 SYP4 组调节分泌和液泡运输途径。与分泌作用一致，SYP4 蛋白对于抵抗真菌病原体的细胞外抗性是必需的。然而，SYP4 在非生物胁迫中的生理作用仍然未知。在这里，我们报告了 syp4 突变体在盐度和渗透响应方面的表型，并描述了 SYP4 组在非生物胁迫响应中的生理作用。
