The RAX1 and RAX3 expression domains specifically mark a cell group in the center of the leaf axil from which the axillary meristem develops. Double mutant combinations of lateral suppressor and rax1-3 as well as expression studies suggest that at least two pathways control the initiation of axillary meristems in Arabidopsis.

2006年2月8日 · RAX1和RAX3表达域专门标记了腋生分生组织从其形成的叶腋中心的细胞群。 横向抑制子和rax1-3的双重突变体组合以及表达研究表明，至少有两种途径控制拟南芥中腋生分生组织的启动。 Blind homologous R2R3 Myb genes control the pattern of lateral meristem initiation in Arabidopsis. In seed plants, shoot branching is initiated during postembryonic development by the formation of secondary meristems.

We demonstrate that EXB1 controls AM initiation by positively regulating the transcription of RAX1, RAX2, and RAX3. Disruption of the RAX genes partially rescues the branching phenotype caused by EXB1 overexpression. We further show that EXB1 also regulates auxin homeostasis in control of shoot branching.

2010年10月1日 · R2R3-MYB transcription factors have a modular structure, with an N terminal DNA-binding domain (the MYB domain) and an activation or repression domain usually located at the C terminus.

We demonstrate that EXB1 controls AM initiation by positively regulating the transcription of RAX1, RAX2, and RAX3. Disruption of the RAX genes partially rescues the branching phenotype caused by EXB1 overexpression. We further show that EXB1 also regulates auxin homeostasis in control of shoot branching.

茎分枝分生组织的形成，是由几个关键转录因子调控的，包括regulator of axillary meristems1 (rax1)、rax2和rax3。 然而，茎分枝的调控网络在很大程度上仍然是未知的。

RAX3 (subgroup 14) are partially redundant regulators of axillary meristem formation. AtMYB37 acts early during the vegetative phase, whereas AtMYB38 affects accessory side shoot formation during inflorescence development, both having a greater impact than AtMYB84 [57,58]. AtMYB105/LOF2andAtMYB117/LOF1(subgroup21)con-

2022年12月7日 · Here we report that the type-B response regulator MpRRB upregulates the expression of the R2R3-MYB transcription factor GEMMA CUP-ASSOCIATED MYB1 (Mp GCAM1) in M. polymorpha.

已知“腋芽分生组织调控因子” (regulator of axillary meristems1，rax1)，rax2和rax3基因在调控腋芽分生组织形成过程中起到非常重要的作用，这些rax基因都编码myb类转录因子。

本研究通过在GenBank 中寻找拟南芥RAX基因相关序列,通过同源比对,采用RACE技术,克隆获得普通烟草中与RAX基因高度相似的基因,目的是为研究该基因的功能奠定基础,进而为通过分子手段解决烟草腋芽问题奠定基础。 供试烟草品种为K326。 2010年冬,在温室内播种,自然光照条件下生长至营养生长期。 1.2.1 总RNA的提取和检测取烟草K326幼嫩叶片为材料,Trizol 法提取幼嫩叶片的总RNA。 1×TBE缓冲液,1% 琼脂糖凝胶,电泳检测总RNA。 1.2.2 反转录获得cDNA 以总RNA为 …