Myeloblastosis (MYB) proteins constitute one of the largest transcription factor (TF) families in plants and play crucial roles in regulating plant physiological and biochemical processes, including adaptation to diverse abiotic stresses. These TF families contain highly conserved MYB repeats (1R, R2R3, 3R and 4R) at the N-terminus. Roles for MYB TFs have been reported in response to such stresses as dehydration, salt, cold, and drought. The characterization of Masson pine (Pinus massoniana) MYB TFs are reported, including the analysis of MYB TFs expression in seedlings under controlled conditions and two different phosphate (Pi) deficient treatments. By searching for conserved MYB motifs in full transcriptomic RNA sequencing data for P. massoniana, 59 sequences were identified as MYB TFs. Conserved domain structures and comparative functional and phylogenetic relationships of these MYB TFs with those in Arabidopsis were assessed using various bioinformatics tools. Based on microarray analysis, P. massoniana MYB genes exhibited different expression patterns under the two Pi deficiency conditions. Genes encoding MYB TFs that showed increased expression under critical Pi deficiency were identified, and some MYBs were differentially expressed only under conditions of severe Pi starvation. These results are useful for the functional characterization of MYB TFs that may be involved in the response to Pi deficiency and play divergent roles in plants.

骨髓成纤维细胞病（MYB）蛋白质构成植物中最大的转录因子（TF）家族之一，在调节植物生理和生化过程（包括适应各种非生物胁迫）中起关键作用。这些TF家族在N端含有高度保守的MYB重复序列（1R，R2R3、3R和4R）。据报道，MYB TF的作用是应对诸如干旱，盐分，寒冷和干旱等压力。报道了马尾松（马尾松）MYB TFs的表征，包括在受控条件下和两种不同的磷酸盐（Pi）缺乏处理条件下对幼苗中MYB TFs表达的分析。通过搜索马尾假单胞菌的完整转录组RNA测序数据中保守的MYB基序，鉴定出59个序列为MYB TF。使用各种生物信息学工具评估了这些MYB TF与拟南芥中的保守结构域结构以及比较的功能和系统发育关系。基于微阵列分析，马尾松MYB基因在两种Pi缺乏条件下表现出不同的表达模式。鉴定了在关键的Pi缺乏下表达增加的表达的编码MYB TF的基因，并且某些MYB仅在严重的Pi饥饿的条件下差异表达。这些结果对于MYB TF的功能表征很有用，这些MYB TF可能参与对Pi缺乏的反应并在植物中发挥不同的作用。