%0 Journal Article
%A DING Yi-Wei
%A HE Li-Ming
%A ZHAN Ya-Guang
%A ZHANG Jia-Wei
%T Cloning and Expression Analysis of Two <i>PLT</i> Transcription Factors Genes in <i>Fraxinus mandshurica</i>
%D 2019
%R 10.7525/j.issn.1673-5102.2019.01.017
%J Bulletin of Botanical Research
%P 139-147
%V 39
%N 1
%X In order to investigate the function and mechanism of the PLT transcription factor in the root development of <i>Fraxinus mandshurica</i>, we cloned two <i>PLT</i> transcription factors from <i>F.mandshurica</i>, and named them <i>FmPLT</i>2 and <i>FmPLT</i>3 by homologous alignment, encoding 532 and 497 amino acid residues, respectively. By bioinformatics analysis, the relative molecular masses of <i>FmPLT</i>2 and FmPLT3 were 59 and 55 kDa, respectively, and the isoelectric points were 5.98 and 5.79, respectively. They were all hydrophilic unstable proteins, and both contained two AP2 conserved domains. By phylogenetic analysis, <i>FmPLT</i>2 and <i>FmPLT</i>3 had the highest homology with the <i>OePLT</i>2 and <i>OeOLT</i>3 genes of the Oleaceae, respectively. Subcellular localization predictions showed that both FmPLT2 and FmPLT3 proteins were mainly concentrated in the nucleus. The expression of <i>FmPLT</i>2 and <i>FmPLT</i>3 in different tissues and roots of different developmental stages was analyzed by qRT-PCR. The tissue-specific expression of <i>FmPLT</i>2 and <i>FmPLT</i>3 was similar and they all have the highest expression in roots and the lowest expression in leaves. The expression level of <i>FmPLT</i>2 in roots at different developmental stages is extremely significant. Especially, the expression level of <i>FmPLT</i>2 on the 21st day of root development is 32 times as high as that at the 0 day, but the expression of <i>FmPLT</i>3 was not significant, indicating that <i>FmPLT</i>2 not only plays an important role in root development, but also may participate in multiple developmental pathways such as cell proliferation and growth.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2019.01.017