AUTHOR=Yang Qingqing , Yuan Cunquan , Cong Tianci , Wang Jia , Zhang Qixiang 

TITLE=Genome-wide identification of three-amino-acid-loop-extension gene family and their expression profile under hormone and abiotic stress treatments during stem development of Prunus mume

JOURNAL=Frontiers in Plant Science

VOLUME=13

YEAR=2022

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1006360

DOI=10.3389/fpls.2022.1006360

ISSN=1664-462X

ABSTRACT=<p>Transcription factors encoded by the three-amino-acid-loop-extension (TALE) gene family play a key role in regulating plant growth and development, and are involved in plant hormone regulatory pathways and responses to various environmental stresses. Researchers are currently studying <italic>TALE</italic> genes in different species, but <italic>Prunus mume</italic><italic>TALE</italic> genes have not yet been studied. Therefore, based on the <italic>P. mume</italic> genome, we found a total of 23 <italic>TALE</italic> gene family members, which were distributed on eight chromosomes. <italic>TALE</italic> genes contained the characteristic domains of this family, and could be divided into KNOTTED-like homeobox (KNOX) subfamily and BEL1-like homeobox (BELL) subfamily. They can form heterodimers with each other. Fragment duplication and tandem duplication events were the main reasons for the expansion of <italic>P. mume</italic><italic>TALE</italic> gene family members and the <italic>TALE</italic> genes were selected by different degrees of purification. The inter-species collinearity analysis showed that the relationship between <italic>P. mume</italic> and other four <italic>Prunus</italic> species was consistent with the distance of origin. Eleven members of <italic>P. mume</italic><italic>TALE</italic> genes were specifically highly expressed in stem, mainly at the early stage of stem development. The cis-element analysis showed that the promoter of <italic>P. mume</italic><italic>TALE</italic> genes contained a variety of hormone and abiotic stress response elements, and four <italic>TALE</italic> genes responded to two kinds of abiotic stresses and four kinds of hormones at the early stage of stem development. In conclusion, this study lays a foundation to explore the role of <italic>TALE</italic> gene family in <italic>P. mume</italic> growth and development.</p>