Identification of TCP Transcription Factors in Artemisia annua and Analysis of Their Expression Patterns under MeJA Treatment
Based on the genome data of Artemisia annua,the TCP gene family members were identified,and their protein physicochemical properties,evolutionary relationships,and cis-acting elements were analyzed.Transcriptome data were used to analyze the expression pattern of TCP transcription factors in Artemisia annua under different light treatments,and qRT-PCR was used to detect their expression under methyl jasmonate(MeJA)treatment.The results showed that a total of 29 TCP genes(AaTCPs)were identified.AaTCPs differed greatly in protein physicochemical properties,in which the number of amino acids and protein molecular mass ranged from 132 to 443 and 14.60 to 47.86 ku,respectively,and the isoelectric points,instability indices,and fat coefficients were in the ranges of 5.67 to 9.99,33.28 to 69.77,and 51.70 to 77.40,respectively,and all of them were nuclear proteins.Phylogenetic relationships showed that AaTCPs could be classified into class Ⅰ(11)and class Ⅱ(18),unevenly distributed on eight chromosomes.The Motif number of AaTCPs ranged from 1 to 7,all of them contained one conserved TCP2 structural domain,and a large number of light-,hormone-,and stress-responsive elements were present in their promoters.Protein interaction predictions revealed tight interactions among the protein members of AaTCPs except for AaTCP12 and AaTCP8.Transcriptome data showed that the expression levels of AaTCPs varied under different light treatments,and the expression of most genes was induced by light.qRT-PCR analysis revealed that the expression of AaTCPs all increased to different degrees under MeJA treatment,showing dynamic changes with the extension of treatment time.In summary,the AaTCP gene family plays a significant role in light regulation and hormone response processes.
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