Evaluation of the diversity and phylogenetic implications of NAC transcription factor members of four reference species from the different embryophytic plant groups
NAC transcription factors (TFs) are one of the largest and important TF family that are involved in the regulation of plant growth and development. They are characterized by a highly conserved N-terminal domain and a variable C-terminal domain. In the present study, the amino acid sequences of NAC T...
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Published in | Physiology and molecular biology of plants Vol. 25; no. 2; pp. 347 - 359 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
New Delhi
Springer India
01.03.2019
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | NAC transcription factors (TFs) are one of the largest and important TF family that are involved in the regulation of plant growth and development. They are characterized by a highly conserved N-terminal domain and a variable C-terminal domain. In the present study, the amino acid sequences of NAC TFs from four embryophytic plant species viz.
Arabidopsis thaliana
(Angiosperm),
Picea abies
(Gymnosperm),
Selaginella moellendorffii
(Pteridophyte) and
Physcomitrella patens
(Bryophyte) as reference of the different plant groups were collected from the Plant Transcription Factor Database (PTFD) and the phylogenetic relationships were evaluated. The phylogenetic tree revealed that the majority of the NAC members were interspersed in the major subgroups that indicated the expansion of the NAC members predates the speciation events. Thirty one (31), five (05), one (1) and ten (10) paralog pairs were determined respectively for
Arabidopsis
,
Picea
,
Selaginella
and
Physcomitrella
. The structure–function relationship of paralog pairs were inferred from the phylogenetic tree of combined set of paralogous gene pairs by studying the prevalence of flanking regions and motif analysis of the NAC proteins. The motif analysis revealed the presence of an N-terminal conserved domain, a characteristic of the majority of NAC family proteins. Conserved motifs in the C-terminal region were absent in the majority of the protein sequences except few members in
Arabidopsis
and
Physcomitrella
. Also the time of gene duplication of the paralog pairs were calculated that revealed the duplication events occurred between 4.48 and 45.94 MYA
Arabidopsis
, 167.57–532.86 MYA in
Picea
, and 29.12–53.53 MYA in
Physcomitrella
. |
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ISSN: | 0971-5894 0974-0430 |
DOI: | 10.1007/s12298-018-0581-9 |