Journal
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
Volume 57, Issue 8, Pages 673-687Publisher
WILEY
DOI: 10.1111/jipb.12344
Keywords
Molecular evolution; NAP subfamily; plant kingdom; species-specific expansion
Categories
Funding
- Ministry of Agriculture [2009ZX08009-061B]
- National Natural Science Foundation of China [31171616]
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The NAP (NAC-Like, Activated by AP(3)/PI) subfamily is one of the important plant-specific transcription factors, and controls many vital biological processes in plants. In the current study, 197 NAP proteins were identified from 31 vascular plants, but no NAP members were found in eight non-vascular plants. All NAP proteins were phylogenetically classified into two groups (NAP I and NAP II), and the origin time of the NAP I group might be relatively later than that of the NAP II group. Furthermore, species-specific gene duplications, caused by segmental duplication events, resulted in the expansion of the NAP subfamily after species-divergence. Different groups have different expansion rates, and the NAP group preference was found during the expansion in plants. Moreover, the expansion of NAP proteins may be related to the gain and loss of introns. Besides, functional divergence was limited after the gene duplication. Abscisic acid (ABA) might play an important role in leaf senescence, which is regulated by NAP subfamily. These results could lay an important foundation for expansion and evolutionary analysis of NAP subfamily in plants.
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