Transcriptional Control of Seed Life: New Insights into the Role of the NAC Family

被引:3
|
作者
Fuertes-Aguilar, Javier [1 ]
Matilla, Angel J. [2 ]
机构
[1] Real Jardin Bot CSIC, Plaza Murillo 2, Madrid 28014, Spain
[2] Univ Santiago Compostela, Dept Biol Func, Santiago De Compostela 14971, Spain
关键词
TF binding sites; WRKY and NAC families; endoplasmic reticulum; endosperm; phytohormones; seed dormancy and germination; GENOME-WIDE IDENTIFICATION; INDUCED LEAF SENESCENCE; NO-APICAL-MERISTEM; FACTOR GENE FAMILY; ABSCISIC-ACID; ARABIDOPSIS-THALIANA; EXPRESSION ANALYSIS; REGULATORY NETWORK; STRESS-RESPONSE; DROUGHT RESISTANCE;
D O I
10.3390/ijms25105369
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Transcription factors (TFs) regulate gene expression by binding to specific sequences on DNA through their DNA-binding domain (DBD), a universal process. This update conveys information about the diverse roles of TFs, focusing on the NACs (NAM-ATAF-CUC), in regulating target-gene expression and influencing various aspects of plant biology. NAC TFs appeared before the emergence of land plants. The NAC family constitutes a diverse group of plant-specific TFs found in mosses, conifers, monocots, and eudicots. This update discusses the evolutionary origins of plant NAC genes/proteins from green algae to their crucial roles in plant development and stress response across various plant species. From mosses and lycophytes to various angiosperms, the number of NAC proteins increases significantly, suggesting a gradual evolution from basal streptophytic green algae. NAC TFs play a critical role in enhancing abiotic stress tolerance, with their function conserved in angiosperms. Furthermore, the modular organization of NACs, their dimeric function, and their localization within cellular compartments contribute to their functional versatility and complexity. While most NAC TFs are nuclear-localized and active, a subset is found in other cellular compartments, indicating inactive forms until specific cues trigger their translocation to the nucleus. Additionally, it highlights their involvement in endoplasmic reticulum (ER) stress-induced programmed cell death (PCD) by activating the vacuolar processing enzyme (VPE) gene. Moreover, this update provides a comprehensive overview of the diverse roles of NAC TFs in plants, including their participation in ER stress responses, leaf senescence (LS), and growth and development. Notably, NACs exhibit correlations with various phytohormones (i.e., ABA, GAs, CK, IAA, JA, and SA), and several NAC genes are inducible by them, influencing a broad spectrum of biological processes. The study of the spatiotemporal expression patterns provides insights into when and where specific NAC genes are active, shedding light on their metabolic contributions. Likewise, this review emphasizes the significance of NAC TFs in transcriptional modules, seed reserve accumulation, and regulation of seed dormancy and germination. Overall, it effectively communicates the intricate and essential functions of NAC TFs in plant biology. Finally, from an evolutionary standpoint, a phylogenetic analysis suggests that it is highly probable that the WRKY family is evolutionarily older than the NAC family.
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页数:41
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