Genome-wide identification, classification and expression analysis of NAC family of genes in sorghum [Sorghum bicolor (L.) Moench] View Full Text


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Article Info

DATE

2017-07-03

AUTHORS

Yibadaiti Kadier, Yi-yi Zu, Qing-min Dai, Ge Song, Shi-wen Lin, Qing-peng Sun, Jin-bao Pan, Min Lu

ABSTRACT

NAC transcription factors are involved in many biological processes via regulation of downstream target gene expression and play essential roles in regulation of plant growth and improving plant tolerance to abiotic stress. NAC transcription factors have been studied in various species, but little information is available regarding these factors in sorghum. Genome-wide investigation of potentially abiotic stress related sorghum NAC-type genes was performed. A total of 145 non-redundant NAC genes (SbNAC1 –SbNAC145) were identified in the sorghum genome. These genes were distributed unevenly across the 10 chromosomes, and were divided into 16 groups based on sequence similarity. Gene structure analysis indicated that most SbNAC genes contained three exons and two introns, and had ten putative conserved motifs. Phylogenetic analysis indicated that the SbNAC genes with similar motif distributions were clustered into the same branch. Seven SbNAC genes, which were grouped into the stress-related subgroup, were isolated and have been confirmed to have transcriptional activity in yeast. SbNAC genes showed differential expression patterns over time in response to dehydration, salinity, cold, and phytohormone abscisic acid stress treatments, thus suggesting essential roles in plant responses to abiotic stress. In the germination stage, SbNAC56 overexpression transgenic lines exhibited significantly enhanced hypersensitivities to ABA, NaCl and d-Mannitol. This may infer that SbNAC56 may play essential roles in plants response to abiotic stresses in ABA dependent signaling pathway. Here, we present a comprehensive overview of the SbNAC genes and provide a foundation for future functional research regarding their biological roles in sorghum stress tolerance, even in the regulation of plant growth. More... »

PAGES

301-312

References to SciGraph publications

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  • 2013-08-29. Expression of SbSNAC1, a NAC transcription factor from sorghum, confers drought tolerance to transgenic Arabidopsis in PLANT CELL, TISSUE AND ORGAN CULTURE (PCTOC)
  • 2001-08. Quantitative trait loci influencing drought tolerance in grain sorghum (Sorghum bicolor L. Moench) in THEORETICAL AND APPLIED GENETICS
  • 2015-09-21. A transposable element in a NAC gene is associated with drought tolerance in maize seedlings in NATURE COMMUNICATIONS
  • 2014-03-15. Genome-Wide Analysis and Expression Patterns of NAC Transcription Factor Family Under Different Developmental Stages and Abiotic Stresses in Chinese Cabbage in PLANT MOLECULAR BIOLOGY REPORTER
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    26 schema:description NAC transcription factors are involved in many biological processes via regulation of downstream target gene expression and play essential roles in regulation of plant growth and improving plant tolerance to abiotic stress. NAC transcription factors have been studied in various species, but little information is available regarding these factors in sorghum. Genome-wide investigation of potentially abiotic stress related sorghum NAC-type genes was performed. A total of 145 non-redundant NAC genes (SbNAC1 –SbNAC145) were identified in the sorghum genome. These genes were distributed unevenly across the 10 chromosomes, and were divided into 16 groups based on sequence similarity. Gene structure analysis indicated that most SbNAC genes contained three exons and two introns, and had ten putative conserved motifs. Phylogenetic analysis indicated that the SbNAC genes with similar motif distributions were clustered into the same branch. Seven SbNAC genes, which were grouped into the stress-related subgroup, were isolated and have been confirmed to have transcriptional activity in yeast. SbNAC genes showed differential expression patterns over time in response to dehydration, salinity, cold, and phytohormone abscisic acid stress treatments, thus suggesting essential roles in plant responses to abiotic stress. In the germination stage, SbNAC56 overexpression transgenic lines exhibited significantly enhanced hypersensitivities to ABA, NaCl and d-Mannitol. This may infer that SbNAC56 may play essential roles in plants response to abiotic stresses in ABA dependent signaling pathway. Here, we present a comprehensive overview of the SbNAC genes and provide a foundation for future functional research regarding their biological roles in sorghum stress tolerance, even in the regulation of plant growth.
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    33 schema:keywords ABA
    34 Gene structure analysis
    35 Genome-wide identification
    36 NAC family
    37 NAC genes
    38 NAC transcription factors
    39 NAC-type genes
    40 NaCl
    41 SbNAC genes
    42 SbNAC56
    43 SbNAC56 overexpression transgenic lines
    44 abiotic stresses
    45 abscisic acid stress treatments
    46 acid stress treatments
    47 activity
    48 analysis
    49 biological processes
    50 biological role
    51 branches
    52 chromosomes
    53 classification
    54 comprehensive overview
    55 dehydration
    56 differential expression patterns
    57 distribution
    58 downstream target gene expression
    59 essential role
    60 exons
    61 expression
    62 expression analysis
    63 expression patterns
    64 factors
    65 family
    66 foundation
    67 functional research
    68 future functional research
    69 gene expression
    70 genes
    71 genome
    72 genome-wide investigation
    73 germination stage
    74 group
    75 growth
    76 hypersensitivity
    77 identification
    78 information
    79 introns
    80 investigation
    81 lines
    82 little information
    83 mannitol
    84 most SbNAC genes
    85 motif
    86 motif distribution
    87 non-redundant NAC genes
    88 overexpression transgenic lines
    89 overview
    90 pathway
    91 patterns
    92 phylogenetic analysis
    93 phytohormone abscisic acid stress treatments
    94 plant growth
    95 plant responses
    96 plant tolerance
    97 process
    98 regulation
    99 research
    100 response
    101 role
    102 salinity
    103 same branch
    104 sequence similarity
    105 similar motif distributions
    106 similarity
    107 sorghum
    108 sorghum NAC-type genes
    109 sorghum genome
    110 sorghum stress tolerance
    111 species
    112 stage
    113 stress
    114 stress tolerance
    115 stress treatments
    116 stress-related subgroup
    117 structure analysis
    118 subgroups
    119 target gene expression
    120 time
    121 tolerance
    122 total
    123 transcription factors
    124 transcriptional activity
    125 transgenic lines
    126 treatment
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