A NAC Transcription Factor Represses Putrescine Biosynthesis and Affects Drought Tolerance

Wu, Hao; Fu, Bing; Sun, Peilong; Xiao, Chang; Liu, Jihong

doi:10.1104/pp.16.01096

Cited by 108 publications

(87 citation statements)

References 84 publications

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“…PtrNAC72 from Poncirus trifoliate was reported to regulate putrescine biosynthesis by controlling the gene expression of arginine decarboxylase (ADC), subsequently mediating ROS homeostasis [106]. The transgenic Arabidopsis plants with PtrNAC72 overexpression accumulated relatively low putrescine through downregulating ADC gene expression, while higher putrescine accumulation was detected in T-DNA inserted mutant nac72, resulting in decreased and increased drought resistance, respectively [106]. In addition, glutathione is a prototypic anti-oxidative metabolite that functionally eliminates the harmful effects of drought produced ROS [127].…”

Section: Nac Tfsmentioning

confidence: 99%

Transcriptional Factors Regulate Plant Stress Responses Through Mediating Secondary Metabolism

Meraj

Raza

et al. 2020

Genes

167

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Plants are adapted to sense numerous stress stimuli and mount efficient defense responses by directing intricate signaling pathways. They respond to undesirable circumstances to produce stress-inducible phytochemicals that play indispensable roles in plant immunity. Extensive studies have been made to elucidate the underpinnings of defensive molecular mechanisms in various plant species. Transcriptional factors (TFs) are involved in plant defense regulations through acting as mediators by perceiving stress signals and directing downstream defense gene expression. The cross interactions of TFs and stress signaling crosstalk are decisive in determining accumulation of defense metabolites. Here, we collected the major TFs that are efficient in stress responses through regulating secondary metabolism for the direct cessation of stress factors. We focused on six major TF families including AP2/ERF, WRKY, bHLH, bZIP, MYB, and NAC. This review is the compilation of studies where researches were conducted to explore the roles of TFs in stress responses and the contribution of secondary metabolites in combating stress influences. Modulation of these TFs at transcriptional and post-transcriptional levels can facilitate molecular breeding and genetic improvement of crop plants regarding stress sensitivity and response through production of defensive compounds.

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Section: Nac Tfsmentioning

confidence: 99%

Transcriptional Factors Regulate Plant Stress Responses Through Mediating Secondary Metabolism

Meraj

Raza

et al. 2020

Genes

167

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“…Tomato JUN-GBRUNNEN1 directly binds to the promoters of SlDREB1, SlDREB2, and SlDELLA, increasing the drought tolerance of tomato [38]. PtrNAC72 is a repressor of putrescine biosynthesis in Poncirus trifoliata and may negatively regulate drought stress responses by regulating putrescine-related reactive oxygen homeostasis [39]. Since the NAC gene family plays a crucial role in many developmental processes and responses to abiotic stresses, it is of great significance to study the NAC gene family in Theobroma cacao.…”

mentioning

confidence: 99%

Genome-Wide Analysis of the NAC Domain Transcription Factor Gene Family in Theobroma cacao

Shen

Zhang

Shi

et al. 2019

Genes

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As a plant-specific transcription factor, the NAC (NAM, ATAF1/2 and CUC2) domain protein plays an important role in plant growth and development, as well as stress resistance. Based on the genomic data of the cacao tree, this study identified 102 cacao NAC genes and named them according to their location within the genome. The phylogeny of the protein sequence of the cacao tree NAC family was analyzed using various bioinformatic methods, and then divided into 12 subfamilies. Then, the amino-acid composition, physicochemical properties, genomic location, gene structure, conserved domains, and promoter cis-acting elements were analyzed. This study provides information on the evolution of the TcNAC gene and its possible functions, laying the foundation for further research on the NAC family. Genes 2020, 11, 35 2 of 11 hormone signaling [23,24]. In total, 166 species with NAC genes were identified. For example, there are 105 in Arabidopsis [25], 151 in Oryza sativa [26], 142 in Vitis vinifera [27], 163 in Populus trichocarpa [28], 113 in Prunus mume [29], 63 in Coffea canephora [30], and 152 in the soybean genome [31]. However, NAC genes were not studied in Theobroma cacao.Theobroma cacao, also known as the cacao tree, belongs to the Malvaceae family and is one of the world s three major beverage crops. Cocoa beans are the seeds of cacao trees and are the main raw material for chocolate. Globally, 3.7 million tons of cocoa beans are produced per year; however, diseases and pests cause harvest losses of about 30%. Determining the genes associated with cacao tree resistance is a key issue in its genetic breeding. Cacao trees also have high economic value because the cacao flavanols provide health benefits, which can be used in nutritional products [32][33][34], and cocoa polyphenols such as catechin and epicatechin have significant antioxidant properties and free radical-scavenging ability. To date, most studies of cacao trees focused on their active components; there were few studies at the genome level. The genome of the cacao tree was completed and published in 2011 [35], providing a powerful tool for studying the cacao tree at the gene level.Many studies showed that, after plant stress, the NAC transcription factor family is involved in the regulation of responses to environmental stress [36]. Overexpression of TsNAC1 in Thellungiella salsuginea can increase abiotic stress resistance [37], especially salt stress resistance. Tomato JUN-GBRUNNEN1 directly binds to the promoters of SlDREB1, SlDREB2, and SlDELLA, increasing the drought tolerance of tomato [38]. PtrNAC72 is a repressor of putrescine biosynthesis in Poncirus trifoliata and may negatively regulate drought stress responses by regulating putrescine-related reactive oxygen homeostasis [39]. Since the NAC gene family plays a crucial role in many developmental processes and responses to abiotic stresses, it is of great significance to study the NAC gene family in Theobroma cacao. In this study, we analyze the genetic structure, conserved motifs, chromosome loc...

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“…OsNAC2 (Oryza sativa) Full length and C-terminal Nucleus Negatively regulates plant height and flowering time by controlling GA pathway genes; also promotes shoot branching [144,145] 48 OsNAC5 (Oryza sativa) C-terminal Nucleus Regulates stress tolerance [146] 49 PtrNAC72 (Poncirus trifoliate) Full length and C-terminal Nucleus Represses putrescine biosynthesis and negatively regulates drought stress response [12] 50 RD26/RESPONSIVE TO DESICCATION 26/ANAC72 (Arabidopsis thaliana)…”

Section: Mlnac5 (Miscanthus Lutarioriparius)mentioning

confidence: 99%

“…[4,5] NAC proteins evolved long before the emergence of land plants. [9][10][11][12][13][14][15][16] NAC TFs are greatly amplified in the plant lineage, constituting 151 protein encoding genes in rice, 117 in Arabidopsis, 152 in maize, and similar numbers in other species. [6][7][8] Members of this family play important roles in plant life, from embryogenesis till senescence.…”

Section: Introductionmentioning

confidence: 99%

May the Fittest Protein Evolve: Favoring the Plant‐Specific Origin and Expansion of NAC Transcription Factors

Mathew

Agarwal

2018

BioEssays

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Plant-specific NAC transcription factors (TFs) evolve during the transition from aquatic to terrestrial plant life and are amplified to become one of the biggest TF families. This is because they regulate genes involved in water conductance and cell support. They also control flower and fruit formation. The review presented here focuses on various properties, regulatory intricacies, and developmental roles of NAC family members. Processes controlled by NACs depend majorly on their transcriptional properties. NACs can function as both activators and/or repressors. Additionally, their homo/hetero dimerization abilities can also affect DNA binding and activation properties. The active protein levels are dependent on the regulatory cascades. Because NACs regulate both development and stress responses in plants, in-depth knowledge about them has the potential to help guide future crop improvement studies.

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A NAC Transcription Factor Represses Putrescine Biosynthesis and Affects Drought Tolerance

Cited by 108 publications

References 84 publications

Transcriptional Factors Regulate Plant Stress Responses Through Mediating Secondary Metabolism

Transcriptional Factors Regulate Plant Stress Responses Through Mediating Secondary Metabolism

Genome-Wide Analysis of the NAC Domain Transcription Factor Gene Family in Theobroma cacao

May the Fittest Protein Evolve: Favoring the Plant‐Specific Origin and Expansion of NAC Transcription Factors

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