Expansion and Functional Diversification of TFIIB-Like Factors in Plants

He, Ning; Yang, Su; Fan, Baofang; C, Zhu; Chen, Zhixiang

doi:10.3390/ijms22031078

Cited by 7 publications

(9 citation statements)

References 38 publications

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“…The other hub transcripts in the EQ, such as TFIIIB and PNC1, are linked to transcriptional regulation and the loading of ATP molecules. TFIIB is commonly associated with stimulating the development of reproductive structures (Ning et al 2021), an event in which biological processes are enriched during all experimental time points in this group (see Growth and development). Finally, PNC1 helps modulate energy levels by balancing intracellular ADT/ATP levels, and its action has been reported in plants under numerous stresses, complicating its precise interpretation (Fonseca-Pereira et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Molecular attributes of the tropical treeAvicennia schauerianainvolved in the response and tolerance to low temperatures

de Moura,

Aono,

Cruz

et al. 2024

Preprint

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Mangroves are coastal ecosystems of great socioenvironmental importance that are highly threatened by human activities. Mangrove trees live under harsh environmental conditions, which makes them sensitive to extreme weather events, particularly freezing events. Such events are unpredictable and have catastrophic consequences for mangrove trees; therefore, understanding and anticipating the impacts of such events are essential for directing future mitigation measures. Freezing cold currently limits the distribution of mangroves to tropical and subtropical latitudes worldwide. Mangrove trees are seriously affected by freezing conditions and suffer severe metabolic fluctuations due to photosystem and cellular structure damage. However, land plants more broadly have developed sophisticated mechanisms of resistance to freezing during their evolution, and the central molecular mechanisms involved in this process are consistent. However, the known information is restricted to models of herbaceous plants, such as Arabidopsis thaliana, that are native to temperate habitats, and there is a research gap regarding tropical trees such as mangroves. This work aimed to improve the understanding of the molecular aspects of the response and tolerance to freezing in mangrove trees using Avicennia schaueriana as a model. This species occurs within the colder range limits of South American mangroves and shows evidence of the existence of two functional groups that are locally adapted to the equatorial (EQ) and subtropical (ST) portions of the Brazilian coast. We investigated the transcriptional profiles of seedlings from both functional groups under freezing shock (-4C) in a time series. We analyzed transcriptomic data by combining differential expression, coexpression network and protein interaction data. Our results allowed us to describe the profile of the molecular response of A. schaueriana to freezing and the divergence in the behavior of the EQ and ST functional groups. In EQ plants, the response strongly depended on the action of abscisic acid (ABA) and stress signals throughout the experiment. Notably, ABA negatively affects plant growth and promotes the accumulation of carotenoids, anthocyanins and lipids through chlorophyll degradation. On the other hand, in the ST, there were fewer hormones active in the process of primary growth maintenance and metabolic normalization. The accumulation of substances is mainly based on sucrose, anthocyanin and lipid levels, and lipid synthesis is not dependent on chlorophyll degradation. Based on these results, we hypothesize that susceptibility to freezing damage is greater in EQ mangroves than in ST mangroves. Therefore, we recommend that this fact be considered when managing this species, especially at higher latitudes, which are more prone to lower temperatures and extreme freezing events.

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Section: Discussionmentioning

confidence: 99%

Molecular attributes of the tropical treeAvicennia schauerianainvolved in the response and tolerance to low temperatures

de Moura,

Aono,

Cruz

et al. 2024

Preprint

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show abstract

“…A case study was conducted on special transcription control in plants in the presence of two non-redundant plant-specific RNA polymerases, Pol IV and Pol V, which produce non-coding RNAs required for transcriptional gene silencing through the RNA-directed DNA methylation (RdDM) pathway [ 18 ]. In addition, expansion of general transcription factors has been observed, particularly the TFIIB-like factors, with at least 14 members in Arabidopsis [ 19 , 20 ]. In contrast, TFIIB often has only two homologs, Rrn7 and Brf1, in other eukaryotes as general transcription factors for Pol I and Pol III, respectively [ 19 ].…”

Section: Conserved and Unique Features Of Transcription And Mediator ...mentioning

confidence: 99%

“…In contrast, TFIIB often has only two homologs, Rrn7 and Brf1, in other eukaryotes as general transcription factors for Pol I and Pol III, respectively [ 19 ]. Molecular and genetic analysis has revealed important functions of these TFIIB-like factors in many plant-specific biological processes, including gametogenesis, pollen tube growth guidance, endosperm development and plant–microbe interactions [ 20 ]. There is a functional interplay between Mediator and TFIIB in PIC assembly, which is closely related to the promoter architecture through specific protein–protein interactions [ 21 ].…”

Section: Conserved and Unique Features Of Transcription And Mediator ...mentioning

confidence: 99%

The Mediator Complex: A Central Coordinator of Plant Adaptive Responses to Environmental Stresses

Chen

Yang

Fan

et al. 2022

IJMS

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As sessile organisms, plants are constantly exposed to a variety of environmental stresses and have evolved adaptive mechanisms, including transcriptional reprogramming, in order to survive or acclimate under adverse conditions. Over the past several decades, a large number of gene-specific transcription factors have been identified in the transcriptional regulation of plant adaptive responses. The Mediator complex plays a key role in transducing signals from gene-specific transcription factors to the transcription machinery to activate or repress target gene expression. Since its first purification about 15 years ago, plant Mediator complex has been extensively analyzed for its composition and biological functions. Mutants of many plant Mediator subunits are not lethal but are compromised in growth, development and response to biotic and abiotic stress, underscoring a particularly important role in plant adaptive responses. Plant Mediator subunits also interact with partners other than transcription factors and components of the transcription machinery, indicating the complexity of the regulation of gene expression by plant Mediator complex. Here, we present a comprehensive discussion of recent analyses of the structure and function of plant Mediator complex, with a particular focus on its roles in plant adaptive responses to a wide spectrum of environmental stresses and associated biological processes.

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“…The KEGG term of these DEGs was associated with the metabolism of primary and secondary, energy metabolism, and genetic information processing (Figure S2a). For instance, transcription factor IIE (TFIIE) factors and LRR receptor-like serine/threonine protein kinase (LRR), known for functions in plant-microbe interactions, were upregulated in the Tv group (Figure 3b) [47,48]. The expression pattern of other receptor-like kinases, like proline-rich receptor-like protein kinase (PERK2, 8), appears to be as diverse as its function.…”

Section: Transcriptional Expression Analysis Of As Leaves' Response T...mentioning

confidence: 99%

“…Thirdly, the global transcriptional changes of As genes encoding receptor kinases (i.e., LRR, PERKs) and cell wall biogenesis (i.e., GP1 and 6-FEH) are upregulated in As leaves precontact with T. virens, which are all well known to be the environmental stimulus [47,48,52] Additionally, via untargeted metabolome analysis, several interesting substrates were obtained from the Tv-treated As leaves, including bilirubin, epinephrine, and isosteviol (Figure 4a). Bilirubin is involved in the biosynthesis of various plant secondary metabolites, and foliar spraying positively affects maize growth and yield [73].…”

Section: Effect Of T Virens On As Plant Growth Regulationmentioning

confidence: 99%

New Insights into the Mechanism of Trichoderma virens-Induced Developmental Effects on Agrostis stolonifera Disease Resistance against Dollar Spot Infection

Gan

Yin

Niu

et al. 2022

JoF

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Trichoderma is internationally recognized as a biocontrol fungus for its broad-spectrum antimicrobial activity. Intriguingly, the crosstalk mechanism between the plant and Trichoderma is dynamic, depending on the Trichoderma strains and the plant species. In our previous study, the Trichoderma virens 192-45 strain showed better pathogen inhibition through the secretive non-volatile and volatile substrates. Therefore, we studied transcriptional and metabolic responses altered in creeping bentgrass (Agrostis stolonifera L.) with T. virens colonization prior to a challenge with Clarireedia homoeocarpa. This fungal pathogen causes dollar spot on various turfgrasses. When the pathogen is deficient, the importance of T. virens to the enhancement of plant growth can be seen in hormonal production and microbe signaling, such as indole-3-acrylic acid. Therefore, these substrates secreted by T. virens and induced genes related to plant growth can be the ‘pre-defense’ for ensuing pathogen attacks. During C. homoeocarpa infection, the Trichoderma–plant interaction activates defense responses through the SA- and/or JA-dependent pathway, induced by T. virens and its respective exudates, such as oleic, citric, and stearic acid. Thus, we will anticipate a combination of genetic engineering and exogenous application targeting these genes and metabolites, which could make creeping bentgrass more resistant to dollar spot and other pathogens.

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Expansion and Functional Diversification of TFIIB-Like Factors in Plants

Cited by 7 publications

References 38 publications

Molecular attributes of the tropical treeAvicennia schauerianainvolved in the response and tolerance to low temperatures

Molecular attributes of the tropical treeAvicennia schauerianainvolved in the response and tolerance to low temperatures

The Mediator Complex: A Central Coordinator of Plant Adaptive Responses to Environmental Stresses

New Insights into the Mechanism of Trichoderma virens-Induced Developmental Effects on Agrostis stolonifera Disease Resistance against Dollar Spot Infection

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