An Arabidopsis gene regulatory network for secondary cell wall synthesis

Nature, Journal Year: 2014, Volume and Issue: 517(7536), P. 571 - 575

Published: Dec. 23, 2014

Language: Английский

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NAC-MYB-based transcriptional regulation of secondary cell wall biosynthesis in land plants

Frontiers in Plant Science, Journal Year: 2015, Volume and Issue: 6

Published: May 5, 2015

Plant cells biosynthesize primary cell walls in all and produce secondary (SCWs) specific types that conduct water and/or provide mechanical support, such as xylem vessels fibers. The characteristic stiffness, chemical recalcitrance, hydrophobic nature of SCWs result from the organization SCW-specific biopolymers, i.e., highly ordered cellulose, hemicellulose, lignin. Synthesis these biopolymers requires enzymes are regulated by transcription factors. In this review, we summarize our current knowledge transcriptional regulation SCW formation plant cells. Advances research on biosynthesis during past decade have expanded understanding formation, particularly functions NAC MYB Focusing NAC-MYB-based network, discuss regulatory systems evolved land plants to modify wall serve a key component structures support.

Language: Английский

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Secondary cell walls: biosynthesis and manipulation

Journal of Experimental Botany, Journal Year: 2015, Volume and Issue: 67(2), P. 515 - 531

Published: Dec. 9, 2015

Secondary cell walls (SCWs) are produced by specialized plant types, and particularly important in those cells providing mechanical support or involved water transport. As the main constituent of biomass, secondary central to attempts generate second-generation biofuels. Partly as a consequence this renewed economic importance, excellent progress has been made understanding how wall components synthesized. SCWs largely composed three polymers: cellulose, hemicellulose, lignin. In review, we will attempt highlight most recent biosynthetic pathways for components, these regulated, knowledge may be exploited improve properties that facilitate breakdown without compromising growth productivity. While individual pathway improved dramatically, they function together make final polymers incorporated into remain less well understood.

Language: Английский

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MdMYB46 could enhance salt and osmotic stress tolerance in apple by directly activating stress‐responsive signals

Plant Biotechnology Journal, Journal Year: 2019, Volume and Issue: 17(12), P. 2341 - 2355

Published: May 11, 2019

To expand the cultivation area of apple (Malus×domestica Borkh.) and select resistant varieties by genetic engineering, it is necessary to clarify mechanism salt osmotic stress tolerance in apple. The MdMYB46 transcription factor was identified, treatment test MdMYB46-overexpressing MdMYB46-RNAi lines indicated that could enhance In transgenic Arabidopsis apple, promoted biosynthesis secondary cell wall deposition lignin directly binding promoter biosynthesis-related genes. explore whether coordinate signal transduction pathways cooperate with formation walls plants, MdABRE1A, MdDREB2A dehydration-responsive genes MdRD22 MdRD29A were screened out for their positive correlation stress, transcriptional level MdMYB46. further verification demonstrated activate promoters these above results indicate not only activating pathways, but also stress-responsive signals.

Language: Английский

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NAC transcription factors in plant immunity

Phytopathology Research, Journal Year: 2019, Volume and Issue: 1(1)

Published: Jan. 16, 2019

The NAC (NAM, ATAF and CUC) family is one of the largest plant-specific transcription factor (TF) families. Members this are implicated in plant growth, development stress responses. Recent functional studies demonstrate that a number TFs function as positive or negative regulators immunity to biotrophic, hemibiotrophic necotrophic pathogens, modulators hypersensitive responses stomatal virulence targets pathogen effectors. They affect through their regulatory impact on signaling hormones, which turn key players immune This review summarizes current knowledge recent progress our understanding biological functions discusses perspectives directions for further study elucidate molecular mechanisms TF potential application improvement crop disease resistance.

Language: Английский

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The transcription factor PbrMYB24 regulates lignin and cellulose biosynthesis in stone cells of pear fruits

PLANT PHYSIOLOGY, Journal Year: 2023, Volume and Issue: 192(3), P. 1997 - 2014

Published: April 3, 2023

Abstract Lignified stone cell content is a key factor used to evaluate fruit quality, influencing the economic value of pear (Pyrus pyrifolia) fruits. However, our understanding regulatory networks formation limited due complex secondary metabolic pathway. In this study, we combination co-expression network analysis, gene expression profiles, and transcriptome analysis in different cultivars with varied identify hub MYB gene, PbrMYB24. The relative PbrMYB24 flesh was significantly correlated contents cells, lignin, cellulose. We then verified function regulating lignin cellulose via genetic transformation homologous heterologous systems. constructed high-efficiency verification system for biosynthesis genes callus. transcriptionally activated multiple target involved formation. On one hand, transcription by binding cis-elements [AC-I (ACCTACC) element, AC-II (ACCAACC) element MYB-binding sites (MBS)]. other bound directly promoters PbrMYB169 NAC STONE CELL PROMOTING FACTOR (PbrNSC), activating expression. Moreover, both PbrNSC promoter PbrMYB24, enhancing This study improves synthesis regulation fruits through identifying regulator establishing network. knowledge will be useful reducing pears molecular breeding.

Language: Английский

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The MYB46/MYB83-mediated transcriptional regulatory programme is a gatekeeper of secondary wall biosynthesis

Annals of Botany, Journal Year: 2014, Volume and Issue: 114(6), P. 1099 - 1107

Published: July 1, 2014

The secondary cell wall is a defining feature of xylem cells and allows them to resist both gravitational forces the tension associated with transpirational pull on their internal columns water. Secondary walls also constitute majority plant biomass. Formation requires co-ordinated transcriptional regulation genes involved in biosynthesis cellulose, hemicellulose lignin. This control appears involve multifaceted multilayered regulatory programme. Transcription factor MYB46 (At5g12870) has been shown function as master regulator formation Arabidopsis thaliana. Recent studies show that not only regulates transcription factors but for all three major components (i.e. lignin) walls. review considers our current understanding MYB46-mediated network, including upstream regulators, downstream targets negative regulators MYB46. unique it directly well pathway. As such, may offer useful means pathway-specific manipulation biosynthesis. However, realization this potential additional information 'MYB46-mediated programme', such direct targets, interacting partners

Language: Английский

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Xylem development – from the cradle to the grave

New Phytologist, Journal Year: 2015, Volume and Issue: 207(3), P. 519 - 535

Published: March 23, 2015

Summary The development and growth of plants, as well their successful adaptation to a variety environments, is highly dependent on the conduction water, nutrients other important molecules throughout plant body. Xylem specialized vascular tissue that serves conduit water minerals provides mechanical support for upright growth. Wood, also known secondary xylem, constitutes major part mature woody stems roots. In past two decades, number key factors including hormones, signal transducers (post)transcriptional regulators have been shown control xylem formation. We outline main mechanisms be essential in various species, with an emphasis Arabidopsis thaliana , several tree species where has long history investigation. summarize processes which instrumental during maturation. This includes cell wall formation death collectively complete fate. Contents 519 I. Introduction II. Anatomy types 520 III. birth protoxylem – molecular determining identity IV. maturation, 527 V. Conclusions 530 Acknowledgements References

Language: Английский

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The quest for transcriptional hubs of lignin biosynthesis: beyond the NAC-MYB-gene regulatory network model

Current Opinion in Biotechnology, Journal Year: 2018, Volume and Issue: 56, P. 82 - 87

Published: Oct. 26, 2018

Language: Английский

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A stress‐associated NAC transcription factor (SlNAC35) from tomato plays a positive role in biotic and abiotic stresses

Physiologia Plantarum, Journal Year: 2016, Volume and Issue: 158(1), P. 45 - 64

Published: March 19, 2016

The NAC transcription factor family participates in responses to various kinds of environmental stimuli plants. Responses genes abiotic stresses have been widely studied, but their functions response biotic stress are little reported plants, especially crops. In the present study, we examined a novel tomato ( Solanum lycopersicum ) protein SlNAC35 and resistance by using transgenic tobacco. Expression analysis found that expression was induced drought stress, salt bacterial pathogen, signaling molecules, suggesting its involvement plant stimuli. Moreover, lines exhibited greater number lateral roots longer root length compared with Vec (empty vector lines) after treatment. These results indicate overexpression promoted growth development under stresses. Higher expressions NtARF1 , NtARF2 NtARF8 were observed lines, possibly involving auxin regulating NtARF expression. addition, improved pathogen tobacco, reactive oxygen species may be upstream salicylic acid SA tobacco during defense response.

Language: Английский

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