Abscisic acid regulates secondary cell-wall formation and lignin deposition in
            <i>Arabidopsis thaliana</i>
            through phosphorylation of NST1

Liu, Chang; Yu, Hasi; Rao, Xiaolan; Li, Laigeng; Dixon, Richard A.

doi:10.1073/pnas.2010911118

Cited by 104 publications

(81 citation statements)

References 68 publications

(82 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SnRK2 kinases, namely, SnRK2.2, 2.3, and 2.6, regulate secondary wall biosynthesis by physically interacting with a NAC family transcription factor, namely NAC secondary wall thickening promoting factor 1 (NST1). SnRK2 phosphorylates NST1 at Ser316, which is a site that is required for the transcriptional activation of downstream secondary wall biosynthesis genes [ 112 ].…”

Section: Regulation Of Plant Response To Salt Stressmentioning

confidence: 99%

Regulation of Plant Responses to Salt Stress

Zhao

Zhang

Liu

et al. 2021

IJMS

551

290

View full text Add to dashboard Cite

Salt stress is a major environmental stress that affects plant growth and development. Plants are sessile and thus have to develop suitable mechanisms to adapt to high-salt environments. Salt stress increases the intracellular osmotic pressure and can cause the accumulation of sodium to toxic levels. Thus, in response to salt stress signals, plants adapt via various mechanisms, including regulating ion homeostasis, activating the osmotic stress pathway, mediating plant hormone signaling, and regulating cytoskeleton dynamics and the cell wall composition. Unraveling the mechanisms underlying these physiological and biochemical responses to salt stress could provide valuable strategies to improve agricultural crop yields. In this review, we summarize recent developments in our understanding of the regulation of plant salt stress.

show abstract

Section: Regulation Of Plant Response To Salt Stressmentioning

confidence: 99%

Regulation of Plant Responses to Salt Stress

Zhao

Zhang

Liu

et al. 2021

IJMS

551

290

View full text Add to dashboard Cite

show abstract

“…To date, most of our understanding of the function of the R2R3 MYB genes in plants is derived from the analysis of the model plant A. thaliana . In the poplar and willow, only a few R2R3 MYB genes have been cloned and functionally verified ( Fang et al, 2020 ; Tang et al, 2020 ; Wang et al, 2020 ; Liu C. et al, 2021 ). As these genes play important roles in multiple growth and developmental pathways, it is urgent to characterize their roles in the Salicaceae, to identify and classify the genes, and thus to provide a reference for subsequent functional verification of the R2R3 MYB gene family.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Comparative Analysis of R2R3 MYB Gene Family in Populus and Salix and Identification of Male Flower Bud Development-Related Genes

Zhou

Chen

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

The MYB transcription factor (TF) family is one of the largest plant transcription factor gene family playing vital roles in plant growth and development, including defense, cell differentiation, secondary metabolism, and responses to biotic and abiotic stresses. As a model tree species of woody plants, in recent years, the identification and functional prediction of certain MYB family members in the poplar genome have been reported. However, to date, the characterization of the gene family in the genome of the poplar’s sister species willow has not been done, nor are the differences and similarities between the poplar and willow genomes understood. In this study, we conducted the first genome-wide investigation of the R2R3 MYB subfamily in the willow, identifying 216 R2R3 MYB gene members, and combined with the poplar R2R3 MYB genes, performed the first comparative analysis of R2R3 MYB genes between the poplar and willow. We identified 81 and 86 pairs of R2R3 MYB paralogs in the poplar and willow, respectively. There were 17 pairs of tandem repeat genes in the willow, indicating active duplication of willow R2R3 MYB genes. A further 166 pairs of poplar and willow orthologs were identified by collinear and synonymous analysis. The findings support the duplication of R2R3 MYB genes in the ancestral species, with most of the R2R3 MYB genes being retained during the evolutionary process. The phylogenetic trees of the R2R3 MYB genes of 10 different species were drawn. The functions of the poplar and willow R2R3 MYB genes were predicted using reported functional groupings and clustering by OrthoFinder. Identified 5 subgroups in general expanded in woody species, three subgroups were predicted to be related to lignin synthesis, and we further speculate that the other two subgroups also play a role in wood formation. We analyzed the expression patterns of the GAMYB gene of subgroup 18 (S18) related to pollen development in the male flower buds of poplar and willow at different developmental stages by qRT-PCR. The results showed that the GAMYB gene was specifically expressed in the male flower bud from pollen formation to maturity, and that the expression first increased and then decreased. Both the specificity of tissue expression specificity and conservation indicated that GAMYB played an important role in pollen development in both poplar and willow and was an ideal candidate gene for the analysis of male flower development-related functions of the two species.

show abstract

“…Recent studies with Arabidopsis aba 2 mutants deficient ABA biosynthesis showed delayed fiber production and decreased transcript levels for fiber marker genes ( NST1 , SND1 , SND2 , IRX3 ) [ 49 ]. Activated SnRK2 in the ABA core signaling pathway can phosphorylate NST1, while suppression of NST1 and SND2, which are responsible for initiation of fiber cell wall thickening [ 23 , 24 , 25 ], results in very thin xylary cell walls in Arabidopsis nst1/snd1 double mutants [ 50 ]. Since SnRK2 can directly activate NST1 by phosphorylation and snrk2 as well as aba2 mutants have thinner fiber cell walls and contain less cellulose and lignin than the wildtype Liu et al [ 50 ] proposed that ABA regulates secondary cell wall production via the ABA core signaling pathway.…”

Section: Discussionmentioning

confidence: 99%

Wood Formation under Severe Drought Invokes Adjustment of the Hormonal and Transcriptional Landscape in Poplar

Janz

Zienkiewicz

et al. 2021

IJMS

View full text Add to dashboard Cite

Drought is a severe environmental stress that exerts negative effects on plant growth. In trees, drought leads to reduced secondary growth and altered wood anatomy. The mechanisms underlying wood stress adaptation are not well understood. Here, we investigated the physiological, anatomical, hormonal, and transcriptional responses of poplar to strong drought. Drought-stressed xylem was characterized by higher vessel frequencies, smaller vessel lumina, and thicker secondary fiber cell walls. These changes were accompanied by strong increases in abscisic acid (ABA) and antagonistic changes in salicylic acid in wood. Transcriptional evidence supported ABA biosynthesis and signaling in wood. Since ABA signaling activates the fiber-thickening factor NST1, we expected upregulation of the secondary cell wall (SCW) cascade under stress. By contrast, transcription factors and biosynthesis genes for SCW formation were down-regulated, whereas a small set of cellulose synthase-like genes and a huge array of genes involved in cell wall modification were up-regulated in drought-stressed wood. Therefore, we suggest that ABA signaling monitors normal SCW biosynthesis and that drought causes a switch from normal to “stress wood” formation recruiting a dedicated set of genes for cell wall biosynthesis and remodeling. This proposition implies that drought-induced changes in cell wall properties underlie regulatory mechanisms distinct from those of normal wood.

show abstract

Abscisic acid regulates secondary cell-wall formation and lignin deposition in Arabidopsis thaliana through phosphorylation of NST1

Cited by 104 publications

References 68 publications

Regulation of Plant Responses to Salt Stress

Regulation of Plant Responses to Salt Stress

Genome-Wide Comparative Analysis of R2R3 MYB Gene Family in Populus and Salix and Identification of Male Flower Bud Development-Related Genes

Wood Formation under Severe Drought Invokes Adjustment of the Hormonal and Transcriptional Landscape in Poplar

Contact Info

Product

Resources

About