Characterization and expression analysis under bending and other abiotic factors of PtaZFP2, a poplar gene encoding a Cys2/His2 zinc finger protein

Martin, Ludovic; Leblanc‐Fournier, Nathalie; Azri, Wassim; Lenne, Catherine; Henry, Clémence; Coutand, Catherine; Julien, Jean-Louis

doi:10.1093/treephys/tpn011

Cited by 32 publications

(51 citation statements)

References 80 publications

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“…The in situ molecular reaction to mechanical deformation takes minutes (Martin et al 2009), while basipetal hormonal transmission of wind stimulus requires a longer time. Considering wind conditions at the monthly scale, the closer correlations with the chronologies of compression wood (Fig.…”

Section: Relationship Between Compression Wood and Wind Regimementioning

confidence: 99%

Wind contribution to yearly silver fir (Abies alba Mill.) compression wood development in the Romanian Carpathians

Dinulică¹,

Marcu²,

Borz³

et al. 2016

iForest

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Since the 1950s, wind has represented one of the main disturbances to forest ecosystems in Europe, causing an increase in the frequency and amount of trees uprooted or broken by wind. Such phenomenon has also increased the incidence of compression wood in the xylem of remnant trees, thus leading to a general decrease in timber quality. In this study, we aimed to determine how wind regime affects the incidence of compression wood by reconstructing its chronology at both inter-and intra-annual scale using dendroclimatic methods. Six silver fir stands at different elevations were selected in central Romania, and compression wood time series were obtained from both increment cores from standing trees and radial discs from felled trees. Wood-structure variables were statistically analyzed as time series, while fluctuations of wind frequency and speed over the period 1921-present were reconstructed based on meteorological data. The structural response of sampled trees to wind was assessed based on the annual fluctuation in the frequency and intensity of compression wood. Results showed that the incidence of compression wood in the time series was synchronized with the intensity of the wind, rather than its duration. Wind regime in December of the preceding calendar year was significantly correlated with the frequency of compression wood, whereas its intensity was significantly correlated with wind load of previous September. The response of cambium to the wind stimulus increased with distance from the tree collar, peaking in the section at the base of the crown. At a decennial scale, only high-intensity wind stress triggered structural responses in the studied trees. Wind effects on xylogenesis in the analyzed stands increased over the last decades as a consequence of the local forest management. A better understanding of the structural response of forest trees to wind regime may explain how individual and groups of trees compete for stability and can help to improve forest management strategies in windy regions.

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Section: Relationship Between Compression Wood and Wind Regimementioning

confidence: 99%

Wind contribution to yearly silver fir (Abies alba Mill.) compression wood development in the Romanian Carpathians

Dinulică¹,

Marcu²,

Borz³

et al. 2016

iForest

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“…The homolog of this gene has also been found in poplar (Populus tremula 3 alba '717-1B4') and called PtaZFP2 (Martin et al, 2009). The deduced amino acid sequence of PtaZFP2 contains all typical conserved regions of Cys-2/His-2 transcription factors with two zinc fingers (Ciftci-Yilmaz and Mittler, 2008;Martin et al, 2009). In both walnut and poplar, transcript levels of ZFP2 are much higher after mechanical loading than after other abiotic factors such as saline and cold stresses (Leblanc-Fournier et al, 2008;Martin et al, 2009).…”

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confidence: 99%

“…In woody plants, a primary mechanosensitive gene called JrZFP2 has recently been found in walnut (Juglans regia; Leblanc-Fournier et al, 2008). The homolog of this gene has also been found in poplar (Populus tremula 3 alba '717-1B4') and called PtaZFP2 (Martin et al, 2009). The deduced amino acid sequence of PtaZFP2 contains all typical conserved regions of Cys-2/His-2 transcription factors with two zinc fingers (Ciftci-Yilmaz and Mittler, 2008;Martin et al, 2009).…”

mentioning

confidence: 99%

“…The deduced amino acid sequence of PtaZFP2 contains all typical conserved regions of Cys-2/His-2 transcription factors with two zinc fingers (Ciftci-Yilmaz and Mittler, 2008;Martin et al, 2009). In both walnut and poplar, transcript levels of ZFP2 are much higher after mechanical loading than after other abiotic factors such as saline and cold stresses (Leblanc-Fournier et al, 2008;Martin et al, 2009). Moreover, after stem bending, ZFP2 is only expressed in the mechanically strained tissues (Leblanc-Fournier et al, 2008;Martin et al, 2009).…”

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confidence: 99%

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Strain Mechanosensing Quantitatively Controls Diameter Growth and PtaZFP2 Gene Expression in Poplar

et al. 2009

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Mechanical signals are important factors that control plant growth and development. External mechanical loadings lead to a decrease in elongation and a stimulation of diameter growth, a syndrome known as thigmomorphogenesis. A previous study has demonstrated that plants perceive the strains they are subjected to and not forces or stresses. On this basis, an integrative biomechanical model of mechanosensing was established ("sum-of-strains model") and tested on tomato (Solanum lycopersicum) elongation but not for local responses such as diameter growth or gene expression. The first aim of this interdisciplinary work was to provide a quantitative study of the effect of a single transitory bending on poplar (Populus tremula 3 alba) diameter growth and on the expression level of a primary mechanosensitive transcription factor gene, PtaZFP2. The second aim of this work was to assess the sum-of-strains model of mechanosensing on these local responses. An original bending device was built to study stem responses according to a controlled range of strains. A single bending modified plant diameter growth and increased the relative abundance of PtaZFP2 transcripts. Integrals of longitudinal strains induced by bending on the responding tissues were highly correlated to local plant responses. The sum-of-strains model of mechanosensing established for stem elongation was thus applicable for local responses at two scales: diameter growth and gene expression.

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“…This TF belongs to the Cys-2/His-2-type zinc finger protein family that was previously reported to regulate defense responses against biotic and abiotic challenges (Ciftci-Yilmaz and Mittler, 2008). A Cys-2/ His-2-type zinc finger protein was previously identified in a poplar hybrid (Populus tremula 3 Populus alba; Martin et al, 2009). This gene, named PtaZFP2, was shown to be up-regulated in response to mechanical stress and wounding as well as cold and salt treatments .…”

Section: Discussionmentioning

confidence: 99%

Stress-Responsive Mitogen-Activated Protein Kinases Interact with the EAR Motif of a Poplar Zinc Finger Protein and Mediate Its Degradation through the 26S Proteasome

Hamel

Benchabane²,

Nicole³

et al. 2011

Plant Physiology

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Mitogen-activated protein kinases (MAPKs) contribute to the establishment of plant disease resistance by regulating downstream signaling components, including transcription factors. In this study, we identified MAPK-interacting proteins, and among the newly discovered candidates was a Cys-2/His-2-type zinc finger protein named PtiZFP1. This putative transcription factor belongs to a family of transcriptional repressors that rely on an ERF-associated amphiphilic repression (EAR) motif for their repression activity. Amino acids located within this repression motif were also found to be essential for MAPK binding. Close examination of the primary protein sequence revealed a functional bipartite MAPK docking site that partially overlaps with the EAR motif. Transient expression assays in Arabidopsis (Arabidopsis thaliana) protoplasts suggest that MAPKs promote PtiZFP1 degradation through the 26S proteasome. Since features of the MAPK docking site are conserved among other EAR repressors, our study suggests a novel mode of defense mechanism regulation involving stress-responsive MAPKs and EAR repressors.

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Characterization and expression analysis under bending and other abiotic factors of PtaZFP2, a poplar gene encoding a Cys2/His2 zinc finger protein

Cited by 32 publications

References 80 publications

Wind contribution to yearly silver fir (Abies alba Mill.) compression wood development in the Romanian Carpathians

Wind contribution to yearly silver fir (Abies alba Mill.) compression wood development in the Romanian Carpathians

Strain Mechanosensing Quantitatively Controls Diameter Growth and PtaZFP2 Gene Expression in Poplar

Stress-Responsive Mitogen-Activated Protein Kinases Interact with the EAR Motif of a Poplar Zinc Finger Protein and Mediate Its Degradation through the 26S Proteasome

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