18 results on '"Habricot Y"'
Search Results
2. Ultracytochemical localization and characterization of membrane-bound ATPases in lateral buds from intact and decapitated plants of an aquatic fern,Marsilea drummondii A. Br.
- Author
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Sossountzov, L. and Habricot, Y.
- Published
- 1985
- Full Text
- View/download PDF
3. Early effects of decapitation on the Mg2+-K+ ATPase and cation contents in lateral buds of the aquatic fern,Marsilea drummondii A. Br.
- Author
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Sossountzov, L., Habricot, Y., Garrec, J. P., and Lamant, A.
- Published
- 1985
- Full Text
- View/download PDF
4. Changes in the lanthanum distribution following decapitation of the sporophytes of an aquatic fern,Marsilea drummondii A. Br.
- Author
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Habricot, Y. and Sossountzov, L.
- Published
- 1984
- Full Text
- View/download PDF
5. Dynamics of symbiotic establishment between an IAA-overproducing mutant of the ectomycorrhizal fungus Hebeloma cylindrosporum and Pinus pinaster
- Author
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Tranvan, H., primary, Habricot, Y., additional, Jeannette, E., additional, Gay, G., additional, and Sotta, B., additional
- Published
- 2000
- Full Text
- View/download PDF
6. Ultracytochemical localization and characterization of membrane-bound ATPases in lateral buds from intact and decapitated plants of an aquatic fern, Marsilea drummondii A. Br.
- Author
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Sossountzov, L. and Habricot, Y.
- Abstract
The electron-microscopic localization of ATPase activity was studied in the median lateral bud-bearing nodes in intact and decapitated sporophytes of Marsilea drummondii. ATPase activity was confined to the plasma membrane of xylem transfer cells, phloem parenchyma cells and sieve tubes belonging to the stele of the main axis. No activity was found in the bud branch. One of the membrane-bound ATPase components is a Mg ATPase, which is stimulated by K and functions optimally at pH 6.5 with ATP as substrate. Numerous inhibitors were tested which restricted or completely inhibited ATPase sites in transfer cells and sieve tubes. The use of CCCP, DCCD, DES, NEM or PCMBS allowed a distinction to be made between these conducting elements which are differentially affected by the inhibitors. The structurally polarized transfer cells remain functional on the side abutting the xylem tracheids but are inoperative on the opposite side, i.e., in phloem loading. The Mg-K ATPase in the bud trace was rapidly stimulated (in one hour) after decapitation. These results are consistent with a transport role for this ATPase, and support the view that its stimulation is a prerequisite for the resumption of bud activity. [ABSTRACT FROM AUTHOR]
- Published
- 1985
- Full Text
- View/download PDF
7. Early effects of decapitation on the Mg-K ATPase and cation contents in lateral buds of the aquatic fern, Marsilea drummondii A. Br.
- Author
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Sossountzov, L., Habricot, Y., Garrec, J., and Lamant, A.
- Abstract
A detailed comparison of Mg-K ATPase activity and cation fluxes in terminal buds, inhibited buds or buds released from apical dominance was carried out. Light microscope observations indicate intense reaction at the plasmalemma of stelar cells, pericyclic, phloem and xylem transfer cells at nodes along the main rhizome. In intact plants, with the exception of pericyclic cells, bud branches show no ATPase activity. Excision of the terminal bud results in rapid (within 5-15 minutes) stimulation of ATPase activity at nodes and all bud axes. As the subapical bud gains precedence, ATPase stimulation ceases and returns to its initial level in the older median and basal buds. Enzyme activation is kinetically correlated with K flux. X-ray microanalysis confirms that K accumulates in the stele at the node and the bud branch with the same lag period. This data increases the evidence for close association between ATP ( Sossountzov et al. 1982), ATPase activity and K flux. The kinetics strengthen the impression that these factors may be involved very early in bud outgrowth regulation. [ABSTRACT FROM AUTHOR]
- Published
- 1985
- Full Text
- View/download PDF
8. Changes in the lanthanum distribution following decapitation of the sporophytes of an aquatic fern, Marsilea drummondii A. Br.
- Author
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Habricot, Y. and Sossountzov, L.
- Abstract
The active terminal bud and the quiescent lateral buds and corresponding nodes inserted at different levels on the main rhizome of Marsilea drummondii were examined with the EM after in vivo feeding with lanthanum nitrate. These tracer experiments demonstrate that all the buds are fed by their phloem cells. In the lateral bud axis the labelling of the sieve elements apoplast indicates that a solute transfer took place in the node between xylem and phloem via xylem transfer cells. La deposits are completely absent from the apical dome of inhibited buds indicating that the walls of the quiescent meristematic cells are not permeated by the tracer. The removal of the terminal bud has two effects. It rapidly (in 2 hours) allows the lanthanum to penetrate the lateral bud tip walls at a stage when no fine structural changes are discernable and to bind to the outer surface of the plasmalemma as it does in the active terminal bud. This study including inhibited buds and buds released from apical dominance support the view that changes in the state of the cell surface (cell wall and plasma membrane) may be a prerequisite for the resumption growth activity. [ABSTRACT FROM AUTHOR]
- Published
- 1984
- Full Text
- View/download PDF
9. Early effects of decapitation on the Mg2+-K+ ATPase and cation contents in lateral buds of the aquatic fern,Marsilea drummondii A. Br.
- Author
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Sossountzov, L., Habricot, Y., Garrec, J. P., and Lamant, A.
- Abstract
Summary A detailed comparison of Mg
2+ -K+ ATPase activity and cation fluxes in terminal buds, inhibited buds or buds released from apical dominance was carried out. Light microscope observations indicate intense reaction at the plasmalemma of stelar cells, pericyclic, phloem and xylem transfer cells at nodes along the main rhizome. In intact plants, with the exception of pericyclic cells, bud branches show no ATPase activity. Excision of the terminal bud results in rapid (within 5–15 minutes) stimulation of ATPase activity at nodes and all bud axes. As the subapical bud gains precedence, ATPase stimulation ceases and returns to its initial level in the older median and basal buds. Enzyme activation is kinetically correlated with K+ flux. X-ray microanalysis confirms that K+ accumulates in the stele at the node and the bud branch with the same lag period. This data increases the evidence for close association between ATP (Sossountzovet al. 1982), ATPase activity and K+ flux. The kinetics strengthen the impression that these factors may be involved very early in bud outgrowth regulation.- Published
- 1985
- Full Text
- View/download PDF
10. Cauliflower mosaic virus-induced viroplasms support viral DNA synthesis in a cell-free system
- Author
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Modjtahedi, N., primary, Volovitch, M., additional, Sossountzov, L., additional, Habricot, Y., additional, Bonneville, J.M., additional, and Yot, P., additional
- Published
- 1984
- Full Text
- View/download PDF
11. The mitogen-activated protein kinase phosphatase PHS1 regulates flowering in Arabidopsis thaliana.
- Author
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Tang Q, Guittard-Crilat E, Maldiney R, Habricot Y, Miginiac E, Bouly JP, and Lebreton S
- Subjects
- Arabidopsis growth & development, Arabidopsis Proteins genetics, DNA-Binding Proteins genetics, DNA-Binding Proteins metabolism, Gene Expression Regulation, Plant, MADS Domain Proteins genetics, MADS Domain Proteins metabolism, Mutation, Photoperiod, Plants, Genetically Modified, Protein Tyrosine Phosphatases genetics, RNA Processing, Post-Transcriptional, Transcription Factors genetics, Transcription Factors metabolism, Arabidopsis physiology, Arabidopsis Proteins metabolism, Flowers physiology, Protein Tyrosine Phosphatases metabolism
- Abstract
Main Conclusion: Arabidopsis PHS1, initially known as an actor of cytoskeleton organization, is a positive regulator of flowering in the photoperiodic and autonomous pathways by modulating both CO and FLC mRNA levels. Protein phosphorylation and dephosphorylation is a major type of post-translational modification, controlling many biological processes. In Arabidopsis thaliana, five genes encoding MAPK phosphatases (MKP)-like proteins have been identified. Among them, PROPYZAMIDE HYPERSENSITIVE 1 (PHS1) encoding a dual-specificity protein tyrosine phosphatase (DsPTP) has been shown to be involved in microtubule organization, germination and ABA-regulated stomatal opening. Here, we demonstrate that PHS1 also regulates flowering under long-day and short-day conditions. Using physiological, genetic and molecular approaches, we have shown that the late flowering phenotype of the knock-out phs1-5 mutant is linked to a higher expression of FLOWERING LOCUS C (FLC). In contrast, a decline of both CONSTANS (CO) and FLOWERING LOCUS T (FT) expression is observed in the knock-out phs1-5 mutant, especially at the end of the light period under long-day conditions when the induction of flowering occurs. We show that this partial loss of sensitivity to photoperiodic induction is independent of FLC. Our results thus indicate that PHS1 plays a dual role in flowering, in the photoperiodic and autonomous pathways, by modulating both CO and FLC mRNA levels. Our work reveals a novel actor in the complex network of the flowering regulation.
- Published
- 2016
- Full Text
- View/download PDF
12. The intrinsically disordered C-terminal region of Arabidopsis thaliana TCP8 transcription factor acts both as a transactivation and self-assembly domain.
- Author
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Valsecchi I, Guittard-Crilat E, Maldiney R, Habricot Y, Lignon S, Lebrun R, Miginiac E, Ruelland E, Jeannette E, and Lebreton S
- Subjects
- Amino Acid Sequence, Amino Acids chemistry, Arabidopsis, Arabidopsis Proteins metabolism, Intrinsically Disordered Proteins metabolism, Molecular Sequence Data, Molecular Weight, Phosphorylation, Protein Binding, Protein Multimerization, Transcription Factors metabolism, Arabidopsis Proteins chemistry, Intrinsically Disordered Proteins chemistry, Protein Interaction Domains and Motifs, Transcription Factors chemistry
- Abstract
TCPs are plant specific transcription factors with non-canonical basic helix-loop-helix domains. While Arabidopsis thaliana has 24 TCPs involved in cell proliferation and differentiation, their mode of action has not been fully elucidated. Using bioinformatic tools, we demonstrate that TCP transcription factors belong to the intrinsically disordered proteins (IDP) family and that disorder is higher in class I TCPs than in class II TCPs. In particular, using bioinformatic and biochemical approaches, we have characterized TCP8, a class I TCP. TCP8 exhibits three intrinsically disordered regions (IDR) made of more than 50 consecutive residues, in which phosphorylable Ser residues are mainly clustered. Phosphorylation of Ser-211 that belongs to the central IDR was confirmed by mass spectrometry. Yeast two-hybrid assays also showed that the C-terminal IDR corresponds to a transactivation domain. Moreover, biochemical experiments demonstrated that TCP8 tends to oligomerize in dimers, trimers and higher-order multimers. Bimolecular fluorescence complementation (BiFC) experiments carried out on a truncated form of TCP8 lacking the C-terminal IDR indicated that it is effectively required for the pronounced self-assembly of TCP8. These data were reinforced by the prediction of a coiled coil domain in this IDR. The C-terminal IDR acts thus as an oligomerization domain and also a transactivation domain. Moreover, many Molecular Recognition Features (MoRFs) were predicted, indicating that TCP8 could interact with several partners to fulfill a fine regulation of transcription in response to various stimuli.
- Published
- 2013
- Full Text
- View/download PDF
13. Arabidopsis thaliana lipid phosphate phosphatase 2 is involved in abscisic acid signalling in leaves.
- Author
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Paradis S, Villasuso AL, Aguayo SS, Maldiney R, Habricot Y, Zalejski C, Machado E, Sotta B, Miginiac E, and Jeannette E
- Subjects
- Abscisic Acid pharmacology, Adaptation, Physiological genetics, Arabidopsis genetics, Arabidopsis Proteins genetics, Diacylglycerol Kinase metabolism, Down-Regulation, Droughts, Gene Expression drug effects, Genotype, Mutation, Phosphatidate Phosphatase genetics, Phosphatidic Acids metabolism, Phosphotransferases (Phosphate Group Acceptor) metabolism, Signal Transduction genetics, Stress, Physiological genetics, Water physiology, Abscisic Acid metabolism, Arabidopsis metabolism, Arabidopsis Proteins metabolism, Gene Expression Regulation, Plant drug effects, Genes, Plant, Phosphatidate Phosphatase metabolism, Plant Stomata physiology
- Abstract
Lipid phosphate phosphatases (LPPs, E.C. 3.1.3.4) catalyse the dephosphorylation of diacylglycerol pyrophosphate (DGPP) and phosphatidic acid (PA), which are secondary messengers in abscisic acid (ABA) signalling. In this study, we investigated the effect of ABA on the expression of AtLPP genes as they encode putative ABA-signalling partners. We observed that AtLPP2 expression was down-regulated by ABA and we performed experiments on Atlpp2-2, an AtLPP2 knockout mutant, to determine whether AtLPP2 was involved in ABA signalling. We observed that Atlpp2-2 plantlets contained about twice as much PA as the wild-type Col-0 and exhibited higher PA kinase (PAK) activity than Col-0 plants. In addition, we showed that ABA stimulated diacylglycerol kinase (DGK) activity independently of AtLPP2 activity but that the ABA-stimulation of PAK activity recorded in Col-0 was dependent on AtLPP2. In order to evaluate the involvement of AtLPP2 activity in guard cell function, we measured the ABA sensitivity of Atlpp2-2 stomata. The inhibition of stomatal opening was less sensitive to ABA in Atlpp2-2 than in Col-0. Watered and water-stressed plants of the two genotypes accumulated ABA to the same extent, thus leading us to consider Atlpp2-2 an ABA-signalling mutant. Taken together our observations show that AtLPP2 is a part of ABA signalling and participate to the regulation of stomatal movements., (Copyright © 2011 Elsevier Masson SAS. All rights reserved.)
- Published
- 2011
- Full Text
- View/download PDF
14. Protein tyrosine kinases and protein tyrosine phosphatases are involved in abscisic acid-dependent processes in Arabidopsis seeds and suspension cells.
- Author
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Ghelis T, Bolbach G, Clodic G, Habricot Y, Miginiac E, Sotta B, and Jeannette E
- Subjects
- Arabidopsis cytology, Arabidopsis embryology, Arabidopsis enzymology, Electrophoresis, Gel, Two-Dimensional, Enzyme Inhibitors pharmacology, Genistein pharmacology, Hydroquinones pharmacology, Phosphorylation, Protein Tyrosine Phosphatases antagonists & inhibitors, Protein Tyrosine Phosphatases chemistry, Protein-Tyrosine Kinases antagonists & inhibitors, Protein-Tyrosine Kinases chemistry, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Tyrphostins pharmacology, Abscisic Acid metabolism, Arabidopsis metabolism, Protein Tyrosine Phosphatases metabolism, Protein-Tyrosine Kinases metabolism
- Abstract
Protein tyrosine (Tyr) phosphorylation plays a central role in many signaling pathways leading to cell growth and differentiation in animals. Tyr phosphorylated proteins have been detected in higher plants, and the roles of protein Tyr phosphatases and protein Tyr kinases in some physiological responses have been shown. We investigated the involvement of Tyr phosphorylation events in abscisic acid (ABA) signaling using a pharmacological approach. Phenylarsine oxide, a specific inhibitor of protein Tyr phosphatase activity, abolished the ABA-dependent accumulation of RAB18 (responsive to ABA 18) transcripts. Protein Tyr kinase inhibitors like genistein, tyrphostin A23, and erbstatin blocked the RAB18 expression induced by ABA in Arabidopsis (Arabidopsis thaliana). Stomatal closure induced by ABA was also inhibited by phenylarsine oxide and genistein. We studied the changes in the Tyr phosphorylation levels of proteins in Arabidopsis seeds after ABA treatment. Proteins were separated by two-dimensional gel electrophoresis, and those phosphorylated on Tyr residues were detected using an anti-phosphotyrosine antibody by western blot. Changes were detected in the Tyr phosphorylation levels of 19 proteins after ABA treatment. Genistein inhibited the ABA-dependent Tyr phosphorylation of proteins. The 19 proteins were analyzed by matrix-assisted laser-desorption ionization time-of-flight/time-of-flight mass spectrometry. Among the proteins identified were storage proteins like cruciferins, enzymes involved in the mobilization of lipid reserves like aconitase, enolase, aldolase, and a lipoprotein, and enzymes necessary for seedling development like the large subunit of Rubisco. Additionally, the identification of three putative signaling proteins, a peptidyl-prolyl isomerase, an RNA-binding protein, and a small ubiquitin-like modifier-conjugating enzyme, enlightens how Tyr phosphorylation might regulate ABA transduction pathways in plants.
- Published
- 2008
- Full Text
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15. HY5 is a point of convergence between cryptochrome and cytokinin signalling pathways in Arabidopsis thaliana.
- Author
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Vandenbussche F, Habricot Y, Condiff AS, Maldiney R, Van der Straeten D, and Ahmad M
- Subjects
- Anthocyanins biosynthesis, Anthocyanins metabolism, Arabidopsis enzymology, Arabidopsis genetics, Arabidopsis Proteins metabolism, Basic-Leucine Zipper Transcription Factors metabolism, Cryptochromes, Gene Expression Regulation, Plant, Genes, Plant, Hypocotyl growth & development, Light, Mutation, Nuclear Proteins metabolism, Transcription Factors physiology, Ubiquitin-Protein Ligases, Arabidopsis physiology, Arabidopsis Proteins physiology, Basic-Leucine Zipper Transcription Factors physiology, Cytokinins physiology, Flavoproteins physiology, Nuclear Proteins physiology, Signal Transduction physiology
- Abstract
Blue-light-dependent photomorphogenesis in Arabidopsis is regulated principally by the cryptochrome flavin-type photoreceptors, which control hypocotyl growth inhibition, cotyledon and leaf expansion, and the expression of light-regulated genes. Interestingly the plant hormone cytokinin induces similar responses when added exogenously to germinating seedlings, suggesting a link between cryptochrome and cytokinin signalling pathways. In this work we explore the relationship between cryptochrome and cytokinin signalling pathways in the promotion of photomorphogenesis. The effect of exogenously added cytokinins on hypocotyl growth inhibition occurs in the dark, and is largely independent and additive to that of cryptochromes in blue light, via distinct signalling pathways. By contrast, cytokinin-dependent stimulation of anthocyanin accumulation occurs only in light, and interacts with the signalling pathway downstream of cryptochrome 1 (CRY1) at the level of transcript accumulation of anthocyanin biosynthetic genes. Mutants in elongated hypocotyl 5 (hy5), a downstream intermediate in the CRY1 signalling pathway, show a reduced induction of anthocyanin accumulation in blue light by cytokinins, similar to that observed for cryptochrome (cry1) mutants. Furthermore cytokinins are shown to increase levels of HY5 protein accumulation, suggesting that cytokinins may function by reducing HY5 degradation by COP1 (constitutively photomorphogenic 1). As both cryptochrome and cytokinin signalling pathways increase HY5 protein levels, and as HY5 binds to the promoters of anthocyanin biosynthetic enzymes to stimulate gene expression, it is concluded that the regulation of HY5 protein stability represents a point of convergence between cryptochrome and cytokinin signalling pathways.
- Published
- 2007
- Full Text
- View/download PDF
16. Cryptochrome photoreceptors cry1 and cry2 antagonistically regulate primary root elongation in Arabidopsis thaliana.
- Author
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Canamero RC, Bakrim N, Bouly JP, Garay A, Dudkin EE, Habricot Y, and Ahmad M
- Subjects
- Arabidopsis genetics, Arabidopsis Proteins, Cryptochromes, Culture Techniques, Flavoproteins antagonists & inhibitors, Flavoproteins genetics, Gene Expression, Indoleacetic Acids metabolism, Mutation, Arabidopsis growth & development, Flavoproteins physiology, Light, Plant Roots growth & development, Seedlings growth & development
- Abstract
Cryptochromes are blue-light receptors controlling multiple aspects of plant growth and development. They are flavoproteins with significant homology to photolyases, but instead of repairing DNA they function by transducing blue light energy into a signal that can be recognized by the cellular signaling machinery. Here we report the effect of cry1 and cry2 blue light receptors on primary root growth in Arabidopsis thaliana seedlings, through analysis of both cryptochrome-mutant and cryptochrome-overexpressing lines. Cry1 mutant seedlings show reduced root elongation in blue light while overexpressing seedlings show significantly increased elongation as compared to wild type controls. By contrast, the cry2 mutation has the opposite effect on root elongation growth as does cry1, demonstrating that cry1 and cry2 act antagonistically in this response pathway. The site of cryptochrome signal perception is within the shoot, and the inhibitor of auxin transport, 1-N-naphthylphthalamic acid, abolishes the differential effect of cryptochromes on root growth, suggesting the blue-light signal is transmitted from the shoot to the root by a mechanism that involves auxin. Primary root elongation in blue light may thereby involve interaction between cryptochrome and auxin signaling pathways.
- Published
- 2006
- Full Text
- View/download PDF
17. The phs1-3 mutation in a putative dual-specificity protein tyrosine phosphatase gene provokes hypersensitive responses to abscisic acid in Arabidopsis thaliana.
- Author
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Quettier AL, Bertrand C, Habricot Y, Miginiac E, Agnes C, Jeannette E, and Maldiney R
- Subjects
- Arabidopsis drug effects, Arabidopsis genetics, Arabidopsis Proteins genetics, Arabidopsis Proteins metabolism, Gene Expression Regulation, Plant drug effects, Germination drug effects, Light, Mutation, Protein Tyrosine Phosphatases genetics, Protein Tyrosine Phosphatases metabolism, Signal Transduction, Abscisic Acid pharmacology, Arabidopsis enzymology, Arabidopsis Proteins physiology, Plant Growth Regulators pharmacology, Protein Tyrosine Phosphatases physiology
- Abstract
The plant hormone abscisic acid (ABA) controls numerous physiological traits: dormancy and germination of seeds, senescence and resistance to abiotic stresses. In order to get more insight into the role of protein tyrosine phosphatase (PTP) in ABA signalling, we obtained eight homozygous T-DNA insertion lines in Arabidopsis thaliana PTP genes. One mutant, named phs1-3, exhibited a strong ABA-induced inhibition of germination as only 26% of its seeds germinated after 3 days instead of 92% for the Columbia (Col-0) line. Genetic and molecular analyses of phs1-3 showed that it bears a unique T-DNA insertion in the promoter of the gene and that the mutation is recessive. PHS1 expression in the mutant is about half that of the Col-0 line. The upregulation of two ABA-induced genes (At5g06760, RAB18) and the downregulation of two ABA-repressed genes (AtCLC-A, ACL) are enhanced in the phs1-3 mutant compared with the wild-type. The 'in planta' aperture of phs1-3 stomata is reduced and the inhibition of the light-induced opening of stomata by ABA is stronger in phs1-3 leaves than in Col-0 leaves. Finally, PHS1 expression is upregulated in the presence of ABA in both phs1-3 and Col-0 but more intensively in the mutant. Thus, phs1-3 is hypersensitive to ABA. Taken together, these results show that PHS1, which encodes a dual-specificity PTP, is a negative regulator of ABA signalling.
- Published
- 2006
- Full Text
- View/download PDF
18. Induction of abscisic acid-regulated gene expression by diacylglycerol pyrophosphate involves Ca2+ and anion currents in Arabidopsis suspension cells.
- Author
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Zalejski C, Paradis S, Maldiney R, Habricot Y, Miginiac E, Rona JP, and Jeannette E
- Subjects
- Anions metabolism, Arabidopsis cytology, Arabidopsis physiology, Arabidopsis Proteins metabolism, Calcium metabolism, Calcium Channel Blockers pharmacology, Cell Culture Techniques, Cells, Cultured, Chelating Agents pharmacology, Egtazic Acid pharmacology, Fluspirilene pharmacology, Glycerol metabolism, Membrane Potentials, Pimozide pharmacology, Signal Transduction, Abscisic Acid metabolism, Arabidopsis genetics, Arabidopsis Proteins genetics, Calcium physiology, Diphosphates metabolism, Gene Expression Regulation, Plant drug effects, Glycerol analogs & derivatives
- Abstract
Diacylglycerol pyrophosphate (DGPP) was recently shown to be a possible intermediate in abscisic acid (ABA) signaling. In this study, reverse transcription-PCR of ABA up-regulated genes was used to evaluate the ability of DGPP to trigger gene expression in Arabidopsis (Arabidopsis thaliana) suspension cells. At5g06760, LTI30, RD29A, and RAB18 were stimulated by ABA and also specifically expressed in DGPP-treated cells. Use of the Ca2+ channel blockers fluspirilene and pimozide and the Ca2+ chelator EGTA showed that Ca2+ was required for ABA induction of DGPP formation. In addition, Ca2+ participated in DGPP induction of gene expression via stimulation of anion currents. Hence, a sequence of Ca2+, DGPP, and anion currents, constituting a core of early ABA-signaling events necessary for gene expression, is proposed.
- Published
- 2006
- Full Text
- View/download PDF
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