The Plant Journal

Journal: The Plant Journal

Abbreviation

Plant j.

Publisher

Wiley-Blackwell

ISSN

0960-7412
1365-313X

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Publications 1 - 10 of 58

Recycling of pyridoxine (vitamin B6) by PUP1 in Arabidopsis
Szydlowski, Nicolas; Bürkle, Lukas; Pourcel, Lucille; et al. (2013)
The Plant Journal
Mutagenesis of cysteine 81 prevents dimerization of the APS1 subunit of ADP-glucose pyrophosphorylase and alters diurnal starch turnover in Arabidopsis thaliana leaves
Hadrich, Nadja; Hendriks, Janneke H.M.; Kötting, Oliver; et al. (2012)
The Plant Journal
Meiosis in allopolyploid Arabidopsis suecica
Nibau, Candida; Gonzalo, Adrián; Evans, Aled; et al. (2022)
The Plant Journal
Polyploidy is a major force shaping eukaryote evolution but poses challenges for meiotic chromosome segregation. As a result, first-generation polyploids often suffer from more meiotic errors and lower fertility than established wild polyploid populations. How established polyploids adapt their meiotic behaviour to ensure genome stability and accurate chromosome segregation remains an active research question. We present here a cytological description of meiosis in the model allopolyploid species Arabidopsis suecica (2n = 4x = 26). In large part meiosis in A. suecica is diploid-like, with normal synaptic progression and no evidence of synaptic partner exchanges. Some abnormalities were seen at low frequency, including univalents at metaphase I, anaphase bridges and aneuploidy at metaphase II; however, we saw no evidence of crossover formation occurring between non-homologous chromosomes. The crossover number in A. suecica is similar to the combined number reported from its diploid parents Arabidopsis thaliana (2n = 2x = 10) and Arabidopsis arenosa (2n = 2x = 16), with an average of approximately 1.75 crossovers per chromosome pair. This contrasts with naturally evolved autotetraploid A. arenosa, where accurate chromosome segregation is achieved by restricting crossovers to approximately 1 per chromosome pair. Although an autotetraploid donor is hypothesized to have contributed the A. arenosa subgenome to A. suecica, A. suecica harbours diploid A. arenosa variants of key meiotic genes. These multiple lines of evidence suggest that meiosis in the recently evolved allopolyploid A. suecica is essentially diploid like, with meiotic adaptation following a very different trajectory to that described for autotetraploid A. arenosa.
Genome-scale Arabidopsis promoter array identifies targets of the histone acetyltransferase GCN5
Benhamed, Moussa; Martin-Magniette, Marie-Laure; Taconnat, Ludivine; et al. (2008)
The Plant Journal
EVE (external variance estimation) increases statistical power for detecting differentially expressed genes
Wille, Anja; Gruissem, Wilhelm; Bühlmann, Peter; et al. (2007)
The Plant Journal
PDX1 is essential for vitamin B6 biosynthesis, development and stress tolerance in Arabidopsis
Titiz, Olca; Tambasco-Studart, Marina; Warzych, Ewelina; et al. (2006)
The Plant Journal
Concurrent activation of cell death-regulating signaling pathways by singlet oxygen in Arabidopsis thaliana
Danon, Antoine; Miersch, Otto; Felix, Georg; et al. (2005)
The Plant Journal
Alteration of cell wall xylan acetylation triggers defense responses that counterbalance the immune deficiencies of plants impaired in the β-subunit of the heterotrimeric G-protein
Escudero, Viviana; Jordá, Lucía; Sopeña-Torres, Sara; et al. (2017)
The Plant Journal
Arabidopsis heterotrimeric G-protein complex modulates pathogen-associated molecular pattern-triggered immunity (PTI) and disease resistance responses to different types of pathogens. It also plays a role in plant cell wall integrity as mutants impaired in the Gβ- (agb1-2) or Gγ-subunits have an altered wall composition compared with wild-type plants. Here we performed a mutant screen to identify suppressors of agb1-2 (sgb) that restore susceptibility to pathogens to wild-type levels. Out of the four sgb mutants (sgb10–sgb13) identified, sgb11 is a new mutant allele of ESKIMO1 (ESK1), which encodes a plant-specific polysaccharide O-acetyltransferase involved in xylan acetylation. Null alleles (sgb11/esk1-7) of ESK1 restore to wild-type levels the enhanced susceptibility of agb1-2 to the necrotrophic fungus Plectosphaerella cucumerina BMM (PcBMM), but not to the bacterium Pseudomonas syringae pv. tomato DC3000 or to the oomycete Hyaloperonospora arabidopsidis. The enhanced resistance to PcBMM of the agb1-2 esk1-7 double mutant was not the result of the re-activation of deficient PTI responses in agb1-2. Alteration of cell wall xylan acetylation caused by ESK1 impairment was accompanied by an enhanced accumulation of abscisic acid, the constitutive expression of genes encoding antibiotic peptides and enzymes involved in the biosynthesis of tryptophan-derived metabolites, and the accumulation of disease resistance-related secondary metabolites and different osmolites. These esk1-mediated responses counterbalance the defective PTI and PcBMM susceptibility of agb1-2 plants, and explain the enhanced drought resistance of esk1 plants. These results suggest that a deficient PTI-mediated resistance is partially compensated by the activation of specific cell-wall-triggered immune responses.
Anthranilate N-methyltransferase, a branch-point enzyme of acridone biosynthesis
Rohde, Britta; Hans, Joachim; Martens, Stefan; et al. (2008)
The Plant Journal
Tryptophan-derived secondary metabolites in Arabidopsis thaliana confer non-host resistance to necrotrophic Plectosphaerella cucumerina fungi
Sánchez-Vallet, Andrea; Ramos, Brisa; Bednarek, Pawel; et al. (2010)
The Plant Journal

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