A5033117752- Plant Molecular Biology Research
- Plant Reproductive Biology
- Plant Stress Responses and Tolerance
- Polysaccharides and Plant Cell Walls
- Plant nutrient uptake and metabolism
- Light effects on plants
- Plant Taxonomy and Phylogenetics
- Plant Gene Expression Analysis
- Plant Disease Resistance and Genetics
- Plant-Microbe Interactions and Immunity
- Plant Genetic and Mutation Studies
- Photosynthetic Processes and Mechanisms
- Plant Virus Research Studies
- Plant tissue culture and regeneration
- Seedling growth and survival studies
- Chromosomal and Genetic Variations
- Biomedical Ethics and Regulation
- Plant and fungal interactions
- Plant Pathogenic Bacteria Studies
University of Zurich
2017-2024
Center for Research in Agricultural Genomics
2021-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2012-2021
Fundación Instituto Leloir
2017-2021
Experimental Medicine and Biology Institute
2015-2017
Instituto de Biología Molecular y Celular de Rosario
2009-2015
National University of Rosario
2006-2015
Fundación Ciencias Exactas y Naturales
2014
University of Buenos Aires
2014
Institute of Astronomy and Space Physics
2014
Cell proliferation is an important determinant of plant form, but little known about how developmental programs control cell division. Here, we describe the role microRNA miR396 in coordination Arabidopsis leaves. In leaf primordia, expressed at low levels that steadily increase during organ development. We found antagonizes expression pattern its targets, GROWTH-REGULATING FACTOR (GRF) transcription factors. accumulates preferentially distal part young developing leaves, restricting GRF2 to...
Summary The growth‐regulating factors ( GRF s) are plant‐specific transcription factors. They form complexes with ‐interacting GIF s), a small family of transcriptional co‐activators. In Arabidopsis thaliana, seven out the nine s controlled by micro RNA miR396. Analysis plants carrying 3 allele insensitive to miR396 revealed strong boost in number cells leaves, which was further enhanced synergistically an additional increase 1 levels. Genetic experiments that can still cell gif1 mutants,...
Timing a switch in tissue integrity In plants, sperm cells travel through the pollen tube as it grows toward ovule. Successful fertilization depends on rupturing to release (see Perspective by Stegmann and Zipfel). Ge et al. Mecchia elucidated intercellular cross-talk that maintains during growth but destroys at just right moment. The signaling peptides RALF4 RALF19, derived from tube, maintain its grows. Once reach of ovule, related peptide, RALF34, which derives female tissues, takes over...
Abstract Background Development of eukaryotic organisms is controlled by transcription factors that trigger specific and global changes in gene expression programs. In plants, MADS-domain act as master regulators developmental switches organ specification. However, the mechanisms which these dynamically regulate their target genes at different stages are still poorly understood. Results We characterized relationship chromatin accessibility, expression, DNA binding two proteins Arabidopsis...
MicroRNAs (miRNAs) are ∼21 nt small RNAs that regulate gene expression in animals and plants. They can be grouped into families comprising different genes encoding similar or identical mature miRNAs. Several miRNA deeply conserved plant lineages key aspects of development, hormone signaling, stress response. The ancient miR396 regulates targets belonging to the GROWTH-REGULATING FACTOR (GRF) family transcription factors, which known control cell proliferation Arabidopsis leaves. In this...
To ensure an adequate organ mass, the daughters of stem cells progress through a transit-amplifying phase displaying rapid cell division cycles before differentiating. Here, we show that Arabidopsis thaliana microRNA miR396 regulates transition root into by interacting with GROWTH-REGULATING FACTORs (GRFs). The GRFs are expressed in but excluded from inhibition miR396. Inactivation increases meristem size and induces periclinal formative divisions cells. repress PLETHORA (PLT) genes,...
In flowers with dry stigmas, pollen development, pollination, and tube growth require spatial temporal regulation of water nutrient transport. To better understand the molecular mechanisms involved in reproductive processes, we characterized NIP4;1 NIP4;2, two pollen-specific aquaporins Arabidopsis thaliana. NIP4;2 are paralogs found exclusively angiosperm lineage. Although they have 84% amino acid identity, displayed different expression patterns. has low levels mature pollen, while peaks...
The Triple Gene Block 1 (TGBp1) protein encoded by the Potato virus X is a multifunctional that acts as suppressor of RNA silencing or facilitates passage from cell to promoting plasmodesmata opening. We previously showed membrane raft StRemorin1.3 able impair PVX infection. Here, we show overexpressed does not activity TGBp1, but affects its ability increase permeability. A similar effect on permeability was observed with other movement proteins, suggesting REM general regulator...
Proline-rich extensin-like receptor kinases (PERKs) belong to the hydroxyproline-rich glycoprotein (HRGP) superfamily known be involved in many plant developmental processes. Here, we characterized two pollen-expressed PERKs from Arabidopsis thaliana, PERK5 and PERK12. Pollen tube growth was impaired single double perk5-1 perk12-1 loss of function mutants, with an impact on seed production. When segregation analysed, a male gametophytic defect found, indicating that mutants carry deficient...
Plant cells are surrounded by a cell wall, rigid structure that is not only important for and organ shape, but also crucial intercellular communication interactions with the environment. In flowering plant Arabidopsis thaliana, 17 members of Catharanthus roseus RLK1-like (CrRLK1L) receptor kinase family involved in multitude physiological developmental processes, making it difficult to assess their primary or ancestral function. To reduce genetic complexity, we characterized single CrRLK1L...
Abstract Plant cells are surrounded by a cell wall, rigid structure that is not only important for and organ shape, but crucial intercellular communication interactions with the environment. In flowering plant Arabidopsis thaliana , 17 members of Catharanthus roseus RLK1-like ( Cr RLK1L) receptor kinase family involved in multitude physiological developmental processes, making it difficult to assess their primary or ancestral function. To reduce genetic complexity, we characterized single...
Summary SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASES (SERKs), which are subfamily II of leucine-rich repeat receptor-like kinases (LRR-RLKs), play diverse roles in development and immunity the angiosperm Arabidopsis thaliana . AtSERKs act as co-receptors for many LRR-RLKs, including BRASSINOSTEROID INSENSITIVE 1 (BRI1) FLAGELLIN SENSITIVE 2 (FLS2). 1–4 The conserved tyrosine (Y) residue AtSERK3 is crucial signaling specificity differentiating BRI1- FLS2-mediated pathways. 5 BRI1-ASSOCIATED...
Abstract Background Cell wall integrity plays an essential role during polarized cell growth typical of pollen tubes and root hairs. P roline-rich E xtensin-like R eceptor K inases (PERK) belong to the hydroxyproline-rich glycoprotein (HRGP) superfamily surface glycoproteins. Results Here, we identified two PERKs from Arabidopsis thaliana , PERK5 PERK12 highly expressed in mature pollen. Pollen tube was impaired single double perk5-1 perk12-1 loss function mutants, with a moderate impact on...