A5008395565- Plant Stress Responses and Tolerance
- Plant Molecular Biology Research
- Ion channel regulation and function
- Plant nutrient uptake and metabolism
- Plant and Biological Electrophysiology Studies
- Photoreceptor and optogenetics research
- Photosynthetic Processes and Mechanisms
- Aluminum toxicity and tolerance in plants and animals
- Legume Nitrogen Fixing Symbiosis
- Ion Channels and Receptors
- Plant Micronutrient Interactions and Effects
- Plant responses to water stress
- Plant Reproductive Biology
- Neuroscience and Neural Engineering
- Calcium signaling and nucleotide metabolism
- Mycorrhizal Fungi and Plant Interactions
- Cardiac electrophysiology and arrhythmias
- GABA and Rice Research
- Genomics and Phylogenetic Studies
- Genomics, phytochemicals, and oxidative stress
- Plant Genetic and Mutation Studies
- Botanical Research and Chemistry
- Plant Parasitism and Resistance
- Nitrogen and Sulfur Effects on Brassica
- Plant Diversity and Evolution
University of Talca
2016-2025
Universidad Politécnica de Madrid
2011-2018
Centre for Plant Biotechnology and Genomics
2011-2018
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
2014-2018
Heinrich Heine University Düsseldorf
2018
University of Potsdam
2006-2017
Max Planck Institute of Molecular Plant Physiology
1999-2017
Max Planck Society
1999-2017
Institut des Sciences des Plantes de Montpellier
2001-2008
Université de Montpellier
2008
Vascular plants appeared ~410 million years ago, then diverged into several lineages of which only two survive: the euphyllophytes (ferns and seed plants) lycophytes. We report here genome sequence lycophyte Selaginella moellendorffii (Selaginella), first nonseed vascular plant reported. By comparing gene content in evolutionarily diverse taxa, we found that transition from a gametophyte- to sporophyte-dominated life cycle required far fewer new genes than flowering plant, whereas secondary...
Microscopic pores present in the epidermis of plant aerial organs, called stomata, allow gas exchanges between inner photosynthetic tissue and atmosphere. Regulation stomatal aperture, preventing excess transpirational vapor loss, relies on turgor changes two highly differentiated epidermal cells surrounding pore, guard cells. Increased cell due to increased solute accumulation results opening, whereas decreased closing. Here we provide direct evidence, based reverse genetics approaches,...
Abstract Background Transcription factors (TFs) are key regulatory proteins that enhance or repress the transcriptional rate of their target genes by binding to specific promoter regions (i.e. cis -acting elements) upon activation de-activation upstream signaling cascades. TFs thus constitute master control elements dynamic networks. have fundamental roles in almost all biological processes (development, growth and response environmental factors) it is assumed they play immensely important...
The essential mineral nutrient potassium (K + ) is the most important inorganic cation for plants and recognized as a limiting factor crop yield quality. Nonetheless, it only partially understood how K contributes to plant productivity. used major active solute maintain turgor drive irreversible reversible changes in cell volume. also plays an role numerous metabolic processes, example, by serving cofactor of enzymes. Here, we provide evidence additional, previously unrecognized growth. By...
Abstract Background In plants, complex regulatory mechanisms are at the core of physiological and developmental processes. The phytohormone abscisic acid (ABA) is involved in regulation various such processes, including stomatal closure, seed bud dormancy, responses to cold, drought salinity stress. underlying tissue or plant-wide control circuits often include combinatorial gene networks that we only beginning unravel with help new molecular tools. increasing availability genomic sequences...
Plant growth and development is driven by osmotic processes. Potassium represents the major osmotically active cation in plants cells. The uptake of this inorganic osmolyte from soil Arabidopsis involves a root K+ module consisting two channel α-subunits, AKT1 AtKC1. AKT1-mediated potassium absorption K+-depleted was shown to depend on calcium-sensing proteins CBL1/9 their interacting kinase CIPK23. Here we show that upon activation CBL·CIPK complex low external homomeric channels open at...
At least four genes encoding plasma membrane inward K+ channels (K(in) channels) are expressed in Arabidopsis guard cells. A double mutant plant was engineered by disruption of a major K(in) channel gene and expression dominant negative construct. Using the patch-clamp technique revealed that this totally deprived cell (GCK(in)) activity, providing model to investigate roles activity plant. GCK(in) found be an essential effector stomatal opening triggered hyperpolarization thereby blue...
Potassium (K+) is inevitable for plant growth and development. It plays a crucial role in the regulation of enzyme activities, adjusting electrical membrane potential cellular turgor, regulating homeostasis stabilization protein synthesis. Uptake K+ from soil its transport to growing organs essential healthy allocation are performed by channels transporters belonging different families. In this review, we summarize knowledge on versatile physiological roles their behaviour under stress...
Reactive oxygen species (ROS) are essential for development and stress signaling in plants. They contribute to plant defense against pathogens, regulate stomatal transpiration, influence nutrient uptake partitioning. Although both Ca(2+) K(+) channels of plants known be affected, virtually nothing is the targets ROS at a molecular level. Here we report that single cysteine (Cys) residue within Kv-like SKOR channel Arabidopsis thaliana sensitivity H(2)O(2). We show H(2)O(2) rapidly enhanced...
Electrophysiological analyses conducted about 25 years ago detected two types of anion channels in the plasma membrane guard cells. One type channel responds slowly to changes voltage while other quickly. Consequently, they were named SLAC, for SLow Anion Channel, and QUAC, QUick Channel. Recently, genes SLAC1 QUAC1/ALMT12, underlying different current components, could be identified model plant Arabidopsis thaliana. Expression gene products Xenopus oocytes confirmed quick slow kinetics. In...
Abstract Climatic change is pointed as one of the major challenges for global food security. Based on current models climate change, reduction in precipitations and turn, increase soil salinity will be a sharp constraint crops productivity worldwide. In this context, root fungi appear new strategy to improve plant ecophysiological performance crop yield under abiotic stress. study, we evaluated impact two fungal endophytes Penicillium brevicompactum P. chrysogenum isolated from Antarctic...
Summary Plant outward‐rectifying K + channels mediate efflux from guard cells during stomatal closure and root into the xylem for root–shoot allocation of potassium (K). Intriguingly, gating these depends on extracellular concentration, although ions carrying current are derived inside cell. This dependence confers a sensitivity to concentration ([K ]) that ensures only, regardless [K ] prevailing outside. We investigated mechanism ‐dependent channel SKOR Arabidopsis by site‐directed...
KAT1 is a voltage-dependent inward rectifying K+ channel cloned from the higher plant Arabidopsis thaliana [Anderson, J. A., Huprikar, S. S., Kochian, L. V., Lucas, W. & Gaber, R. F. (1992) Proc. Natl. Acad. Sci. USA 89, 3736-3740]. It related to Shaker superfamily of channels characterized by six transmembrane spanning domains (S1-S6) and putative pore-forming region between S5 S6 (H5). The 115 Pro-247 Pro-271 in contains 14 additional amino acids when compared with [Aldrich, (1993)...
As heritage from early evolution, potassium (K(+)) is absolutely necessary for all living cells. It plays significant roles as stabilizer in metabolism and important enzyme activation, stabilization of protein synthesis, neutralization negative charges on cellular molecules proteins nucleic acids. Land plants even enlarged this spectrum K(+) utilization after having gone ashore, despite the fact that far less available their new oligotrophic habitats than sea water. Inevitably, plant cells...
Fast responses to an external threat depend on the rapid transmission of signals through a plant. Action potentials (APs) are proposed as such signals. Plant APs share similarities with their animal counterparts; they activity voltage-gated ion channels. Nonetheless, despite demonstrated role in (a)biotic stress responses, identities associated channels and transporters remain undefined higher plants. By demonstrating two potassium-selective Arabidopsis thaliana AP generation shaping, we...